LTS-3401TBE 0.8-Inch Blue LED Display Datasheet - Digit Height 20.32mm - Forward Voltage 3.8V - Power 70mW - Takardar Fasaha ta Hausa

1. Bayyani Game da Samfur

LTS-3401TBE wani tsari ne mai ƙarfi, na'urar nuni ta haruffa da lambobi bakwai sashi (seven-segment) wanda aka ƙera don aikace-aikacen da ke buƙatar karanta lambobi masu haske da bayyananne. Aikin sa na farko shi ne wakilcin lambobi (0-9) da wasu haruffa ta amfani da sassan LED masu sarrafa kansu. Na'urar tana amfani da guntu na LED shuɗi bisa InGaN akan tushen sapphire. Nuni yana da fuskar launin toka mai haske da launin fari na sashi, wanda ke ba da bambanci mai girma don ingantaccen karantawa. An rarrabe shi a matsayin nau'in nuni na anode gama gari, ma'ana anodes na duk sassan suna haɗuwa a ciki zuwa ƙafafu gama gari, yana buƙatar tsarin turawa mai nutsewar kwayar halitta.

1.1 Fa'idodi na Asali da Kasuwar da Ake Nufi

An ƙera wannan nuni don aiki mai ƙarancin wutar lantarki, wanda ya sa ya dace da na'urorin da ke amfani da baturi ko masu kula da makamashi. Manyan fa'idodi sun haɗa da ƙarancin buƙatar kwayar halitta, tare da sassan da za a iya turawa yadda ya kamata a ƙananan kwayoyin halitta har zuwa 1mA, da kuma ingantaccen daidaiton haske tsakanin sassan don bayyanar daidai. Babban haske da faɗin kusurwar kallo suna tabbatar da ganuwa daga mahanga daban-daban. Gininsa mai ƙarfi yana ba da ingantaccen dogaro da tsawon rayuwar aiki idan aka kwatanta da sauran fasahohin nuni. Manyan kasuwannin da ake nufi sun haɗa da kayan aikin ɗaukar hoto, na'urorin lantarki na mabukaci, allunan sarrafa masana'antu, kayan aikin gwaji, da kowane na'ura da ke buƙatar ƙaramin nuni na lambobi mai dogaro.

2. Zurfin Binciken Ma'auni na Fasaha

2.1 Halaye na Haske da na Gani

Aikin gani shine tsakiyar aikin nuni. A ƙarƙashin daidaitaccen yanayin gwaji na kwayar halitta ta gaba (I_F) kowane sashi, matsakaicin ƙarfin haske (I_V) ya bambanta daga mafi ƙanƙanta na 6.4 millicandelas (mcd) zuwa ƙimar al'ada na 10 mcd. Ana auna wannan ƙarfin ta amfani da firikwensin da aka tace don dacewa da lanƙwan amsawar ido na CIE photopic, yana tabbatar da cewa ƙimar tana da alaƙa da fahimtar ɗan adam. Tsawon zango mai rinjaye (λ_d) an ƙayyade shi a nanomita 470 (nm), yana sanya fitarwa a yankin shuɗi na bakan gani. Tsawon zango mafi girma na fitarwa (λ_p) yawanci 468 nm ne, kuma rabin faɗin layin bakan (Δλ) shine 25 nm, yana nuna launin shuɗi mai tsafta. Matsakaicin daidaiton ƙarfin haske tsakanin sassan shine 2:1 mafi girma, yana tabbatar da yarda da daidaito a cikin lambar.

2.2 Ma'auni na Lantarki

Halayen lantarki suna bayyana buƙatun turawa da iyakoki. Matsakaicin matsakaicin ci gaba na gaba kowane sashi shine 20 mA a 25°C, yana raguwa a layi daya da 0.25 mA/°C yayin da yanayin zafi ke ƙaruwa. Matsakaicin kwayar halitta ta gaba, don aikin bugun jini a cikin aikin 1/10 da faɗin bugun 0.1ms, na iya kaiwa 100 mA. Ƙarfin lantarki na gaba (V_F) kowane sashi, wanda aka auna a I_F=20mA, yana da matsakaicin ƙimar volt 3.8, tare da ƙimar al'ada na volt 3.3. Wannan ma'auni yana da mahimmanci don ƙirar kewayawar iyakance kwayar halitta. Matsakaicin ɓarnawar wutar lantarki kowane sashi shine 70 mW. Kwayar halitta ta baya (I_R) an iyakance shi zuwa matsakaicin 100 µA a ƙarfin lantarki na baya (V_R) na 5V, ko da yake ba a nufin na'urar don ci gaba da aikin bias na baya.

2.3 Ma'auni na Zafi da Muhalli

An ƙididdige na'urar don kewayon zafin aiki na -35°C zuwa +85°C, tare da daidaitaccen kewayon zafin ajiya. Wannan faɗin kewayon ya sa ya dace da yanayi daban-daban. Muhimmin ƙayyadaddun sarrafawa shine iyakar zafin solder: na'urar na iya jurewa matsakaicin 260°C har zuwa dakika 3, wanda aka auna 1.6mm (1/16 inch) ƙasa da matakin wurin zama, wanda ke da mahimmanci ga bayanan taron PCB ta amfani da hanyoyin solder reflow.

3. Bayanin Injiniya da Marufi

3.1 Girma da Rangwame

Nuni yana da tsayin lamba 0.8 inches (20.32 mm). Duk girman marufi an bayar da su a cikin milimita. Rangwamen gabaɗaya shine ±0.25 mm sai dai idan an ƙayyade su. Muhimman bayanan injiniya sun haɗa da rangwamen motsin ƙafar ƙafar na ±0.4 mm, iyakoki akan abubuwan waje da gurɓataccen tawada a saman sashi, da iyaka akan lanƙwasa mai nuni (≤1% na tsawonsa). Ana ba da shawarar diamita ramin PCB don ƙafafu shine 1.0 mm don tabbatar da dacewa mai kyau.

3.2 Tsarin Ƙafafu da Zanen Haɗi

Na'urar tana da ƙafafu 18 a cikin tsarin marufi biyu a layi (DIP). Zanen kewayawa na ciki ya tabbatar da tsarin gine-ginen anode gama gari. Haɗin ƙafar kamar haka ne: Ƙafafu 4, 6, 12, da 17 sune Haɗin Anode Gama Gari. Cathodes na sashi suna rarrabawa a kan sauran ƙafafu: A (Ƙafa 2), B (Ƙafa 15), C (Ƙafa 13), D (Ƙafa 11), E (Ƙafa 5), F (Ƙafa 3), da G (Ƙafa 14). Bugu da ƙari, akwai cathodes don maki goma na hagu (L.D.P, Ƙafa 7) da maki goma na dama (R.D.P, Ƙafa 10). Ƙafafu 1, 8, 9, 16, da 18 an lura da su a matsayin ba su da haɗi (NO PIN). Wannan tsarin ƙafar yana da mahimmanci don ƙira da tsarin shimfidar PCB da kewayawar turawa.

4. Binciken Lanƙwan Aiki

Takardar bayanan tana nuni zuwa lanƙwan halaye na lantarki da na gani na al'ada, waɗanda suka zama ma'auni don abubuwan LED. Duk da yake ba a ƙididdige takamaiman zane-zane a cikin rubutun da aka bayar, waɗannan lanƙwan yawanci sun haɗa da alaƙar tsakanin kwayar halitta ta gaba (I_F) da ƙarfin lantarki na gaba (V_F), wanda ba layi ba ne kuma yana da mahimmanci don ƙirar turawa. Wani lanƙwan na gama gari yana nuna ƙarfin haske da kwayar halitta ta gaba, yana nuna yadda haske ke ƙaruwa tare da kwayar halitta. Na uku na al'ada yana kwatanta canjin tsawon zango mai rinjaye ko ƙarfin lantarki na gaba dangane da zafin haɗin gwiwa. Binciken waɗannan lanƙwan yana ba masu ƙira damar inganta aiki, fahimtar inganci, da hasashen halayen a ƙarƙashin yanayin aiki daban-daban, kamar bambancin zafin jiki ko tsare-tsaren duhu.

5. Jagororin Solder da Tari

5.1 Ma'auni na Solder Reflow

Kamar yadda aka lura a cikin matsakaicin ƙididdiga, na'urar na iya jurewa matsakaicin zafin solder na 260°C har zuwa tsawon lokaci na dakika 3. Wannan ya yi daidai da bayanan reflow solder marasa gubar na al'ada. Dole ne masu ƙira su tabbatar cewa bayanan zafi da ake amfani da su yayin taron PCB bai wuce wannan iyaka ba don hana lalacewa ga guntu na LED na ciki, haɗin waya, ko marufin filastik.

5.2 Kariya daga Zubar da Lantarki Mai Tsanani (ESD)

LEDs suna da hankali ga zubar da lantarki mai tsanani. Don hana lalacewar ESD yayin sarrafawa da taro, ana ƙarfafa matakan masu zuwa: Ma'aikata ya kamata su yi amfani da igiyoyin wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan w

.3 Storage Conditions

The device should be stored within its specified temperature range of -35°C to +85°C. It is advisable to store components in moisture-barrier bags with desiccant if they are sensitive to moisture absorption, though this specific requirement is not called out in the provided datasheet. Proper handling to avoid mechanical stress on the pins or the display face is also important.

. Application Suggestions

.1 Typical Application Scenarios

The LTS-3401TBE is ideal for any application requiring a compact, low-power numeric display. Common uses include digital multimeters, frequency counters, clock displays, weighing scales, medical monitoring equipment, automotive dashboard readouts (for non-critical information), and industrial process indicators. Its blue color offers good visibility and can be chosen for aesthetic or functional differentiation from traditional red or green displays.

.2 Design Considerations and Circuitry

When designing a driver circuit, the common anode configuration must be considered. This typically involves connecting the common anode pins to a positive supply voltage (V_CC) through a possible current-limiting resistor for the common line. Each segment cathode is then connected to a driver IC capable of sinking the required segment current. The current for each segment must be limited based on the desired brightness and the maximum ratings. Using the typical forward voltage of 3.3V-3.8V, the current-limiting resistor value can be calculated as R = (V_CC- V_F) / I_F. For multiplexing multiple digits, the peak current must be managed to stay within the pulsed current rating while maintaining average brightness. Designers should also account for the 2.5% maximum crosstalk specification, which defines the unintended illumination of a non-selected segment.

. Technical Comparison and Differentiation

Compared to older incandescent or vacuum fluorescent displays (VFDs), this LED display offers significantly lower power consumption, longer lifetime, and higher reliability due to its solid-state nature. Within the LED display segment, its key differentiators are its specific low-current optimization (down to 1mA per segment), which is lower than many standard displays, and its categorization for luminous intensity, providing better brightness consistency. The blue color, achieved with InGaN technology, typically offers higher efficiency and different aesthetic options compared to older red GaAsP LEDs. The inclusion of both left and right decimal points adds flexibility for different numerical formatting needs.

. Frequently Asked Questions (Based on Technical Parameters)

Q: What is the difference between common anode and common cathode?

A: In a common anode display, all LED segment anodes are connected together to a common pin (or pins), which is connected to the positive supply. Segments are turned ON by applying a LOW (ground) signal to their respective cathode pins. In a common cathode display, the cathodes are common and connected to ground, and segments are turned ON by applying a HIGH signal to their anodes. The LTS-3401TBE is a common anode type.

Q: Can I drive this display with a 5V microcontroller?

A: Yes, but you must use current-limiting resistors. Since the forward voltage is about 3.3-3.8V, a resistor is needed to drop the remaining voltage (e.g., 5V - 3.5V = 1.5V) and limit the current to the desired value (e.g., 10mA would require a 150Ω resistor). The driver pins of the microcontroller must be able to sink the required segment current.

Q: What does "categorized for luminous intensity" mean?

A: It means the displays are tested and binned (grouped) based on their measured luminous output. This ensures more consistent brightness between different units of the same model, leading to a more uniform appearance if multiple displays are used in a single product.

Q: How do I connect the four common anode pins?

A: All common anode pins (4, 6, 12, 17) should be connected together to the same positive voltage supply line, typically through a single current-limiting resistor if driving all segments of a single digit simultaneously. This ensures all segments have the same reference voltage.

. Practical Design and Usage Example

Consider designing a simple digital voltmeter display. The microcontroller's analog-to-digital converter reads a voltage, processes it, and needs to display a 3-digit value (e.g., 5.12V). Three LTS-3401TBE displays would be used. The common anode pins of all three digits would be connected to three separate microcontroller I/O pins configured as digital outputs for multiplexing control. All corresponding segment cathodes (all 'A' segments, all 'B' segments, etc.) across the three digits would be connected together and then to eight microcontroller I/O pins (seven segments + one decimal point) via appropriate current-limiting resistors, likely using a transistor array or dedicated display driver IC to handle the current sink. The microcontroller rapidly cycles (multiplexes) through each digit, turning on one common anode at a time while setting the cathode pattern for that specific digit. The persistence of vision makes all digits appear continuously lit. The right decimal point on the middle digit would be illuminated to show the decimal place. The low current capability allows this multiplexing scheme to work efficiently without excessive power draw.

. Operating Principle Introduction

A seven-segment LED display is an assembly of light-emitting diodes arranged in a figure-eight pattern. Each of the seven segments (labeled A through G) is an individual LED. By selectively powering different combinations of these segments, the patterns for numerals 0-9 and some letters can be formed. In the LTS-3401TBE, these LEDs are fabricated from InGaN semiconductor material deposited on a sapphire substrate. When a forward voltage exceeding the diode's threshold is applied, electrons and holes recombine in the active region, releasing energy in the form of photons (light). The specific composition of the InGaN layers determines the wavelength (color) of the emitted light, in this case, blue. The common anode design simplifies the driving circuitry in many applications where the power supply is positive relative to the control logic ground.

. Technology Trends and Context

Seven-segment LED displays represent a mature and reliable display technology. While dot-matrix and graphic OLED/LCD displays offer more flexibility for showing arbitrary characters and graphics, seven-segment displays remain highly relevant due to their simplicity, low cost, high brightness, excellent readability in various lighting conditions (including direct sunlight), and extremely low power consumption in static or low-multiplexing scenarios. The trend in this segment is towards higher efficiency LEDs (more lumens per watt), allowing for even lower drive currents or higher brightness, and towards surface-mount device (SMD) packages for automated assembly, though through-hole DIP packages like this one are still widely used for prototyping, repair, and certain industrial applications. The move to lead-free and RoHS-compliant packaging, as seen with this device, is now a standard industry requirement.