CD4511B - BCD-to-7-Segment Latch Decoder Driver | Texas Instruments
料号： CD4511B ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.45 | $0.45 |
| 10 | $0.38 | $3.80 |
| 100 | $0.3 | $30.00 |
| 500 | $0.25 | $125.00 |
| 1,000 | $0.2 | $200.00 |
CD4511B 概述
A BCD-to-7-segment decoder is a digital combinational circuit that translates a 4-bit BCD input (0000 to 1001) into the appropriate 7-segment display code (a-g). It is a fundamental building block in digital display systems, converting binary data into human-readable numeric output. The CD4511B belongs to the CD4000 series of CMOS logic ICs, which are known for wide supply voltage operation (3V to 18V), low power consumption, and high noise immunity. This decoder sits between a counter or microcontroller and the display, simplifying the interface and reducing the number of I/O pins required.
Key features of the CD4511B include lamp test (LT), blanking (BL), and latch enable (LE) inputs. The lamp test input forces all segments on to verify display functionality. The blanking input can shut off the display or be used for intensity modulation via pulse-width modulation. The latch enable input stores the BCD code, allowing multiplexed displays where several digits share the same decoder. The device also features an internal pull-down on the BCD inputs, ensuring a defined logic level when inputs are floating.
Technically, the CD4511B is fabricated on a single monolithic structure combining CMOS logic with bipolar output transistors, a process known as BiCMOS. This architecture provides the low power consumption of CMOS with the high current drive capability of bipolar transistors. The outputs are active-high and can source 25 mA, sufficient for driving standard LEDs with appropriate current-limiting resistors. The device operates over a supply voltage range of 3V to 18V, with a typical quiescent current of only 80 µA at 5V, making it suitable for battery-powered applications.
Typical applications include digital clocks, frequency counters, digital voltmeters, and any system requiring numeric display. The CD4511B is often used with 7-segment LED displays in instrumentation, consumer electronics, and industrial control panels. Its ability to latch data makes it ideal for multiplexed display systems, reducing the number of decoder ICs needed.
When designing with the CD4511B, ensure that the supply voltage is within the specified range and that current-limiting resistors are placed in series with each segment to prevent excessive current. The blanking input can be used for brightness control by applying a PWM signal. For multiplexed displays, the latch enable input should be pulsed after the BCD data is stable to avoid display flicker.
直接替换替代料： CD4511B ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
CD4511BE
✅ 直接替换📋 参考替代料（不在目录中）
CD4511BNSR
✅ 直接替换📋 参考替代料（不在目录中）
CD4511BPWR
✅ 直接替换📋 参考替代料（不在目录中）
MC14511BCP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
HCF4511BEY
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TC4511BP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
HEF4511BP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NTE4511B
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CD4511B 最大额定值与电气特性
| 功能 | BCD-to-7-segment latch decoder driver |
| Technology | CMOS with bipolar outputs |
| Supply Voltage Range | 3 V to 18 V |
| Output Current (source) | 25 mA per segment |
| Input Type | BCD (4-bit) |
| 输出类型 | 7-segment active-high |
| Latch Enable | Yes |
| Lamp Test | Yes |
| Blanking | Yes |
| Quiescent Current (typical) | 80 µA at 5 V |
| 工作温度范围 | -55°C to +125°C |
| Package Options | PDIP-16, SOIC-16, TSSOP-16 |
| 安装类型 | Through-hole or Surface Mount |
| RoHS 状态 | Compliant |
| 引脚数 | 16 |
CD4511B 引脚配置
| 引脚 1 | B — BCD input B |
| 引脚 2 | C — BCD input C |
| 引脚 3 | LT — Lamp test input (active low) |
| 引脚 4 | BL — Blanking input (active high) |
| 引脚 5 | LE — Latch enable input |
| 引脚 6 | D — BCD input D (MSB) |
| 引脚 7 | A — BCD input A (LSB) |
| 引脚 8 | VSS — Ground |
| 引脚 9 | e — Segment e output |
| 引脚 10 | d — Segment d output |
| 引脚 11 | c — Segment c output |
| 引脚 12 | b — Segment b output |
| 引脚 13 | a — Segment a output |
| 引脚 14 | g — Segment g output |
| 引脚 15 | f — Segment f output |
| 引脚 16 | VDD — Positive supply |
典型应用
CD4511B 适用于 6 应用s: Digital Clock, Frequency Counter, Digital Voltmeter, Industrial Control Panel, Battery-Powered Device, Multiplexed Display System.
Digital Clock
The CD4511B is used to drive 7-segment displays in digital clocks. Its latch enable allows multiplexing of multiple digits, reducing the number of decoder ICs needed. The 25 mA output current directly drives common-cathode LEDs, simplifying the design. The low quiescent current is ideal for battery-powered clocks, and the wide supply voltage range accommodates various power sources.
推荐
Frequency Counter
In frequency counters, the CD4511B converts the measured frequency count into a readable display. The latch enable feature holds the displayed value while the next measurement is taken, preventing flicker. The high noise immunity of CMOS ensures reliable operation in electrically noisy environments. The 25 mA segment drive allows bright displays for visibility in lab settings.
推荐
Digital Voltmeter
The CD4511B is used in digital voltmeters to display the measured voltage. The BCD inputs come from an ADC or counter, and the decoder drives the 7-segment display. The blanking input can be used to implement auto-ranging or to blank leading zeros. The low power consumption is beneficial for portable multimeters, and the wide operating temperature range ensures accuracy in various environments.
推荐
Industrial Control Panel
The CD4511B is used in industrial control panels to display process parameters such as temperature, pressure, or count. Its robust CMOS construction and wide supply voltage range make it suitable for industrial environments. The latch enable allows updating displays without flicker, and the lamp test feature aids in maintenance. The 25 mA output can drive large, high-brightness LEDs for visibility in factory settings.
推荐
Battery-Powered Device
The CD4511B is ideal for battery-powered devices due to its low quiescent current of 80 µA at 5V. It can drive low-power LEDs directly, minimizing additional components. The wide supply voltage range (3V to 18V) allows operation from various battery chemistries. The latch enable feature reduces power consumption by holding the display data, allowing the microcontroller to sleep.
推荐
Multiplexed Display System
The CD4511B is commonly used in multiplexed display systems where multiple digits share a single decoder. The latch enable input stores the BCD code for each digit, allowing time-division multiplexing. This reduces the number of decoder ICs and I/O pins required. The high output current ensures each digit is bright enough even with a low duty cycle. The blanking input can be used to eliminate ghosting during multiplexing.
推荐
推荐产品汇总
工程参考数据： CD4511B ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CD4511BE | MC14511BCP | HCF4511BEY |
|---|---|---|---|---|
| Package | PDIP-16, SOIC-16, TSSOP-16 | PDIP-16 | PDIP-16 | PDIP-16 |
| Brand | Texas Instruments | Texas Instruments | onsemi | STMicroelectronics |
| Supply Voltage Range | 3V to 18V | 3V to 18V | 3V to 18V | 3V to 18V |
| Output Current (source) | 25 mA | 25 mA | 25 mA | 25 mA |
| Latch Enable | Yes | Yes | Yes | Yes |
| Lamp Test | Yes | Yes | Yes | Yes |
| Blanking | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C |
关键差异点
- High output current capability （对比 74LS47)
- Wide supply voltage range （对比 74LS47)
- Low power consumption （对比 74LS47)
设计说明
The CD4511B operates from 3V to 18V. Ensure the supply voltage is within this range and adequately decoupled with a 0.1µF ceramic capacitor close to the VDD pin. The quiescent current is typically 80µA at 5V, but increases with supply voltage and frequency. For battery-powered designs, consider using the latch enable to hold outputs and reduce dynamic power consumption.
Place current-limiting resistors (typically 220-470 ohms) in series with each segment output to prevent excessive current through the LEDs. The CD4511B can source up to 25mA per segment, so calculate resistor values based on LED forward voltage and desired brightness. Keep traces short to minimize noise and ensure proper grounding.
The blanking (BL) input is active high; when high, all outputs are off. Do not leave BL floating; tie it to ground for normal operation. Similarly, the lamp test (LT) input is active low; tie it high for normal operation. The latch enable (LE) should be low for transparent mode; when high, the outputs are latched. Ensure BCD inputs are valid (0-9); invalid codes (10-15) will blank the display.
合规信息
RoHS compliant per TI product page. Not AEC-Q100 qualified. Halogen-free status not specified in provided data.
