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CD4511BE

BCD-to-7-segment latch/decoder/driver, 25mA, PDIP-16

5000

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制造商零件：

CD4511BE

包装：

PDIP-16 (19.3 x 6.35 x 4.57mm, 2.54mm pitch, through-hole)

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说明

产品概览

The CD4511BE from Texas Instruments is a CMOS BCD-to-7-segment latch/decoder/driver with active-HIGH segment outputs, capable of directly driving common-cathode LED displays at up to 25mA per segment in a 16-pin PDIP package.

主要规格

功能 BCD-to-7-segment latch/decoder/driver
电源电压 3V to 18V
输入 4-bit BCD (D, C, B, A)
输出 7 segment outputs (a-g), active HIGH
输出电流 25mA per segment @ VDD=10V
Latch Enable Active LOW (transparent when LOW)
Lamp Test Active LOW (all segments on)
Blanking Active LOW (all segments off, for leading zero suppression)
Invalid BCD (10-15) All segments off (blank)
工作温度 -55°C to +125°C
包装 PDIP-16 (19.3 x 6.35mm)

特点

  • BCD-to-7-segment decode + latch in one IC
  • 25mA output drive — directly drives LEDs
  • Lamp test input — all segments on for diagnostics
  • Ripple blanking input — leading zero suppression
  • Blanking on invalid BCD inputs (10-15)
  • CMOS 4000B: 3V-18V operation

应用

  • BCD counter display driver
  • Multiplexed multi-digit displays
  • Digital clock and timer
  • Instrumentation panel display

The CD4511BE from Texas Instruments is a CMOS BCD-to-7-segment latch/decoder/driver that accepts a 4-bit BCD input and drives a common-cathode 7-segment LED display. Unlike the CD4026 (which is a counter+decoder), the CD4511 only decodes — it doesn’t count. This makes it suitable for use with external counters (CD4017, CD4029, 74LS90, or microcontroller BCD outputs). The 25mA output current per segment is sufficient to directly drive LEDs with appropriate current-limiting resistors (typically 220Ω-1kΩ per segment at 5V). The latch stores the BCD value when LE goes HIGH, freezing the display while the input changes. The Lamp Test (LT, active LOW) turns all segments on simultaneously for display verification. The Blanking Input (BI, active LOW) turns all segments off for leading zero suppression or display multiplexing. Invalid BCD inputs (10-15) are automatically blanked. The BE suffix denotes the PDIP-16 package with full temperature range.

The CD4511BE has three functional blocks: (1) A 4-bit transparent latch controlled by LE: when LE is LOW, the latch is transparent (outputs follow inputs); when LE goes HIGH, the current BCD value is latched and held. (2) A BCD-to-7-segment decoder that converts the latched BCD value to 7-segment format. Digits 0-9 produce normal segment patterns; digits 10-15 (invalid BCD) produce blank output (all segments off). (3) An output driver that provides active-HIGH current-limited outputs capable of sourcing up to 25mA per segment. The three control inputs override the decoded output: LT (Lamp Test) activates all segments regardless of BCD input — used to check for burned-out LEDs. BI (Blanking Input) deactivates all segments — used for display blanking during multiplexing or for leading zero suppression. When both LT and BI are inactive (HIGH), the segment outputs follow the decoded BCD value. For leading zero suppression: connect the RBI of the most significant digit to GND; if that digit is 0, its segments are blanked AND its RBO goes LOW; connect this RBO to the next digit’s RBI, causing cascading blanking of leading zeros. The 4511 does NOT have a Ripple Blanking Output (RBO) — for ripple blanking, use the CD4543 or handle it with external logic.

针脚 名称 类型 说明
1 B 输入 BCD input B (2^1)
2 C 输入 BCD input C (2^2)
3 LT 输入 Lamp test (active LOW, all segments on)
4 BI 输入 Blanking input (active LOW, all segments off)
5 LE 输入 Latch enable (LOW=transparent, HIGH=latched)
6 D 输入 BCD input D (MSB, 2^3)
7 A 输入 BCD input A (LSB, 2^0)
8 VSS 电源 地面
9 e 输出 Segment e output
10 d 输出 Segment d output
11 c 输出 Segment c output
12 b 输出 Segment b output
13 a 输出 Segment a output
14 g 输出 Segment g output
15 f 输出 Segment f output
16 VDD 电源 Supply (3V to 18V)
  • Single Digit Display: MCU 4-bit BCD → CD4511 inputs D,C,B,A; LE=LOW; 220Ω resistors on a-g; common-cathode display; displays 0-9
  • Multiplexed 4-Digit: One CD4511; 4 common-cathode displays; digit enable via PNP transistors; MCU scans digits at 100Hz
  • Counter Display: CD4017 or 74LS90 counter → CD4511 BCD inputs; LE=LOW (transparent); displays count on 7-segment
  • Latched Display: LE=LOW to load value; then LE=HIGH to freeze display; MCU can change BCD without affecting displayed value
模型 制造商 主要区别 包装 Supply
CD4511BM TI SOIC-16 surface-mount version with identical logic function and 3-18V range SOIC-16 3-18V
CD4511BE TI Through-hole DIP version for prototyping and legacy board repair DIP-16 3-18V
HEF4511BT 恩智浦 Pin-compatible CMOS version with improved ESD protection and 3-15V supply SOIC-16 3-15V
MC144511BDR2G onsemi Pin-compatible equivalent with RoHS compliance and AEC-Q100 automotive option SOIC-16 3-18V
74HC4511D TI/Nexperia HC CMOS version with higher speed and 2-6V supply for modern logic systems SOIC-16 2-6V
74HC4511N TI/Nexperia HC CMOS through-hole version for prototyping with 2-6V supply range DIP-16 2-6V
74HCT4511D Nexperia HCT version with TTL-compatible inputs for mixed 5V TTL/CMOS systems SOIC-16 4.5-5.5V

CD4511 is the CMOS 4000-series bcd-to-7-segment latch/decoder/driver operating over the wide 3-18V supply range. The HEF4511 (NXP) and MC144511 (onsemi) are direct pin-compatible equivalents. For higher speed at the cost of narrower voltage range, the 74HC4511 HC/HCT families offer significantly faster propagation delay and lower power consumption at 2-6V. Surface-mount versions use the BM/M suffix (SOIC); through-hole versions use the BE suffix (DIP).

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Tel / WhatsApp: +86 13760382860

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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