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CD4051BE

8-ch analog mux/demux, 3-20V, 125Ω Ron, PDIP-16

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Manufacturer Part：

CD4051BE

Package：

PDIP-16 (19.3×7.62 mm, 2.54mm pitch, through-hole)

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Description

Product Overview

The CD4051BE from Texas Instruments is a CMOS single 8-channel analog multiplexer/demultiplexer with logic-level conversion. It can switch analog signals up to 20V peak-to-peak with digital control from 3V to 20V. Featuring low ON resistance (125Ω typical at 15V), bidirectional signal paths, and break-before-make switching, it is packaged in a 16-pin PDIP for through-hole prototyping and production.

Key Specifications

Channels 8:1 single-channel multiplexer
Analog Signal Range ≤20V peak-to-peak
Single Supply Range 3V to 20V
Dual Supply Range ±3V to ±10V
ON Resistance 125Ω (typical at VDD=15V)
Channel Leakage (OFF) ±10 pA (typical at VDD=15V)
Quiescent Power 0.2 µW (typical)
Address Setup Time ~200 ns
Operating Temperature -55°C to +125°C
Package PDIP-16 (7.62mm width)

Features

  • 8-channel analog multiplexing/demultiplexing
  • 3-bit binary address selection with inhibit control
  • Low ON resistance: 125Ω typical at 15V supply
  • Ultra-low OFF leakage: ±10 pA typical
  • Break-before-make switching eliminates channel overlap
  • Bidirectional signal path (analog I/O)
  • Logic-level conversion between digital and analog domains
  • ESD protection: 3000V HBM, 2000V CDM

Applications

  • Multi-channel analog-to-digital conversion input selection
  • Sensor multiplexing and data acquisition
  • Audio signal routing and switching
  • Keypad scanning with microcontroller
  • Digital-to-analog converter output demultiplexing

The CD4051BE from Texas Instruments is a CMOS single 8-channel analog multiplexer/demultiplexer with logic-level conversion capability. It can switch analog signals up to 20V peak-to-peak using 3-bit binary address control, with low 125Ω ON resistance and ultra-low ±10 pA OFF leakage. The break-before-make switching and bidirectional signal paths make it ideal for analog signal routing, sensor multiplexing, and data acquisition systems.

The CD4051BE uses CMOS transmission gates to connect one of eight analog channels (Y0-Y7) to a common output (COM) based on a 3-bit binary address (A, B, C). An active-high inhibit (INH) input disables all channels when asserted. The internal decoding logic selects the appropriate transmission gate pair (one PMOS, one NMOS in parallel) to form a low-resistance bidirectional switch. Break-before-make switching ensures no two channels are simultaneously connected. The VEE pin allows negative analog signal handling when dual supplies are used, enabling signal swing below ground.

Pin Name Type Function
1 Y4 Analog Channel 4 analog I/O
2 Y6 Analog Channel 6 analog I/O
3 COM Analog Common analog I/O (output/input)
4 Y7 Analog Channel 7 analog I/O
5 Y5 Analog Channel 5 analog I/O
6 INH Digital Inhibit (active-high, disables all channels)
7 VEE Power Negative analog supply (connect to VSS for single supply)
8 VSS Power Ground (digital)
9 A Digital Address input LSB
10 B Digital Address input middle bit
11 C Digital Address input MSB
12 Y3 Analog Channel 3 analog I/O
13 Y0 Analog Channel 0 analog I/O
14 Y1 Analog Channel 1 analog I/O
15 Y2 Analog Channel 2 analog I/O
16 VDD Power Positive supply (3-20V)
  • Multi-channel ADC input selection for data acquisition systems
  • Multiple sensor signal multiplexing to a single ADC input
  • Audio signal routing and switching in consumer electronics
  • Keypad scanning with microcontroller GPIO expansion
  • DAC output demultiplexing to multiple analog channels
Manufacturer Part Number Package Notes
TI CD4051BM96 SOIC-16 SMD version of CD4051BE
ON Semiconductor MC14051BDWR2G SOIC-16 Direct equivalent, SMD
TI DG408DJZ DIP-16 Lower Ron (35Ω), higher performance
Analog Devices ADG708BRUZ TSSOP-16 2.5Ω Ron, 1.8-5.5V, high perf
Nexperia 74HC4051D SOIC-16 HC version, 2-10V, faster switching
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