CD4099 8-bit Addressable Latch


CD4099 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4099 has an 8-bit Addressable Latch

CD4099 has a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family. It has buffered output which improves transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.

CD4099 Features

  • Wide supply voltage range: 3.0V to 15V
  • High noise immunity: 0.45 VDD (typ.)
  • Low power TTL: fan out of 2 driving 74L
    • compatibility: or 1 driving 74LS
  • Serial to parallel capability
  • Storage register capability
  • Random (addressable) data entry
  • Active high demultiplexing capability
  • Common active high clear

CD4099 Specifications

Absolute Maximum Ratings

  • DC Supply Voltage Range, (VDD): -0.5V to +18V
  • Power Dissipation (PD)
    • Dual-In-Line 700 mW
    • Small Outline 500 mW
  • Input Voltage Range, All Inputs: -0.5V to VDD +0.5V
  • DC Input Current, Any One Input: ±10mA
  • Storage Temperature Range (TSTG): -65oC to +150oC
  • Lead Temperature (During Soldering): +260oC
    • At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum

CD4099 Pinout Diagram

CD4099 Pin Description

Pin NoPin NameDescription
1Q7Output Of Addressable Latch Q7
2CLClear Input Pin
3DData Input Pin
4E’Active Low Enable Input Pin
5A0Address Input A0
6A1 Address Input A1
7A2 Address Input A2
8VSSSupply Voltage
9Q0 Output Of Addressable Latch Q0
10Q1 Output Of Addressable Latch Q1
11Q2 Output Of Addressable Latch Q2
12Q3 Output Of Addressable Latch Q3
13Q4 Output Of Addressable Latch Q4
14Q5 Output Of Addressable Latch Q5
15Q6 Output Of Addressable Latch Q6
16VDDDrain Voltage

CD4099 Circuit


  • Generally, latches are used to keep the conditions of the bits to encode binary numbers
  • Latches are single bit storage elements which are widely used in computing as well as data storage.
  • Latches are used in the circuits like power gating & clock as a storage device

CD4099 Alternative Equivalent

Download CD4099 8-bit Addressable Latch Datasheet from the link given below.