CD4099 - 8 bit Addressable Latch IC

CD4099 - 8 bit Addressable Latch IC

The CD4099 8-bit addressable latch IC is a serial-input, parallel-output storage register that can perform a variety of functions. Data are inputted to a particular bit in the latch when that bit is addressed (by means of input A0, A1, A2) and when WRITE DISABLE is at a low level. When WRITE DISABLE is high, data entry is inhibited; however, all 8 outputs can be continuously read independently of WRITE DISABLE and address inputs.

A master RESET input is available, which resets all bits to a logic "0" level when RESET and WRITE DISABLE is at a high level. When RESET is at a high level, and WRITE RESET is at a low level, the latch acts as a 1-of-8 demultiplexer; the bit that is addressed has an active output that follows the data input, while all unaddressed bits are held to a logic "0" level.

The CD4099 types are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix), 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

check out : Quad NOR R-S Latch Tri-state IC - CD4043

Pinout:

Pin No
Pin Name
Description

1
Q7
Output Pin 7 of Latch

2
CL
Clear Output Pin

3
D
Data Input

4
E’
Enable Pin

5
A0
Input Pin 0 of Latch

6
A1
Input Pin 1 of Latch

7
A2
Input Pin 2 of Latch

8
VSS
Source Supply

9
Q0
Output Pin 0 of Latch

10
Q1
Output Pin 1 of Latch

11
Q2
Output Pin 2 of Latch

12
Q3
Output Pin 3 of Latch

13
Q4
Output Pin 4 of Latch

14
Q5
Output Pin 5 of Latch

15
Q6
Output Pin 6 of Latch

16
VDD
Drain Supply

Applications:

• Multi-line decoders

• A/D converters