MH74188 IC

MH74188 IC

The
MH74188
is a high-speed, bipolar, electrically programmable read-only memory (PROM). It is organized as
32 words of 8 bits each
, providing a total capacity of
256 bits
. This IC is designed for applications requiring fast access times and reliable permanent data storage, such as constant memories or logic circuit replacements.

Features

Organization:
32 words 8 bits.

Output Type:
Three-state (3-state) outputs, allowing for easy expansion and bus-oriented applications.

Input Protection:
All inputs are equipped with clamping diodes to minimize line reflections and protect the device.

Technology:
High-speed bipolar integration

Specifications

Parameter

Symbol

Value / Range

Unit

Supply Voltage

U
CC

4.75 5.25

V

Input Low Voltage

U
IL

-0.5 +0.8

V

Input High Voltage

U
IH

+2.0 +5.5

V

Output Low Current

I
OL

max. 12

mA

Output High Voltage

U
OH

max. 5.5

V

Access Time (Address)

t
AVQV

50

ns

Enable Time (Selection)

t
SLQL

50

ns

Operating Temperature

a

0 +70

C

Pin Configuration

Pin No.

Symbol

Function Description

1 7

Q
1
Q
7

Data Outputs (Bits 1-7)

8

GND

Ground (Negative Supply)

9

Q
8

Data Output (Bit 8)

10

A
1

Address Input 1

11

A
2

Address Input 2

12

A
3

Address Input 3

13

A
4

Address Input 4

14

A
5

Address Input 5

15

S (V)

Selection / Enable Input (Active Low)

16

V
CC

Supply Voltage (+5V)

Applications

Constant Storage:
Ideal for storing fixed data, lookup tables, and mathematical constants.

Logic Function Generators:
Can be programmed to replace complex combinational logic circuits.

Address Decoding:
Useful in microcomputer systems for memory mapping and peripheral selection.

Package Content

1 x MH74188 IC

DataSheet

MH74188