TMS27C020 262144 BY 8-BIT UV ERASABLE
TMS27PC020 262144 BY 8-BIT
PROGRAMMABLE READ-ONLY MEMORIES
SMLS020C – NOVEMBER 1990 – REVISED SEPTEMBER 1997
J PACKAGE
(TOP VIEW)
Organization . . . 262144 by 8 Bits
Single 5-V Power Supply
V
V
CC
Operationally Compatible With Existing
Megabit EPROMs
1
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
PP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
PGM
A17
A14
A13
A8
A9
A11
G
2
3
Industry Standard 32-Pin Dual-In-line
Package and 32-Lead Plastic Leaded Chip
Carrier
4
5
6
All Inputs/Outputs Fully TTL Compatible
7
±10% V
Tolerance
CC
8
Max Access/Min Cycle Time
± 10%
9
V
A10
E
10
11
12
13
14
15
16
CC
’27C/PC020-10
’27C/PC020-12
’27C/PC020-15
’27C/PC020-20
’27C/PC020-25
100 ns
120 ns
150 ns
200 ns
250 ns
A0
DQ7
DQ6
DQ5
DQ4
DQ3
DQ0
DQ1
DQ2
GND
8-Bit Output For Use in
Microprocessor-Based Systems
Very High-Speed SNAP! Pulse
Programming
TMS27PC020
FM PACKAGE
(TOP VIEW)
Power Saving CMOS Technology
3-State Output Buffers
400 mV Minimum DC Noise Immunity With
Standard TTL Loads
4
3 2 1 32 31 30
A7
A6
A14
5
29
Latchup Immunity of 250 mA on All Input
and Output Pins
6
28 A13
27 A8
26 A9
A5
7
No Pullup Resistors Required
A4
8
9
25
24
23
22
21
A3
A11
G
Low Power Dissipation (V
= 5.5 V)
CC
10
11
12
13
A2
– Active . . . 165 mW Worst Case
– Standby . . . 0.55 mW Worst Case
(CMOS-Input Levels)
A1
A10
E
A0
DQ0
DQ7
Temperature Range Options
14 15 16 17 18 19 20
description
The TMS27C020 series are 262144 by 8-bit
(2097152-bit), ultraviolet (UV) light erasable,
electrically programmable read-only memories
(EPROMs).
PIN NOMENCLATURE
A0–A17
Address Inputs
DQ0–DQ7
Inputs (programming)/Outputs
Chip Enable
E
G
GND
PGM
Output Enable
Ground
Program
5-V Power Supply
13-V Power Supply
The TMS27PC020 series are one-time program-
mable (OTP) electrically programmable read-only
memories (PROMs).
V
CC
V
PP
†
† Only in program mode
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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