TMS27C256-2JL Datasheet, PDF (1/13 Pages) Texas Instruments – TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT

D Organization . . . 32 768 by 8 Bits
D Single 5-V Power Supply
D Pin Compatible With Existing 256K MOS
ROMs, PROMs, and EPROMs
D All Inputs / Outputs Fully TTL Compatible
D Max Access / Min Cycle Time
V_CC ± 10%
’27C/ PC256-10
’27C/ PC256-12
’27C/ PC256-15
’27C/ PC256-17
’27C/ PC256-20
’27C/ PC256-25
100 ns
120 ns
150 ns
170 ns
200 ns
250 ns
D Power Saving CMOS Technology
D Very High-Speed SNAP! Pulse
Programming
D 3-State Output Buffers
D 400-mV Minimum DC Noise Immunity With
Standard TTL Loads
D Latchup Immunity of 250 mA on All Input
and Output Lines
D Low Power Dissipation ( V_CC = 5.5 V )
− Active . . . 165 mW Worst Case
− Standby . . . 1.4 mW Worst Case
(CMOS Input Levels)
D Temperature Range Options
D 256K EPROM Available With MIL-STD-883C
Class B High Reliability Processing
(SMJ27C256)
description
The TMS27C256 series are 32 768 by 8-bit
(262 144-bit), ultraviolet (UV) light erasable,
electrically programmable read-only memories
(EPROMs).
The TMS27PC256 series are 32 768 by 8-bit
(262 144-bit), one-time programmmable (OTP)
electrically programmable read-only memories
(PROMs).
TMS27C256 32768 BY 8ĆBIT UV ERASABLE
TMS27PC256 32768 BY 8ĆBIT
PROGRAMMABLE READĆONLY MEMORIES
SMLS256H− SEPTEMBER 1984 − REVISED NOVEMBER 1997
J PACKAGE
( TOP VIEW )
V_{PP 1}
A12 ₂
A7 ₃
A6 ₄
A5 ₅
A4 ₆
A3 7
A2 8
A1 9
A0 10
DQ0 11
DQ1 12
DQ2 13
GND 14
28 ^V_CC
27 ^A14
26 ^A13
25 ^A8
24 ^A9
23 ^A11
22 G
21 A10
20 E
19 DQ7
18 DQ6
17 DQ5
16 DQ4
15 DQ3
FM PACKAGE
( TOP VIEW )
A6
A5
A4
A3
A2
A1
A0
NC
DQ0
4 3 2 1 32 31 30
5
29
6
28
7
27
8
26
9
25
10
24
11
23
12
22
13
21
14 15 16 17 18 19 20
A8
A9
A11
NC
G
A10
E
DQ7
DQ6
PIN NOMENCLATURE
A0 −A14
DQ0 −DQ7
E
G
GND
NC
NU
VCC
VPP
Address Inputs
Inputs (programming) / Outputs
Chip Enable / Powerdown
Output Enable
Ground
No Internal Connection
Make No External Connection
5-V Power Supply
13-V Power Supply ^†
† _{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.
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.
Copyright  1997, Texas Instruments Incorporated
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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