TMS27C256 Datasheet: Programmable ROM





TMS27C256 Programmable ROM Datasheet

Part Number TMS27C256
Description Programmable ROM
Manufacture etcTI
Total Page 13 Pages
PDF Download Download TMS27C256 Datasheet PDF

Features: D Organization . . . 32768 by 8 Bits D S ingle 5-V Power Supply D Pin Compatible With Existing 256K MOS ROMs, PROMs, an d EPROMs D All Inputs / Outputs Fully T TL Compatible D Max Access / Min Cycle Time VCC ± 10% ’27C/ PC256-10 100 ns ’27C/ PC256-12 120 ns ’27C/ PC256- 15 150 ns ’27C/ PC256-17 170 ns ’27 C/ PC256-20 200 ns ’27C/ PC256-25 250 ns D Power Saving CMOS Technology D Ve ry High-Speed SNAP! Pulse Programming D 3-State Output Buffers D 400-mV Minimu m DC Noise Immunity With Standard TTL L oads D Latchup Immunity of 250 mA on Al l Input and Output Lines D Low Power Di ssipation ( VCC = 5.5 V ) – Active . . . 165 mW Worst Case – Standby . . . 1.4 mW Worst Case (CMOS Input Levels) D Temperature Range Options D 256K EPRO M Available With MIL-STD-883C Class B H igh Reliability Processing (SMJ27C256) description The TMS27C256 series are 32 768 by 8-bit (262 144-bit), ultraviole t (UV) light erasable, electrically pro grammable read-only memories (EPROMs). The TMS27PC256 series are 32 768 by 8-bit.

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D Organization . . . 32768 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
VCC ± 10%
’27C/ PC256-10 100 ns
’27C/ PC256-12 120 ns
’27C/ PC256-15 150 ns
’27C/ PC256-17 170 ns
’27C/ PC256-20 200 ns
’27C/ PC256-25 250 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 ( VCC = 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 8-BIT UV ERASABLE
TMS27PC256 32768 BY 8-BIT
PROGRAMMABLE READ-ONLY MEMORIES
SMLS256H– SEPTEMBER 1984 – REVISED NOVEMBER 1997
J PACKAGE
( TOP VIEW )
VPP
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VCC
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
1

                    
                 






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