TMS27C240 262144 BY 16BIT UV ERASABLE

TMS27PC240 262144 BY 16BIT

PROGRAMMABLE READONLY MEMORIES

SMLS240D− NOVEMBER 1990 − REVISED SEPTEMBER 1997

1

POST OFFICE BOX 1443

’27C / PC240-10

100 ns

’27C / PC240-12

120 ns

’27C / PC240-15

150 ns

Microprocessor-Based Systems

Programming

Standard TTL Loads

and Output Lines

− Active . . . 275 mW Worst Case

− Standby . . . 0.55 mW Worst Case

(CMOS-Input Levels)

description

The TMS27C240 series are 262 144 by 16-bit (4 194 304-bit), ultraviolet-light erasable, electrically

programmable read-only memories (EPROMs).

The TMS27PC240 series are 262 144 by 16-bit (4 194 304-bit), one-time programmable (OTP) electrically

programmable read-only memories (PROMs).

These devices are fabricated using power-saving CMOS technology for high speed and simple interface with

MOS and bipolar circuits. All inputs (including program data inputs) can be driven by Series 74 TTL circuits

without the use of external pull-up resistors. Each output can drive one Series 74 TTL circuit without external

resistors.

The TMS27C240 EPROM is offered in a dual-in-line ceramic package (J suffix) designed for insertion in

mounting hole rows on 15,2-mm (600-mil) centers. The TMS27C240 is offered with two choices of temperature

ranges of 0

°C to 70°C (JL suffix) and − 40°C to 85°C (JE suffix). See Table 1.

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.

A0 − A17

Address Inputs

DQ0 − DQ15

Inputs (programming) / Outputs

E

Chip Enable

G

Output Enable

GND

Ground

NC

No Connection

VCC

5-V Supply

VPP

13-V Power Supply ‡

PIN NOMENCLATURE

† Pins 11 and 30 (J package) and pins 12 and 34

(FN package) must be connected externally to

ground.

‡ Only in program mode

39

38

37

36

35

34

33

32

31

30

29

1

18 19

7

8

9

10

11

12

13

14

15

16

17

20 21 22 23

5

43

2

6

42 41 40

24 25 26 27 28

44 43

A13

A12

A11

A10

A9

GND†

NC

A8

A7

A6

A5

DQ12

DQ11

DQ10

DQ9

DQ8

GND†

NC

DQ7

DQ6

DQ5

DQ4

TMS27PC240 FN PACKAGE

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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.