TMS27C512 65536 BY 8-BIT UV ERASABLE

TMS27PC512 65536 BY 8-BIT

PROGRAMMABLE READ-ONLY MEMORIES

SMLS512G – NOVEMBER 1985 – REVISED SEPTEMBER 1997

2

POST OFFICE BOX 1443

description (continued)

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 pullup resistors. Each output can drive one Series 74 TTL circuit without external

resistors.

The data outputs are 3-state for connecting multiple devices to a common bus. The TMS27C512 and the

TMS27PC512 are pin compatible with 28-pin 512K MOS ROMs, PROMs, and EPROMs.

The TMS27C512 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 TMS27PC512 OTP PROM is supplied in a 32-lead

plastic leaded chip carrier package using 1,25-mm (50-mil) lead spacing (FM suffix).

The TMS27C512 and TMS27PC512 are offered with two choices of temperature ranges of 0

°C to 70°C (JL and

FML suffix) and – 40

°C to 85°C (JE and FME suffix). See Table 1.

All package styles conform to JEDEC standards.

Table 1. Temperature Range Suffixes

EPROM

AND

SUFFIX FOR OPERATING

FREE-AIR TEMPERATURE RANGES

OTP PROM

0

°C TO 70°C

–40

°C TO 85°C

TMS27C512-xxx

JL

JE

TMS27PC512-xxx

FML

FME

These EPROMs and OTP PROMs operate from a single 5-V supply (in the read mode), thus are ideal for use

in microprocessor-based systems. One other 13-V supply is needed for programming. All programming signals

are TTL level. The device is programmed using the SNAP! Pulse programming algorithm. The SNAP! Pulse

For programming outside the system, existing EPROM programmers can be used. Locations can be

programmed singly, in blocks, or at random.