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March 2000

M27W512

512 Kbit (64Kb x8) Low Voltage UV EPROM and OTP EPROM

s

2.7V to 3.6V SUPPLY VOLTAGE in READ

OPERATION

s

ACCESS TIME:

s

PIN COMPATIBLE with M27C512

s

LOW POWER CONSUMPTION:

–15

µA max Standby Current

– 15mA max Active Current at 5MHz

s

PROGRAMMING TIME 100

µs/byte

s

HIGH RELIABILITY CMOS TECHNOLOGY

– 2,000V ESD Protection

– 200mA Latchup Protection Immunity

s

ELECTRONIC SIGNATURE

– Manufacturer Code: 20h

– Device Code: 3Dh

DESCRIPTION

The M27W512 is a low voltage 512 Kbit EPROM

offered in the two range UV (ultra violet erase) and

OTP (one time programmable). It is ideally suited

for microprocessor systems and is organized as

65,536 by 8 bits.

The M27W512 operates in the read mode with a

supply voltage as low as 2.7V at –40 to 85

°C tem-

perature range. The decrease in operating power

allows either a reduction of the size of the battery

or an increase in the time between battery re-

charges.

The FDIP28W (window ceramic frit-seal package)

has transparent lid which allows the user to ex-

pose the chip to ultraviolet light to erase the bit pat-

tern. A new pattern can then be written to the

device by following the programming procedure.

For applications where the content is programmed

only one time and erasure is not required, the

M27W512 is offered in PDIP28, PLCC32 and

TSOP28 (8 x 13.4 mm) packages.

Figure 1. Logic Diagram

AI01584

16

Q0-Q7

VCC

M27W512

GVPP

VSS

8

A0-A15

E

1

28

28

1

FDIP28W (F)

PDIP28 (B)

PLCC32 (K)

TSOP28 (N)

8 x 13.4 mm