M27C322

Summary description

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Summary description

The M27C322 is a 32 Mbit EPROM offered in the UV range (ultra violet erase). It is ideally

suited for microprocessor systems requiring large data or program storage. It is organised

as 2 MWords of 16 bit. The pin-out is compatible with a 32 Mbit Mask ROM.

The FDIP42W (window ceramic frit-seal package) has a transparent lid which allows the

user to expose the chip to ultraviolet light to erase the bit pattern. A new pattern can then be

written rapidly to the device by following the programming procedure.

For applications where the content is programmed only one time and erasure is not

required, the M27C322 is offered in PDIP42 and SDIP42 packages.

In order to meet environmental requirements, ST offers the M27C322 in ECOPACK®

packages.

ECOPACK packages are Lead-free. The category of second Level Interconnect is marked

on the package and on the inner box label, in compliance with JEDEC Standard JESD97.

The maximum ratings related to soldering conditions are also marked on the inner box label.

ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

Figure 1.

Logic Diagram

Table 1.

Signal Names

A0-A20

Address Inputs

Q0-Q15

Data Outputs

E

Chip Enable

Output Enable / Program Supply

Supply Voltage

Ground

AI02156

21

A0-A20

GVPP

Q0-Q15

VCC

M27C322

E

VSS

16