PY291A-20DM datasheet(4/9 Pages) PYRAMID

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PY291A

Page 4 of 9

Document # EPROM101 REV OR

DEVICE ERASURE

If the device is subjected to wavelengths of light below

4000 Angstroms, device erasure will commence. It is

therefore recommended to use an opaque label over the

window in the event the device will be exposed to lighting

for a long time. The UV dose for erasure requires a

wavelength of 2,537 Angstroms for a minimum dose of

25 Wsec/cm2. If using a UV lamp of 12 mW/cm2, the

exposure time is estimated to be 35 minutes. Devices

should be positioned within 1 inch of the lamp during the

erasure process. Permanent damage can occur to the

devices if exposed to UV light for an extended period of

time.

Read or Output Disable

A10-A0

CS3

CS2

CS1

O7-O0

Other

A10-A0

PGM

VFY

VPP

D7-D0

A10-A0

VIH

VIL

O7-O0

A10-A0

VIH

High Z

A10-A0

XVIL

High Z

A10-A0

VIL

High Z

A10-A0

VILP

VIHP

VPP

D7-D0

A10-A0

VIHP

VILP

VPP

O7-O0

A10-A0

VIHP

VPP

High Z

A10-A0

VILP

VIHP

VPP

D7-D0

A10-A0

VIHP

VILP

VPP

Zeros

Pin Function

Mode

Blank Check Zeros

Output Disable

Program

Program Verify

Read

Output Disable

Program Inhibit

Intelligent Program

MODE SELECTION

PROGRAMMING PINOUTS

X = Don't Care

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