PY291A
2K X 8 REPROGRAMMABLE PROM
FEATURES
Windowed devices for reprogramming
EPROM Technology for reprogramming
Fully TTL Compatible Inputs and Outputs
Standard Pinout (JEDEC Approved)
High Speed
– 20/25/35/50 ns (Commercial)
– 35/50 ns (Military)
– 24-Pin 300 mil DIP
Low Power Operation: 660 mW
Single 5V±10% Power Supply
– Windowed CERDIP
– Non-Windowed CERDIP
– Non-Windowed Plastic DIP
DESCRIPTION
To perform a read operation from the device, CS1 is
LOW and CS2 and CS3 are HIGH. The memory contents
intheaddressestablishedbytheAddresspins(A0 toA10)
will become available on the outputs (O0 to O7).
The PY291A is a 2Kx8 CMOS PROM. The device is
availableinwindowedpackageswhichwhenexposedto
UVlight,thememorycontentinthePROMiserasedand
can be reprogrammed. EPROM technology is used in
the memory cells for programming. The EPROM re-
quires a 12.5V for programming. Devices are tested to
insure that performance of the device meets the DC and
AC specification limits after customer programming.
ThePY291Aisavailablein24-pin300milCeramicDIPs
(CERDIP, Windowed and Non-Windowed) and Plastic
DIPs (Non-Windowed).
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATION
DIP (P4, D4, WD1)
Note: Window on WD1 package only
Document # EPROM101 REV OR
Revised June 2007
1
PYRAMID [ PYRAMID SEMICONDUCTOR CORPORATION ]
