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AT27C256R-45

Description
32K X 8 OTPROM, 120 ns, PDSO28
Categorystorage   
File Size176KB,9 Pages
ManufacturerAtmel (Microchip)
Download Datasheet Parametric View All

AT27C256R-45 Overview

32K X 8 OTPROM, 120 ns, PDSO28

AT27C256R-45 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals28
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Maximum supply/operating voltage5.5 V
Minimum supply/operating voltage4.5 V
Rated supply voltage5 V
maximum access time120 ns
Processing package descriptionPlastic, TSOP-28
stateDISCONTINUED
CraftsmanshipCMOS
packaging shapeRectangle
Package SizeSMALL OUTLINE, THIN PROFILE
surface mountYes
Terminal formGULL WING
Terminal spacing0.5500 mm
terminal coatingtin lead
Terminal locationpair
Packaging MaterialsPlastic/Epoxy
Temperature levelINDUSTRIAL
memory width8
organize32K × 8
storage density262144 deg
operating modeASYNCHRONOUS
Number of digits32768 words
Number of digits32K
Memory IC typeOTPROM
serial parallelparallel
AT27C256R
Features
Fast Read Access Time - 45 ns
Low Power CMOS Operation
100
µA
max. Standby
20 mA max. Active at 5 MHz
JEDEC Standard Packages
28-Lead 600-mil PDIP
32-Lead PLCC
28-Lead TSOP and SOIC
5V
±
10% Supply
High Reliability CMOS Technology
2,000V ESD Protection
200 mA Latchup Immunity
Rapid
Programming Algorithm - 100
µs/byte
(typical)
CMOS and TTL Compatible Inputs and Outputs
Integrated Product Identification Code
Commercial and Industrial Temperature Ranges
256K (32K x 8)
OTP
CMOS
EPROM
Description
The AT27C256R is a low-power, high performance 262,144 bit one-time programma-
ble read only memory (OTP EPROM) organized 32K by 8 bits. It requires only one
5V power supply in normal read mode operation. Any byte can be accessed in less
than 45 ns, eliminating the need for speed reducing WAIT states on high performance
microprocessor systems.
Atmel’s scaled CMOS technology provides low active power consumption, and fast
programming. Power consumption is typically only 8 mA in Active Mode and less
than 10
µA
in Standby.
(continued)
Pin Configurations
Pin Name
A0 - A14
O0 - O7
CE
OE
NC
Function
Addresses
Outputs
Chip Enable
Output Enable
No Connect
PDIP, SOIC Top View
AT27C256R
PLCC Top View
TSOP Top View
Type 1
Note: PLCC Package Pins 1 and
17 are DON’T CONNECT.
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