AT25HP256 Datasheet, PDF (1/15 Pages) ATMEL Corporation – SPI Serial EEPROMs

Features
• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
• 10 MHz Clock Rate
• 128-Byte Page Mode Only for Write Operations
• Low-Voltage and Standard-Voltage Operation
– 5.0 (V_CC = 4.5V to 5.5V)
– 2.7 (V_CC = 2.7V to 5.5V)
– 1.8 (V_CC = 1.8V to 3.6V)
• Block Write Protection
– Protect 1/4, 1/2, or Entire Array
• Write Protect (WP) Pin and Write Disable Instructions for
Both Hardware and Software Data Protection
• High Reliability
– Endurance: 100K Write Cycles
– Data Retention: > 40 Years
– ESD Protection: > 3000V
• 8-Pin PDIP, 8-Pin EIAJ SOIC, and 8-Pin Leadless Array Package
Description
The AT25HP256/512 provides 262,144/524,288 bits of serial electrically erasable pro-
grammable read only memory (EEPROM) organized as 32,768/65,536 words of 8-bits
each. The device is optimized for use in many industrial and commercial applications
where high-speed, low-power, and low-voltage operation are essential. The
AT25HP256/512 is available in a space saving 8-pin PDIP (AT25HP256/512), 8-pin
EIAJ SOIC (AT25HP256), and 8-pin Leadless Array (AT25HP256/512) packages. In
(continued)
SPI Serial
EEPROMs
256K (32,768 x 8)
512K (65,536 x 8)
AT25HP256
AT25HP512
Preliminary
Pin Configurations
Pin Name
CS
SCK
SI
SO
GND
VCC
WP
HOLD
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Write Protect
Suspends Serial Input
8-Pin PDIP
CS 1
SO ²
WP ³
GND ⁴
8 VCC
7 _HOLD
6 _SCK
5 _SI
8-Pin SOIC
CS 1
SO ²
WP ³
GND ⁴
8 VCC
7 _HOLD
6 _SCK
5 _SI
8-Pin Leadless Array
VCC 8
HOLD 7
SCK 6
SI 5
1 CS
2 SO
3 WP
4 GND
Bottom View
Rev. 1113B–07/98
1