25AA320A Datasheet, PDF (1/26 Pages) Microchip Technology – 32K SPI Bus Serial EEPROM

25AA320A/25LC320A
32K SPI Bus Serial EEPROM
Device Selection Table
Part Number
VCC Range
25LC320A
25AA320A
2.5-5.5V
1.8-5.5V
Page Size
32 Byte
32 Byte
Temp. Ranges
I,E
I
Packages
P, SN, ST, MS
P, SN, ST, MS
Features:
• Max. clock 10 MHz
• Low-power CMOS technology
- Max. Write Current: 5 mA at 5.5V, 10 MHz
- Read Current: 5 mA at 5.5V, 10 MHz
- Standby Current: 5 μA at 5.5V
• 4096 x 8-bit organization
• 32 byte page
• Self-timed erase and write cycles (5 ms max.)
• Block write protection
- Protect none, 1/4, 1/2 or all of array
• Built-in write protection
- Power-on/off data protection circuitry
- Write enable latch
- Write-protect pin
• Sequential read
• High reliability
- Endurance: >1M erase/write cycles
- Data retention: > 200 years
- ESD protection: > 4000V
• Temperature ranges supported;
- Industrial (I):
-40°C to +85°C
- Automotive (E):
-40°C to +125°C
• Standard and Pb-free packages available
Pin Function Table
Name
Function
CS
Chip Select Input
SO
Serial Data Output
WP
Write-Protect
VSS
Ground
SI
SCK
HOLD
Serial Data Input
Serial Clock Input
Hold Input
VCC
Supply Voltage
Description:
The Microchip Technology Inc. 25AA320A/25LC320A
(25XX320A^*) are 32k-bit Serial Electrically Erasable
PROMs. The memory is accessed via a simple Serial
Peripheral Interface (SPI) compatible serial bus. The
bus signals required are a clock input (SCK) plus sep-
arate data in (SI) and data out (SO) lines. Access to the
device is controlled through a Chip Select (CS) input.
Communication to the device can be paused via the
hold pin (HOLD). While the device is paused, transi-
tions on its inputs will be ignored, with the exception of
Chip Select, allowing the host to service higher priority
interrupts.
The 25XX320A is available in standard packages
including 8-lead PDIP and SOIC, and advanced
packaging including 8-lead MSOP, and 8-lead TSSOP.
All packages are Pb-free.
Package Types (not to scale)
TSSOP/MSOP
(ST, MS)
CS ¹
SO 2
WP ³
VSS ⁴
8 _VCC
7 _HOLD
6 _SCK
5 _SI
PDIP/SOIC
(P, SN)
CS 1
SO 2
WP 3
VSS 4
8 VCC
7 HOLD
6 SCK
5 SI
*25XX320A is used in this document as a generic part number
for the 25AA320A, 25LC320A devices.
© 2007 Microchip Technology Inc.
DS21828C-page 1