25AA128_09 Datasheet, PDF (1/26 Pages) Microchip Technology – 128K SPI Bus Serial EEPROM

25AA128/25LC128
128K SPI Bus Serial EEPROM
Device Selection Table
Part Number
VCC Range
25LC128
25AA128
2.5-5.5V
1.8-5.5V
Page Size
64 Byte
64 Byte
Temp. Ranges
I,E
I
Packages
P, SN, ST, MF
P, SN, ST, MF
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
• 16,384 x 8-bit Organization
• 64 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: 1,000,000 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
• Pb-free and RoHS Compliant
Pin Function Table
Name
Function
CS
SO
WP
VSS
SI
SCK
HOLD
VCC
Chip Select Input
Serial Data Output
Write-Protect
Ground
Serial Data Input
Serial Clock Input
Hold Input
Supply Voltage
Description
The Microchip Technology Inc. 25AA128/25LC128
(25XX128^*) are 128k-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,
transitions on its inputs will be ignored, with the
exception of Chip Select, allowing the host to service
higher priority interrupts.
The 25XX128 is available in standard packages
including 8-lead PDIP and SOIC, and advanced
packaging including 8-lead DFN and 8-lead TSSOP.
Package Types (not to scale)
TSSOP
(ST)
PDIP/SOIC
(P, SN)
CS ¹
SO 2
WP ³
VSS ⁴
8 _VCC
7 _HOLD
6 _SCK
5 _SI
CS 1
SO 2
WP 3
VSS 4
8 VCC
7 HOLD
6 SCK
5 SI
X-Rotated TSSOP
(X/ST)
HOLD ¹
VCC 2
CS ³
SO ⁴
8 _SCK
7 _SI
6 _VSS
5 _WP
CS 1
SO 2
WP 3
VSS 4
DFN
(MF)
8 VCC
7 HOLD
6 SCK
5 SI
* 25XX128 is used in this document as a generic part number for the 25AA128, 25LC128 devices.
© 2009 Microchip Technology Inc.
DS21831D-page 1