Datasheet

 1997-2012 Microchip Technology Inc. DS21231E-page 1
25AA160/25LC160/25C160
Device Selection Table
Features:
• Low-power CMOS technology:
- Write current: 3 mA maximum
- Read current: 500 A typical
- Standby current: 500 nA typical
• 2048 x 8-bit organization
• 16 byte page
• Write cycle time: 5 ms max.
• Self-timed erase and write cycles
• 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 M cycles
- Data retention: > 200 years
- ESD protection: > 4000V
• 8-pin PDIP and SOIC packages
• Temperature ranges supported:
Description:
The Microchip Technology Inc. 25AA160/25LC160/
25C160 (25XX160
*
) are 16 Kbit 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 separate 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.
Package Types
Block Diagram
Part
Number
VCC
Range
Max Clock
Frequency
Temp
Ranges
25AA160 1.8-5.5V 1 MHz I
25LC160 2.5-5.5V 2 MHz I
25C160 4.5-5.5V 3 MHz I,E
- Industrial (I): -40Cto +85C
- Automotive (E) (25C160): -40°C to +125°C
25XX160
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
PDIP/SOIC
SI
SO
SCK
CS
HOLD
WP
Status
Register
I/O Control
Memory
Control
Logic
X
Dec
HV Generator
EEPROM
Array
Page Latches
Y Decoder
Sense Amp.
R/W Control
Logic
VCC
VSS
16K SPI Bus Serial EEPROM
Not recommended for new designs –
Please use 25AA160A/B or 25LC160A/B.