25AA020A Datasheet, PDF (1/28 Pages) Microchip Technology – 2K SPI Bus Serial EEPROM

25AA020A/25LC020A
2K SPI Bus Serial EEPROM
Device Selection Table
Part Number
VCC Range
25AA020A
25LC020A
1.8-5.5V
2.5-5.5V
Page Size
16 Bytes
16 Bytes
Temp. Ranges
I
I, E
Packages
P, MS, SN, ST, MC, OT
P, MS, SN, ST, MC, OT
Features:
• 10 MHz max. clock frequency
• 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
• 256 x 8-bit organization
• Write Page mode (up to 16 bytes)
• Sequential Read
• 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
• 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 packages available
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. 25XX020A* is a 2 Kbit
Serial Electrically Erasable Programmable Read-Only
Memory (EEPROM). 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.
The 25XX020A is available in standard packages
including 8-lead PDIP and SOIC, and advanced
packages including 8-lead MSOP, 8-lead TSSOP and
rotated TSSOP, 8-lead 2x3 DFN, and 6-lead SOT-23.
Package Types (not to scale)
TSSOP/MSOP
(ST, MS)
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
SOT-23
(OT)
SCK 1
VSS ²
SI ³
6 VDD
5 _CS
4 _SO
DFN
(MC)
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
*25XX020A is used in this document as a generic part number for the
25AA020A and the 25LC020A.
© 2006 Microchip Technology Inc.
Preliminary
DS21833C-page 1