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25AA040A Datasheet(PDF) 1 Page - Microchip Technology

Part # 25AA040A
Description  4K SPI Bus Serial EEPROM
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

25AA040A Datasheet(HTML) 1 Page - Microchip Technology

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© 2009 Microchip Technology Inc.
DS21827F-page 1
25AA040A/25LC040A
Device Selection Table
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
• 512 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:
• Pb-Free and RoHS Compliant
Pin Function Table
Description:
The Microchip Technology Inc. 25XX040A* is a 4 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 25XX040A 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)
Part Number
VCC Range
Page Size
Temp. Ranges
Packages
25AA040A
1.8-5.5V
16 Bytes
I
P, MS, SN, ST, MC, OT
25LC040A
2.5-5.5V
16 Bytes
I, E
P, MS, SN, ST, MC, OT
- Industrial (I):
-40
°Cto +85°C
- Automotive (E):
-40
°Cto +125°C
Name
Function
CS
Chip Select Input
SO
Serial Data Output
WP
Write-Protect
VSS
Ground
SI
Serial Data Input
SCK
Serial Clock Input
HOLD
Hold Input
VCC
Supply Voltage
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
PDIP/SOIC
(P, SN)
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
TSSOP/MSOP
(ST, MS)
X-Rotated TSSOP
HOLD
VCC
CS
SO
1
2
3
4
8
7
6
5
SCK
SI
VSS
WP
(X/ST)
VSS
1
2
3
4
6
5
VDD
CS
SO
(OT)
SOT-23
SCK
SI
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
(MC)
DFN
4K SPI Bus Serial EEPROM
*25XX040A is used in this document as a generic part number for the
25AA040A and the 25LC040A.


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