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25AA040/C040/LC040 Datasheet

  • 25AA040/C040/LC040

  • 25AA040/C040/LC040 Datasheet

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  • 22頁

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25AA040/25LC040/25C040
4K SPI
鈩?/div>
Bus Serial EEPROM
Device Selection Table
Part
Number
25AA040
25LC040
25C040
V
CC
Range
1.8-5.5V
2.5-5.5V
4.5-5.5V
Max. Clock
Frequency
1 MHz
2 MHz
3 MHz
Temp.
Ranges
I
I
I,E
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. Also, write operations to the device can be
disabled via the write-protect pin (WP).
Package Types
PDIP
CS
SO
WP
V
SS
1
8
V
CC
HOLD
SCK
SI
25XX040
Features
鈥?Low-power CMOS technology
- Write current: 3 mA typical
- Read current: 500
碌A(chǔ)
typical
- Standby current: 500 nA typical
鈥?512 x 8-bit organization
鈥?16 byte page
鈥?Write cycle time: 5 ms max.
鈥?Self-timed ERASE and WRITE cycles
鈥?Block write protection
- Protect none, 1/4, 1/2 or all of array
鈥?Built-in write protection
- Power on/off data protection circuitry
- Write enable latch
- Write-protect pin
鈥?Sequential read
鈥?High reliability
- Endurance: 1M cycles
- Data retention: > 200 years
- ESD protection: > 4000V
鈥?8-pin PDIP, SOIC, and TSSOP packages
鈥?Temperature ranges supported:
- Industrial (I):
-40擄C to +85擄C
- Automotive (E) (25C040):
-40擄C to +125擄C
2
3
4
7
6
5
SOIC
CS
SO
WP
V
SS
1
8
V
CC
HOLD
SCK
SI
25XX040
2
3
4
7
6
5
TSSOP
HOLD
V
CC
CS
SO
1
8
SCK
SI
V
SS
WP
25XX040
2
3
4
7
6
5
Block Diagram
Status
Register
HV Generator
I/O Control
Logic
Memory
Control
Logic
EEPROM
Array
XDEC
Page
Latches
Description
The Microchip Technology Inc. 25AA040/25LC040/
25C040 (25XX040
*
) is a 4 Kbit serial Electrically
Erasable PROM. The memory is accessed via a simple
Serial Peripheral Interface鈩?(SPI鈩? 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.
*25XX040 is used in this document as a generic part number
for the 25AA040/25LC040/25C040 devices. SPI is a
trademark of Motorola Corporation.
SI
SO
CS
SCK
HOLD
WP
V
CC
V
SS
Y Decoder
Sense Amp.
R/W Control
錚?/div>
2003 Microchip Technology Inc.
DS21204D-page 1

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