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參數(shù)資料
| 型號： | 24C256 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 256K IIC CMOS serial EEPROM(4.5~5.5V,256K位,100K擦寫周期,EEPROM) |
| 中文描述： | 256K進(jìn)口證的CMOS串行EEPROM（4.5?5.5V的，256K位，10萬擦寫周期和EEPROM） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 191K |
| 代理商： | 24C256 |
1997 Microchip Technology Inc.
Preliminary
DS21203A-page 1
M
24AA256/24LC256/24C256
2
C
CMOS Serial EEPROM
DEVICE SELECTION TABLE
FEATURES
Low power CMOS technology
- Maximum write current 3 mA at 5.5V
- Maximum read current 400
- Standby current 500 nA typical at 5.5V
2-wire serial interface bus, I
Cascadable for up to eight devices
Self-timed ERASE/WRITE cycle
64-byte page-write mode available
Fast write cycle time in byte or page mode
- 5 ms max for 24LC256 and 24C256
- 10 ms max for 24AA256
Hardware write protect for entire array
Schmitt trigger inputs for noise suppression
1,000,000 erase/write cycles guaranteed
Electrostatic discharge protection > 4000V
Data retention > 200 years
8-pin PDIP and SOIC (208 mil) packages
Temperature ranges:
- Commercial (C):
- Industrial (I):
- Automotive (E):
μ
A at 5.5V
2
C compatible
DESCRIPTION
The Microchip Technology Inc. 24AA256/24LC256/
24C256 (24xx256*) is a 32K x 8 (256K bit) Serial Elec-
trically Erasable PROM, capable of operation across a
broad voltage range (1.8V to 5.5V). It has been devel-
oped for advanced, low power applications such as per-
sonal communications or data acquisition. This device
also has a page-write capability of up to 64 bytes of
data. This device is capable of both random and
sequential reads up to the 256K boundary. Functional
address lines allow up to eight devices on the same
bus, for up to 2Mbit address space. This device is avail-
able in the standard 8-pin plastic DIP, and 8-pin SOIC
(208 mil) packages.
PACKAGE TYPE
8-PIN PDIP
BLOCK DIAGRAM
Part
Number
V
CC
Range
Max Clock
Frequency
Temp
Ranges
24AA256
24LC256
24C256
100 kHz for V
100 kHz for E temperature range.
1.8-5.5V
2.5-5.5V
4.5-5.5V
< 2.5V.
400 kHz
400 kHz
400 kHz
C,I
C,I
C,I,E
CC
0
°
°
°
C to
C to
C to +125
+70
+85
°
°
°
C
C
C
-40
-40
A0
A1
A2
Vss
Vcc
WP
SCL
SDA
1
2
3
4
8
7
6
5
2
A0
A1
A2
V
SS
V
CC
WP
SCL
SDA
2
1
2
3
4
8
7
6
5
8-PIN SOIC
HV GENERATOR
EEPROM
ARRAY
PAGE LATCHES
YDEC
XDEC
SENSE AMP
R/W CONTROL
MEMORY
CONTROL
LOGIC
I/O
CONTROL
LOGIC
A0…A2
SDA
SCL
V
CC
V
SS
WP
I/O
Write Protect
Circuitry
256K I
I
*24xx256 is used in this document as a generic part number for the 24AA256/24LC256/24C256 devices.
2
C is a trademark of Philips Corporation.
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