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24LC21/P Datasheet

  • 24LC21/P

  • I2C Serial EEPROM

  • 16頁

  • ETC

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24LC21
1K 2.5V Dual Mode I
2
C
鈩?/div>
Serial EEPROM
FEATURES
鈥?Single supply with operation down to 2.5V
鈥?Completely implements DDC1餂?DDC2餂?inter-
face for monitor identification
鈥?Low power CMOS technology
- 1 mA active current typical
- 10
碌A
standby current typical at 5.5V
鈥?2-wire serial interface bus, I
2
C餂?compatible
鈥?Self-timed write cycle (including auto-erase)
鈥?Page-write buffer for up to 8 bytes
鈥?100 kHz (2.5V) and 400 kHz (5V) compatibility
鈥?Factory programming (QTP) available
鈥?1,000,000 erase/write cycles ensured
鈥?Data retention > 200 years
鈥?8-pin PDIP and SOIC package
鈥?Available for extended temperature ranges
- Commercial (C):
0擄C to +70擄C
- Industrial (I):
-40擄C to +85擄C
PACKAGE TYPES
PDIP
NC
NC
NC
V
SS
1
2
3
4
8
7
6
5
V
CC
V
CLK
SCL
SDA
24LC21
SOIC
1
2
3
4
8
7
5
5
NC
NC
NC
V
SS
V
CC
V
CLK
SCL
SDA
24LC21
DESCRIPTION
The Microchip Technology Inc. 24LC21 is a 128 x 8 bit
Electrically Erasable PROM. This device is designed
for use in applications requiring storage and serial
transmission of configuration and control information.
Two modes of operation have been implemented:
Transmit Only Mode and Bi-Directional Mode. Upon
power-up, the device will be in the Transmit Only Mode,
sending a serial bit stream of the entire memory array
contents, clocked by the V
CLK
pin. A valid high to low
transition on the SCL pin will cause the device to enter
the Bi-Directional Mode, with byte selectable read/write
capability of the memory array. The 24LC21 is available
in a standard 8-pin PDIP and SOIC package in both
commercial and industrial temperature ranges.
BLOCK DIAGRAM
V
CLK
HV GENERATOR
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
XDEC
EEPROM
ARRAY
PAGE LATCHES
SDA
SCL
YDEC
V
CC
V
SS
SENSE AMP
R/W CONTROL
DDC is a trademark of the Video Electronics Standards Association.
I
2
C is a trademark of Philips Corporation.
餂?/div>
2001 Microchip Technology Inc.
DS21095H-page 1

24LC21/P 產(chǎn)品屬性

  • Microchip

  • 電可擦除可編程只讀存儲器

  • 1 Kbit

  • 128 x 8

  • 200 yr

  • 0.4 MHz

  • 3 mA

  • 2.5 V, 5.5 V

  • + 70 C

  • Through Hole

  • PDIP-8

  • 10 ms

  • I2C

  • 0 C

  • Tube

  • 60

  • 5.5 V

  • 2.5 V

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