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24LCS21A/SN Datasheet

  • 24LCS21A/SN

  • SERIAL EEPROM|128X8|CMOS|SOP|8PIN|PLASTIC

  • 17頁

  • ETC

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24LCS21A
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鈩?DDC2鈩?/div>
interface for monitor identification, including
recovery to DDC1
鈥?Low power CMOS technology
- 1 mA typical active current
- 10
碌A(chǔ)
standby current typical at 5.5V
鈥?2-wire serial interface bus, I
2
C鈩?compatible
鈥?100 kHz (2.5V) and 400 kHz (5V) compatibility
鈥?Self-timed write cycle (including auto-erase)
鈥?Hardware write-protect pin
鈥?Page-write buffer for up to eight bytes
鈥?1,000,000 erase/write cycles guaranteed
鈥?Data retention > 200 years
鈥?ESD Protection > 4000V
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 +70擄C
PACKAGE TYPES
PDIP
NC
NC
WP
V
SS
1
24LCS21A
2
3
4
8
7
6
5
V
CC
VCLK
SCL
SDA
SOIC
NC
NC
WP
V
SS
1
24LCS21A
2
3
4
8
7
6
5
V
CC
VCLK
SCL
SDA
DESCRIPTION
The Microchip Technology Inc. 24LCS21A is a 128 x 8-
bit dual-mode 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 imple-
mented: 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 memory array
from 00h to 7Fh, clocked by the VCLK pin. A valid high
to low transition on the SCL pin will cause the device to
enter the transition mode, and look for a valid control
byte on the I
2
C bus. If it detects a valid control byte from
the master, it will switch into Bi-directional Mode, with
byte selectable read/write capability of the memory
array using SCL. If no control byte is received, the
device will revert to the Transmit-Only Mode after it
receives 128 consecutive VCLK pulses while the SCL
pin is idle. The 24LCS21A also enables the user to
write-protect the entire memory array using its write-
protect pin. The 24LCS21A is available in a standard
8-pin PDIP and SOIC package in both commercial and
industrial temperature ranges.
BLOCK DIAGRAM
WP
HV GENERATOR
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
XDEC
EEPROM
ARRAY
PAGE LATCHES
SDA
SCL
YDEC
VCLK
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.
漏
1999 Microchip Technology Inc.
DS21161E-page 1

24LCS21A/SN 產(chǎn)品屬性

  • Microchip

  • 電可擦除可編程只讀存儲(chǔ)器

  • 1 Kbit

  • 128 x 8

  • 200 yr

  • 0.4 MHz

  • 3 mA

  • 2.5 V, 5.5 V

  • + 70 C

  • SMD/SMT

  • SOIC-8

  • 10 ms

  • I2C

  • 0 C

  • Tube

  • 100

  • 5.5 V

  • 2.5 V

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