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24LC21AT-I-SN

Description
USB Interface IC USB to Basic Serial UART IC QFN-16
Categorystorage   
File Size164KB,19 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
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24LC21AT-I-SN Overview

USB Interface IC USB to Basic Serial UART IC QFN-16

24LC21AT-I-SN Parametric

Parameter NameAttribute value
Product CategoryEEPROM
ManufacturerMicrochip
RoHSDetails
Mounting StyleSMD/SMT
Package / CaseSOIC-8
Memory Size1 kbit
Interface TypeSerial, 2-Wire, I2C
Organization128 x 8
Data Retention200 Year
Maximum Clock Frequency400 kHz
Supply Current - Max3 mA
Operating Supply Voltage2.5 V to 5.5 V
Minimum Operating Temperature- 40 C
Maximum Operating Temperature+ 85 C
PackagingReel
Access Time900 ns
Height1.25 mm (Min)
Length4.9 mm
Operating Supply Current1 mA
Programming Voltage2.5 V to 5.5 V
Factory Pack Quantity3300
Supply Voltage - Max5.5 V
Supply Voltage - Min2.5 V
Width3.9 mm
Unit Weight0.019048 oz
24LC21A
1K 2.5V Dual Mode I
2
C
Serial EEPROM
Features
• Single supply with operation down to 2.5V
• Completely implements DDC1™/DDC2™
interface for monitor identification, including
recovery to DDC1
• Pin and function compatible with 24LC21
• Low-power CMOS technology
- 1 mA typical active current
- 10
µA
standby current typical at 5.5V
• 2-wire serial interface bus, I
2
C™ compatible
• 100 kHz (2.5V) and 400 kHz (5V) compatibility
• Self-timed write cycle (including auto-erase)
• Page write buffer for up to eight bytes
• 1,000,000 erase/write cycles ensured
• Data retention > 200 years
• ESD Protection > 4000V
• 8-pin PDIP and SOIC package
• Available for extended temperature ranges
- Commercial (C):
0°C to +70°C
- Industrial (I):
-40°C to +85°C
Package Types
PDIP
NC
NC
NC
V
SS
SOIC
NC
NC
NC
Vss
1
24LC21A
2
3
4
8
7
6
5
Vcc
VCLK
SCL
SDA
1
24LC21A
2
3
4
8
7
6
5
Vcc
VCLK
SCL
SDA
Block Diagram
HV Generator
Description
The Microchip Technology Inc. 24LC21A 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 informa-
tion. Two modes of operation have been implemented:
Transmit-only mode and Bidirectional 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 Bidirectional 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
24LC21A is available in a standard 8-pin PDIP and
SOIC package in both commercial and industrial
temperature ranges.
I/O
Control
Logic
Memory
Control
Logic
XDEC
EEPROM
Array
Page Latches
SDA
SCL
YDEC
VCLK
Sense AMP
R/W Control
V
CC
V
SS
Pin Function Table
Name
V
SS
SDA
SCL
VCLK
V
CC
NC
Function
Ground
Serial Address/Data I/O
Serial Clock (Bidirectional mode)
Serial Clock (Transmit-only mode)
+2.5V to 5.5V Power Supply
No Connection
DDC is a trademark of the Video Electronics Standards
Association.
I
2
C is a trademark of Philips Corporation.
2003 Microchip Technology Inc.
DS21160F-page 1

24LC21AT-I-SN Related Products

24LC21AT-I-SN 24LC21A-I-P 24LC21AT-SN
Description USB Interface IC USB to Basic Serial UART IC QFN-16 Multilayer Ceramic Capacitors MLCC - SMD/SMT 0805 47uF 10volts X5R +/-20% Standard LEDs - Through Hole Red Diffused 635nm 3.4mcd
Product Category EEPROM EEPROM EEPROM
Manufacturer Microchip Microchip Microchip
RoHS Details Details Details
Mounting Style SMD/SMT Through Hole SMD/SMT
Package / Case SOIC-8 PDIP-8 SOIC-8
Memory Size 1 kbit 1 kbit 1 kbit
Interface Type Serial, 2-Wire, I2C Serial, 2-Wire, I2C Serial, 2-Wire, I2C
Organization 128 x 8 128 x 8 128 x 8
Data Retention 200 Year 200 Year 200 Year
Maximum Clock Frequency 400 kHz 400 kHz 400 kHz
Supply Current - Max 3 mA 3 mA 3 mA
Operating Supply Voltage 2.5 V to 5.5 V 2.5 V to 5.5 V 2.5 V to 5.5 V
Minimum Operating Temperature - 40 C - 40 C 0 C
Maximum Operating Temperature + 85 C + 85 C + 70 C
Access Time 900 ns 10 ms 10 ms
Height 1.25 mm (Min) 3.3 mm 1.25 mm (Min)
Length 4.9 mm 9.27 mm 4.9 mm
Operating Supply Current 1 mA 3 mA 1 mA
Programming Voltage 2.5 V to 5.5 V 2.5 V to 5.5 V 2.5 V to 5.5 V
Factory Pack Quantity 3300 60 3300
Supply Voltage - Max 5.5 V 5.5 V 5.5 V
Supply Voltage - Min 2.5 V 2.5 V 2.5 V
Width 3.9 mm 6.35 mm 3.9 mm
Unit Weight 0.019048 oz 0.032805 oz 0.019048 oz
Packaging Reel Tube Cut Tape
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