24LC21A-I/SN Microchip Technology, 24LC21A-I/SN Datasheet - Page 14
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24LC21A-I/SN
Manufacturer Part Number
24LC21A-I/SN
Description
IC EEPROM 1KBIT 400KHZ 8SOIC
Manufacturer
Microchip Technology
Specifications of 24LC21A-I/SN
Memory Size
1K (128 x 8)
Package / Case
8-SOIC (3.9mm Width)
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
100kHz, 400kHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Organization
128 K x 8
Interface Type
I2C
Maximum Clock Frequency
0.4 MHz
Access Time
10 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.5 V
Maximum Operating Current
3 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
2.5 V, 5.5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
24LC21A-I/SN
Manufacturer:
MIC
Quantity:
20 000
24LC21A
8.0
8.1
This pin is used to transfer addresses and data into and
out of the device, when the device is in the Bidirectional
mode. In the Transmit-Only mode, which only allows
data to be read from the device, data is also transferred
on the SDA pin. This pin is an open drain terminal,
therefore the SDA bus requires a pull-up resistor to
V
For normal data transfer in the Bidirectional mode, SDA
is allowed to change only during SCL low. Changes
during SCL high are reserved for indicating the Start
and Stop conditions.
8.2
This pin is the clock input for the Bidirectional mode,
and is used to synchronize data transfer to and from the
device. It is also used as the signaling input to switch
the device from the Transmit-Only mode to the
Bidirectional mode. It must remain high for the chip to
continue operation in the Transmit-Only mode.
8.3
This pin is the clock input for the Transmit-Only mode
(DDC1). In the Transmit-Only mode, each bit is clocked
out on the rising edge of this signal. In the Bidirectional
mode, a high logic level is required on this pin to enable
write capability.
DS21160G-page 14
CC
(typical 10 KΩ for 100 kHz, 2 KΩ for 400 kHz).
PIN DESCRIPTIONS
SDA
SCL
VCLK
© 2008 Microchip Technology Inc.