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24LC02B 数据表(PDF) 11 Page - Microchip Technology

部件名 24LC02B
功能描述  2K I2C Serial EEPROM
PDF  24 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

24LC02B 数据表(HTML) 11 Page - Microchip Technology

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 2003 Microchip Technology Inc.
DS21709C-page 11
24AA02/24LC02B
8.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 8-1.
TABLE 8-1:
PIN FUNCTION TABLE
8.1
Serial Address/Data Input/Output
(SDA)
SDA is a bidirectional pin used to transfer addresses
and data into and out of the device. Since it is an open-
drain terminal, the SDA bus requires a pull-up resistor
to VCC (typical 10 k
Ω for 100 kHz, 2 kΩ for 400 kHz).
For normal data transfer, SDA is allowed to change
only during SCL low. Changes during SCL high are
reserved for indicating Start and Stop conditions.
8.2
Serial Clock (SCL)
The SCL input is used to synchronize the data transfer
to and from the device.
8.3
Write-Protect (WP)
The WP pin must be connected to either VSS or VCC.
If tied to VSS, normal memory operation is enabled
(read/write the entire memory
00-FF).
If tied to VCC, write operations are inhibited. The entire
memory will be write-protected. Read operations are
not affected.
This feature allows the user to use the 24XX02 as a
serial ROM when WP is enabled (tied to VCC).
8.4
A0, A1, A2
These A0, A1 and A2 pins are not used by the 24XX02.
They may be left floating or tied to either VSS or VCC.
Name
PDIP
SOIC
TSSOP
MSOP
SOT23
Description
A0
1
1
1
1
—
Not Connected
A1
2
2
2
2
—
Not Connected
A2
3
3
3
3
—
Not Connected
VSS
44
442
Ground
SDA
5
5
5
5
3
Serial Address/Data I/O
SCL
6
6
6
6
1
Serial Clock
WP
7
7
7
7
5
Write-Protect Input
VCC
8
8
8
8
4
+1.8V to 5.5V Power Supply



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