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24AA02HT 数据表(PDF) 5 Page - Microchip Technology

部件名 24AA02HT
功能描述  2K I2C??Serial EEPROM with Half-Array Write-Protect
PDF  30 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

24AA02HT 数据表(HTML) 5 Page - Microchip Technology

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© 2008 Microchip Technology Inc.
DS22105A-page 5
24AA02H/24LC02BH
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
2.1
A0, A1, A2
The A0, A1 and A2 pins are not used by the 24XX02H.
They may be left floating or tied to either VSS or VCC.
2.2
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.
2.3
Serial Clock (SCL)
The SCL input is used to synchronize the data transfer
to and from the device.
2.4
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. Half of the
memory will be write-protected (80h-FFh). Read
operations are not affected.
Name
PDIP
SOIC
TSSOP
DFN
MSOP
SOT23
SC-70
Description
A0
11
111
—
—
Not Connected
A1
22
222
—
—
Not Connected
A2
33
333
—
—
Not Connected
VSS
44
44422
Ground
SDA
5
5
55533
Serial Address/Data I/O
SCL
6
6
66611
Serial Clock
WP
77
77755
Write-Protect Input
VCC
88
88844
+1.7V to 5.5V Power
Supply



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