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24FC512 Datasheet(PDF) 5 Page - Microchip Technology

Part # 24FC512
Description  512K I2C??CMOS Serial EEPROM
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

24FC512 Datasheet(HTML) 5 Page - Microchip Technology

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© 2005 Microchip Technology Inc.
DS21754G-page 5
24AA512/24LC512/24FC512
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 and A2 Chip Address
Inputs
The A0, A1 and A2 inputs are used by the 24XX512 for
multiple device operations. The logic levels on these
inputs are compared with the corresponding bits in the
slave address. The chip is selected if the compare is
true.
Up to eight devices may be connected to the same bus
by using different Chip Select bit combinations. These
inputs must be connected to either VCC or VSS.
In most applications, the chip address inputs A0, A1
and A2 are hard-wired to logic ‘0’ or logic ‘1’. For
applications in which these pins are controlled by a
microcontroller or other programmable logic device,
the chip address pins must be driven to logic ‘0’ or logic
‘1’ before normal device operation can proceed.
2.2
Serial Data (SDA)
This is a bidirectional pin used to transfer addresses
and data into and data out of the device. It is an open-
drain terminal, therefore, the SDA bus requires a pull-
up resistor to VCC (typical 10 k
Ω for 100 kHz, 2 kΩ for
400kHz and 1MHz).
For normal data transfer, SDA is allowed to change
only during SCL low. Changes during SCL high are
reserved for indicating the Start and Stop conditions.
2.3
Serial Clock (SCL)
This input is used to synchronize the data transfer from
and to the device.
2.4
Write-Protect (WP)
This pin must be connected to either VSS or VCC. If tied
to VSS, write operations are enabled. If tied to VCC,
write operations are inhibited but read operations are
not affected.
3.0
FUNCTIONAL DESCRIPTION
The 24XX512 supports a bidirectional 2-wire bus and
data transmission protocol. A device that sends data
onto the bus is defined as a transmitter and a device
receiving data as a receiver. The bus must be
controlled by a master device which generates the
Serial Clock (SCL), controls the bus access and
generates the Start and Stop conditions, while the
24XX512 works as a slave. Both master and slave
can operate as a transmitter or receiver, but the
master device determines which mode is activated.
Name
PDIP
SOIC
14-lead
TSSOP
DFN
Function
A0
1
1
1
1
User Configured Chip Select
A1
2
2
2
2
User Configured Chip Select
(NC)
3, 4, 5
Not Connected
A2
3
3
6
3
User Configured Chip Select
VSS
4
4
7
4
Ground
SDA
5
5
8
5
Serial Data
SCL
6
6
9
6
Serial Clock
(NC)
10, 11, 12
Not Connected
WP
7
7
13
7
Write-Protect Input
VCC
8
8
14
8
+1.8V to 5.5V (24AA512)
+2.5V to 5.5V (24LC512)
+2.5V to 5.5V (24FC512)


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