24AA64-I/MS Microchip Technology, 24AA64-I/MS Datasheet - Page 5

• Manufacturer Part Number: 24AA64-I/MS
• Description: IC EEPROM 64KBIT 400KHZ 8MSOP
• Manufacturer: Microchip Technology

Specifications of 24AA64-I/MS

• Memory Size: 64K (8K x 8)
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 100kHz, 400kHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Memory Configuration: 8K X 8
• Ic Interface Type: I2C
• Clock Frequency: 400kHz
• Supply Voltage Range: 1.7V To 5.5V
• Memory Case Style: MSOP
• No. Of Pins: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 24AA64I/MS

2.0
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
2.1
The A0, A1 and A2 inputs are used by the 24XX64 for
multiple device operation. The 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 V
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 device, the chip
address pins must be driven to logic ‘0’ or logic ‘1’
before normal device operation can proceed. Address
pins are not available in the SOT-23 or Chip Scale
packages.
2.2
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 V
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.
 2010 Microchip Technology Inc.
Name PDIP SOIC TSSOP
SDA
SCL
V
V
WP
A0
A1
A2
Note 1: The exposed pad on the DFN/TDFN packages can be connected to V
SS
CC
CC
(typical 10 k for 100 kHz, 2 kfor 400 kHz).
PIN DESCRIPTIONS
A0, A1, A2 Chip Address Inputs
Serial Data (SDA)
1
2
3
4
5
6
7
8
PIN FUNCTION TABLE
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Rotated
TSSOP
CC
3
4
5
6
7
8
1
2
or V
DFN
SS
1
2
3
4
5
6
7
8
.
(1)
TDFN
24AA64/24LC64/24FC64
1
2
3
4
5
6
7
8
(1)
MSOP SOT-23
2.3
The SCL input is used to synchronize the data transfer
from and to the device.
2.4
This pin must be connected to either V
to V
write operations are inhibited but read operations are
not affected.
3.0
The 24XX64 supports a bidirectional, 2-wire bus and
data transmission protocol. A device that sends data
onto the bus is defined as transmitter, while a device
receiving data is defined as a receiver. The bus has to
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
24XX64 works as slave. Both master and slave can
operate as transmitter or receiver, but the master
device determines which mode is activated.
1
2
3
4
5
6
7
8
SS
, write operations are enabled. If tied to V
Serial Clock (SCL)
Write-Protect (WP)
FUNCTIONAL DESCRIPTION
—
—
—
2
3
1
5
4
CS
—
—
—
SS
2
5
4
3
1
or left floating.
Chip Address Input
Chip Address Input
Chip Address Input
Ground
Serial Address/Data I/O
Serial Clock
Write-Protect Input
+1.7V to 5.5V Power Supply
Description
DS21189R-page 5
SS
or V
CC
. If tied
CC
,