24FC256-I/ST Microchip Technology, 24FC256-I/ST Datasheet - Page 5
![IC EEPROM 256KBIT 1MHZ 8TSSOP](/photos/6/59/65937/c04-086_st_sml.jpg)
24FC256-I/ST
Manufacturer Part Number
24FC256-I/ST
Description
IC EEPROM 256KBIT 1MHZ 8TSSOP
Manufacturer
Microchip Technology
Specifications of 24FC256-I/ST
Memory Size
256K (32K x 8)
Package / Case
8-TSSOP
Operating Temperature
-40°C ~ 85°C
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
400kHz, 1MHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
1.7 V ~ 5.5 V
Organization
32 K x 8
Interface Type
2-Wire
Maximum Clock Frequency
1 MHz
Access Time
5 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.8 V
Maximum Operating Current
3 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
1.8 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
Other names
24FC256I/ST
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
24FC256-I/ST
Manufacturer:
MCP
Quantity:
1 402
Company:
Part Number:
24FC256-I/ST
Manufacturer:
MICROCHIP
Quantity:
12 000
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 24XX256 for
multiple device operations. The levels on these inputs
are compared with the corresponding bits in the slave
address. The chip is selected if the compare is true.
For the MSOP package only, pins A0 and A1 are not
connected.
Up to eight devices (two for the MSOP package) may
be connected to the same bus by using different Chip
Select bit combinations. If these pins are left
unconnected, the inputs will be pulled down internally
to V
pull-down circuitry is disabled.
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.
2.2
This is a bidirectional pin used to transfer addresses
and data into and out of the device. It is an open drain
terminal. Therefore, the SDA bus requires a pull-up
resistor to V
400 kHz and 1 MHz).
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.
2004 Microchip Technology Inc.
A0
A1
(NC)
A2
V
SDA
SCL
(NC)
WP
V
SS
CC
SS
Name
. If they are tied to V
PIN DESCRIPTIONS
A0, A1, A2 Chip Address Inputs
Serial Data (SDA)
CC
8-pin
PDIP
(typical 10 k
PIN FUNCTION TABLE
—
—
1
2
3
4
5
6
7
8
CC
8-pin
SOIC
—
—
1
2
3
4
5
6
7
8
or driven high, the internal
for 100 kHz, 2 k
TSSOP
8-pin
—
—
1
2
3
4
5
6
7
8
24AA256/24LC256/24FC256
10, 11, 12
TSSOP
14-pin
3, 4, 5
for
13
14
1
2
6
7
8
9
MSOP
8-pin
1, 2
2.3
This input is used to synchronize the data transfer to
and from the device.
2.4
This pin can be connected to either V
floating. Internal pull-down circuitry on this pin will keep
the device in the unprotected state if left floating. If tied
to V
enabled (read/write the entire memory 0000-7FFF).
If tied to V
operations are not affected.
3.0
The 24XX256 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
24XX256 works as a slave. Both master and slave can
operate as a transmitter or receiver, but the master
device determines which mode is activated.
—
—
—
3
4
5
6
7
8
SS
or left floating, normal memory operation is
8-pin
Serial Clock (SCL)
Write-Protect (WP)
FUNCTIONAL DESCRIPTION
DFN
—
—
1
2
3
4
5
6
7
8
CC
, write operations are inhibited. Read
User Configurable Chip Select
User Configurable Chip Select
Not Connected
User Configurable Chip Select
Ground
Serial Data
Serial Clock
Not Connected
Write-Protect Input
+1.8V to 5.5V (24AA256)
+2.5V to 5.5V (24LC256)
+1.8V to 5.5V (24FC256)
Function
DS21203M-page 5
SS
, V
CC
or left