EEPROM. AT24CM01 Datasheet

AT24CM01 Datasheet PDF

Part AT24CM01
Description Serial EEPROM
Feature AT24CM01; AT24CM01 I2C-Compatible (2-wire) Serial EEPROM 1-Mbit (131,072 x 8) DATASHEET Features  Low Voltage.
Manufacture Atmel
Datasheet
Download AT24CM01 Datasheet




AT24CM01
AT24CM01
I2C-Compatible (2-wire) Serial EEPROM
1-Mbit (131,072 x 8)
DATASHEET
Features
Low Voltage and Standard Voltage Operation Available
̶ 1.7V (VCC = 1.7V to 5.5V)
̶ 2.5V (VCC = 2.5V to 5.5V)
Internally Organized 131,072 x 8
2-wire Serial Interface
Schmitt Triggers, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
400kHz (1.7V) and 1MHz (5V, 2.5V) Compatibility
Write Protect Pin for Hardware Data Protection
256-byte Page Write Mode
̶ Partial Page Writes Allowed
Random and Sequential Read Modes
Self-timed Write Cycle (5ms Max)
High Reliability
̶ Endurance: 1,000,000 Write Cycles
̶ Data Retention: 40 Years
Green Package Options (Pb/Halide-free/RoHS Compliant)
̶ 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead TSSOP, and 8-ball WLCSP
Die Sale Options: Wafer Form and Tape and Reel Available
Description
The Atmel® AT24CM01 provides 1,048,576 bits of Serial Electrically Erasable and
Programmable Read-Only Memory (EEPROM) organized as 131,072 words of
8 bits each. The device’s cascadable feature allows up to four devices to share a
common 2-wire bus. The device is optimized for use in many industrial and
commercial applications where low power and low voltage operation are
essential. The devices are available in space-saving 8-lead JEDEC SOIC, 8-lead
EIAJ SOIC, 8-lead TSSOP, and 8-ball WLCSP. In addition, the entire family is
available in 1.7V (1.7V to 5.5V) and 2.5V (2.5V to 5.5V) versions.
Atmel-8812F-SEEPROM-AT24CM01-Datasheet_012015



AT24CM01
1. Pin Configurations and Pinouts
Pin Name
NC
A1
A2
GND
SDA
SCL
WP
VCC
Function
No Connect
Address Input
Address Input
Ground
Serial Data
Serial Clock Input
Write Protect
Power Supply
8-lead SOIC
8-lead TSSOP
NC 1
A1
2
A2
3
GND 4
8
VCC
NC
1
7
WP
A1
2
6
SCL
A2
3
5
SDA
GND
4
8
VCC
7
WP
6
SCL
5
SDA
Top View
Top View
8-ball WLSCP
VCC WP NC
SCL A1
SDA A2 GND
Top View
Note: Drawings are not to scale.
2. Absolute Maximum Ratings*
Operating Temperature . . . . . . . . . . .-55C to +125C
Storage Temperature . . . . . . . . . . . . .-65C to +150C
Voltage on any pin
with respect to ground . . . . . . . . . . . . . -1.0V to +7.0V
Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V
DC Output Current . . . . . . . . . . . . . . . . . . . . . . .5.0mA
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage
to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
2
AT24CM01 [DATASHEET]
Atmel-8812F-SEEPROM-AT24CM01-Datasheet_012015



AT24CM01
3. Block Diagram
VCC
GND
WP
SCL
SDA
A2
A1
Start
Stop
Logic
LOAD
Device
Address
Comparator
R/W
Serial
Control
Logic
COMP
LOAD INC
EN H.V. Pump/Timing
Data Recovery
Data Word
Addr/counter
EEPROM
DIN
DOUT
Y DEC
Serial MUX
DOUT/ACK
Logic
4. Pin Description
Serial Clock (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative
edge clock data out of each device.
Serial Data (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open drain driven and may be
wire-ORed with any number of other open drain or open collector devices.
Device Addresses (A2 and A1): The A2 and A1 pins are device address inputs that can be hardwired or left not
connected for hardware compatibility with other Atmel AT24Cxx devices. When the A2 and A1 pins are
hardwired, as many as four 1-Mbit devices may be addressed on a single bus system (See “Device Addressing”
on page 9. for more details). If the A2 and A1 pins are left floating, the A2 and A1 pin will be internally pulled down
to GND if the capacitive coupling to the circuit board VCC plane is <3pF. If coupling is >3pF, Atmel recommends
connecting the A2 and A1 pin to GND.
Write Protect (WP): The Write Protect input, when connected to GND, allows normal write operations. When
WP is connected high to VCC, all write operations to the memory are inhibited. If the pin is left floating, the WP
pin will be internally pulled down to GND if the capacitive coupling to the circuit board VCC plane is <3pF. If
coupling is >3pF, Atmel recommends connecting the pin to GND. Switching WP to VCC prior to a write operation
creates a software write protect function.
Table 4-1. Write Protect
WP Pin Status
At VCC
At GND
Part of the Array Protected
Full Array
Normal Read/Write Operations
AT24CM01 [DATASHEET]
3
Atmel-8812F-SEEPROM-AT24CM01-Datasheet_012015







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