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Atmel Electronic Components Datasheet

AT24HC02B Datasheet

Two-wire Serial EEPROM

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Features
Write Protect Pin for Hardware Data Protection
– Utilizes Different Array Protection Compared to the AT24C02B
Low-voltage and Standard-voltage Operation
– 1.8 (VCC = 1.8V to 5.5V)
Internally Organized 256 x 8 (2K)
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V) and 400 kHz (1.8V, 2.5V, 2.7V) Clock Rate
8-byte Page
Partial Page Writes Allowed
Self-timed Write Cycle (5 ms Max)
High Reliability
– Endurance: One Million Write Cycles
– Data Retention: 100 Years
8-lead PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP Packages
Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
Description
The AT24HC02B provides 2048 bits of serial electrically erasable and programmable
read-only memory (EEPROM) organized as 256 words of 8 bits each. The device is opti-
mized for use in many industrial and commercial applications where low-power and low-
voltage operation are essential. The AT24HC02B is available in space-saving 8-lead
PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a two-wire
serial interface. In addition, the entire family is available in 1.8V (1.8V to 5.5V) version.
Two-wire Serial
EEPROM
2K (256 x 8)
AT24HC02B
Preliminary
Table 1.www.DataSheet4U.com Pin Configuration
Pin Name
Function
A0–A2
Address Inputs
SDA
Serial Data
SCL Serial Clock Input
WP Write Protect
8-lead TSSOP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-lead PDIP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-lead SOIC
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
Rev. 5134C–SEEPR–3/07
1


Atmel Electronic Components Datasheet

AT24HC02B Datasheet

Two-wire Serial EEPROM

No Preview Available !

Absolute Maximum Ratings*
Operating Temperature........................................−40°C to +85°C
Storage Temperature .........................................−65°C to +150°C
Voltage on Any Pin
with Respect to Ground ........................................ −1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age 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.
Figure 1. Block Diagram
START
STOP
LOGIC
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/PAGE ADDRESSES (A2, A1, A0): The A2, A1 and A0 pins are device
address inputs that must be hardwired for the AT24HC02B. As many as eight 2K
devices may be addressed on a single bus system. (Device addressing is discussed in
detail under Device Addressing, page 8).
2 AT24HC02B [Preliminary]
5134C–SEEPR–3/07


Part Number AT24HC02B
Description Two-wire Serial EEPROM
Maker ATMEL Corporation
Total Page 17 Pages
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