AT34C02-10PU-1.8 ATMEL [ATMEL Corporation], AT34C02-10PU-1.8 Datasheet
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AT34C02-10PU-1.8
Manufacturer Part Number
AT34C02-10PU-1.8
Description
Two-wire Serial EEPROM with Permanent Software Write Protect
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT34C02-10PU-1.8.pdf
(21 pages)
Features
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Description
The AT34C02 provides 2048 bits of serial electrically-erasable and programmable
read only memory (EEPROM) organized as 256 words of 8 bits each. The first-half of
the device incorporates a software write protection feature while hardware write pro-
tection for the entire array is available via an external pin as well. Once the software
write protection is enabled, by sending a special command to the device, it cannot be
reversed. The hardware write protection is controlled with the WP pin and can be used
to protect the entire array, whether or not the software write protection has been
enabled. This allows the user to protect none, first-half, or all of the array depending
on the application. The device is optimized for use in many industrial and commercial
applications where low-power and low-voltage operations are essential. The AT34C02
is available in space saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead MAP, 8-lead
TSSOP and 8-ball dBGA2 packages and is accessed via a two-wire serial interface. In
addition, it is available in 1.8V (1.8V to 5.5V) versions.
Table 1. Pin Configurations
Pin Name
A0 - A2
SDA
SCL
WP
Permanent Software Write Protection for the First-half of the Array
Hardware Write Protection for the Entire Array
Low-voltage Operation
Internally Organized 256 x 8
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
100 kHz (1.8V) and 400 kHz (2.7V and 5.0V) Compatibility
16-byte Page Write Modes
Partial Page Writes Are Allowed
Self-timed Write Cycle (5 ms max)
High-reliability
Automotive Grade Devices Available
8-lead PDIP, 8-lead JEDEC SOIC, 8-lead MAP, 8-lead TSSOP, and 8-ball dBGA2
Packages
Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
– Software Procedure to Verify Write Protect Status
– 1.8 (V
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
GND
A0
A1
A2
8-lead TSSOP
1
2
3
4
CC
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
= 1.8V to 5.5V)
8
7
6
5
VCC
WP
SCL
SDA
GND
A0
A1
A2
GND
A0
A1
A2
8-lead PDIP
8-lead SOIC
1
2
3
4
1
2
3
4
8
7
6
5
8
7
6
5
VCC
WP
SCL
SDA
VCC
WP
SCL
SDA
VCC
SDA
SCL
WP
Bottom View
VCC
SDA
SCL
8-lead MAP
WP
8-ball dBGA2
8
7
6
5
Bottom View
8
7
6
5
1
2
3
4
1
2
3
4
A0
A1
A2
GND
A0
A1
A2
GND
Two-wire Serial
EEPROM
with Permanent
Software Write
Protect
2K (256 x 8)
AT34C02
Note:
Not recommended for new
design; please refer to
AT34CO2C datasheet.
Rev. 0958Q–SEEPR–1/07
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