Features
• Write Protect Pin for Hardware Data Protection
– Utilizes Different Array Protection Compared to the AT24C04B
• Low-voltage and Standard-voltage Operation
– 1.8 (V
CC
= 1.8V to 5.5V)
• Internally Organized 512 x 8 (4K)
• 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
• 16-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, Tape and Reel, and Bumped Wafers
Description
The AT24HC04B provides 4096 bits of serial electrically erasable and programmable
read-only memory (EEPROM) organized as 512 words of 8 bits each. The device is
optimized for use in many industrial and commercial applications where low-power
and low-voltage operation are essential. The AT24HC04B 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.
Table 0-1. Pin Configuration
Pin Name Function
A1, A2 Address Inputs
SDA Serial Data
SCL Serial Clock Input
WP Write Protect
NC No-connect
Two-wire Serial
EEPROM
4K (512 x 8)
AT24HC04B
5227E–SEEPR–11/08
1
2
3
4
8
7
6
5
NC
A1
A2
GND
VCC
WP
SCL
SDA
8-lead PDIP
1
2
3
4
8
7
6
5
NC
A1
A2
GND
VCC
WP
SCL
SDA
8-lead SOIC
1
2
3
4
8
7
6
5
NC
A1
A2
GND
VCC
WP
SCL
SDA
8-lead TSSOP
