Features
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Low-voltage and Standard-voltage Operation
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– V
CC
= 1.7 to 5.5V
Internally Organized 4096 x 8, 8192 x 8
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bi-directional Data Transfer Protocol
1MHz (5.0V) and 400KHz (1.8V Compatibility)
Write Protect Pin for Hardware Data Protection
32-Byte Page Write Mode (Partial Page Writes Allowed)
Self-Timed Write Cycle (5ms max)
High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
Lead-free/Halogen-free Devices
8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead UDFN, 8-lead XDFN, 5-lead SOT23
and 8-ball VFBGA
Die Sales: Wafer Form, Waffle Pack and Bumped Wafers
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2-Wire Serial
Electrically
Erasable and
Programmable
Read-only
Memory
32K (4096 x 8)
64K (8192 x 8)
Description
The Atmel AT24C32D/64D provides 32,768-/65,536-bits of serial electrically eras-
able and programmable read only memory (EEPROM) organized as 4096/8192 words
of 8-bits each. The device’s cascadable feature allows up to eight devices to share a
common 2-wire bus. The device is optimized for use in many industrial and commer-
cial applications where low power and low voltage operation are essential. The
AT24C32D/64D is available in space saving 8-lead JEDEC SOIC, 8-lead TSSOP, 8-
lead UDFN, 8-lead XDFN, 5-lead SOT23 and 8-ball VFBGA and is accessed via a 2-
wire serial interface. In addition, the entire family operates from 1.7V to 5.5V.
Table 0-1.
Pin Name
A0 - A2
SDA
SCL
WP
Note:
®
Atmel AT24C32D
Atmel AT24C64D
Pin Configurations
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
A0
A1
A2
GND
8-lead SOIC
1
2
3
4
8
7
6
5
8-lead TSSOP
V
CC
WP
SCL
SDA
A0
A1
A2
GND
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
2-Wire, 32K
Serial E
2
PROM
8-lead UDFN
V
CC
8
WP
7
SCL
6
SDA
5
1
A0
2
A1
3
A2
4
GND
8-lead XDFN
V
CC
8
WP
7
SCL
6
SDA
5
1
A0
2
A1
3
A2
4
GND
For use of 5-lead SOT23,
the software A2, A1, and A0
bits in the device address
word must be set to zero to
properly communicate
Bottom View
5-lead SOT23
SCL
GND
SDA
1
2
3
4
5
Bottom View
8-ball VFBGA
WP
V
CC
8
WP
7
SCL
6
V
CC
SDA
5
1
2
3
4
A0
A1
A2
GND
8717B–SEEPR–6/10
Bottom View
ATMEL [ ATMEL CORPORATION ]
