AT24C32D and AT24C64D
I
2
C Automotive Temperature Serial EEPROM
32K (4,096 x 8), 64K (8,192 x 8)
DATASHEET
Features
2-Wire Serial Interface Compatible with I
2
C
Internally Organized 4,096 x 8 (32K), 8,192 x 8 (64K)
Low-voltage, Medium-voltage, and High-voltage Operation
̶
̶
Grade 1, V
CC
= 2.5V to 5.5V
Grade 2
(1)
and 3, V
CC
= 1.7V to 5.5V
Grade 1 Temperature Range: -40C to 125C
Grade 2 Temperature Range
(1)
: -40C to 105C
Grade 3 Temperature Range: -40C to 85C
̶
Extended Temperature Range (Grade 1, 2
(1)
, and 3 as defined in AEC-Q100)
̶
̶
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
400kHz Compatibility
Write Protect Pin for Hardware Data Protection
32-byte Page Write Modes
Partial Page Writes are Allowed
Self-timed Write Cycle (5ms max)
High-reliability
̶
̶
Endurance: 1,000,000 Write Cycles
Data Retention: 100 Years
8-lead JEDEC SOIC, 8-lead TSSOP, and 8-pad UDFN Packages
1.
Contact Sales for Grade 2 Availability
Note:
Description
The Atmel
®
AT24C32D/64D provides 32,768/65,536 bits of Serial Electrically
Erasable and Programmable Read-Only Memory (EEPROM) organized as
4,096/8,192 words of 8 bits each. The device is optimized for use in many
automotive applications where low-power and low-voltage operation are essential.
AT24C32D/64D is available in space-saving 8-lead JEDEC SOIC, 8-lead TSSOP,
and 8-pad UDFN packages and is accessed via a 2-wire serial interface. This
device operates from 2.5V to 5.5V (Grade 1) or 1.7V to 5.5V (Grades 2
(1)
and 3).
Atmel-8800D-SEEPROM-AT24C32D-64D-Auto-Datasheet_092016
Ta b le of C o nte nts
1.
2.
3.
4.
5.
Pin Configurations and Pinouts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute Maximum Ratings*
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Memory Organization
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.1
5.2
5.3
Pin Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.
7.
8.
9.
Device Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Device Addressing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Write Operations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Read Operations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.1
Power Recommendation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10. Ordering Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10.1
10.2
Ordering Code Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Code Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.2.1 Automotive Grade 1, V
CC
= 2.5V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.2.2 Automotive Grade 3, V
CC
= 1.7V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
16
16
17
18
10.3
11. Packaging Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
11.1
11.2
11.3
8S1 — 8-lead JEDEC SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8X — 8-lead TSSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8MA2 — 8-pad UDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
12. Revision History
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2
AT24C32D/64D Automotive [DATASHEET]
Atmel-8800D-SEEPROM-AT24C32D-64D-Auto-Datasheet_092016
1.
Pin Configurations and Pinouts
Figure 1.
Pin Name
SDA
SCL
WP
A
0
to A
2
GND
V
CC
Pin Configurations
Function
Serial Data
Serial Clock Input
Write Protect
Address Inputs
Ground
Power Supply
A
0
A
1
A
2
GND
A
0
A
1
A
2
GND
8-lead SOIC
(Top View)
1
2
3
4
8
7
6
5
8-lead TSSOP
(Top View)
V
CC
WP
SCL
SDA
A
0
A
1
A
2
GND
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
8-pad UDFN
(Top View)
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
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.
AT24C32D/64D Automotive [DATASHEET]
Atmel-8800D-SEEPROM-AT24C32D-64D-Auto-Datasheet_092016
3
3.
Block Diagram
Figure 3-1.
Block Diagram
V
CC
GND
WP
SCL
SDA
Start
Stop
Logic
LOAD
Serial
Control
Logic
COMP
LOAD
INC
EN
H.V. Pump/Timing
Device
Address
Comparator
A
2
A
1
A
0
R/W
Data Recovery
Data Word
ADDR/Counter
X DEC
EEPROM
Y DEC
Serial MUX
D
IN
D
OUT
D
OUT
/ACK
Logic
4
AT24C32D/64D Automotive [DATASHEET]
Atmel-8800D-SEEPROM-AT24C32D-64D-Auto-Datasheet_092016
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 (A
2
, A
1
, A
0
):
The A
2
, A
1
, and A
0
pins are device address inputs that are hardwired or left not
connected for hardware compatibility with other Atmel AT24C devices. When the pins are hardwired, as many
as eight 32K/64K devices may be addressed on a single bus system (device addressing is discussed in detail in
Section 7., Device Addressing).
If the pins are left floating, the A
2
, A
1
, and A
0
pins will be internally pulled down
to GND if the capacitive coupling to the circuit board V
CC
plane is < 3pF. If coupling is > 3pF, Atmel recommends
connecting the pin to GND.
Write Protect (WP):
AT24C32D/64D has a Write Protect pin that provides hardware data protection and is
automatically grounded. The Write Protect pin allows normal read/write operations when connected to ground
(GND). When the Write Protect pin is connected to V
CC
, the write protection feature is enabled and operates as
shown in the following table. If WP is left floating, it will be internally pulled down to GND if the capacitive
coupling to the circuit board V
CC
plane is < 3pF. If coupling is > 3pF, Atmel recommends connecting the pin to
GND.
Table 4-1.
Write Protect
Part of the Array Protected
Full (32K/64K) Array
Normal Read/Write Operations
WP Pin Status
At V
CC
At GND
AT24C32D/64D Automotive [DATASHEET]
Atmel-8800D-SEEPROM-AT24C32D-64D-Auto-Datasheet_092016
5
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