AT25080B, AT25160B, AT25320B, and AT25640B
SPI Automotive Temperature Serial EEPROMs
8K (1,024 x 8), 16K (2,048 x 8), 32K (4,096 x 8), 64K (8,192 x 8)
DATASHEET
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
̶
̶
̶
Datasheet Describes Mode 0 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
̶
Low-voltage, Medium-voltage and High-voltage Operation
Extended Temperature Range (Grade 1, 2
(1)
, and 3 as defined in AEC-Q100)
̶
̶
5MHz Clock Rate
32-byte Page Mode
Block Write Protection
̶
Protect 1/4, 1/2, or Entire Array
Write Protect (WP) Pin and Write Disable Instructions for Both Hardware and
Software Data Protection
Self-timed Write Cycle (5ms max)
High Reliability
̶
̶
Endurance: 1,000,000 Write Cycles
Data Retention: 100 Years
1.
Contact Sales for Grade 2 Availability
8-lead JEDEC SOIC, 8-lead TSSOP, and 8-pad UDFN Packages
Note:
Description
The Atmel
®
AT25080B/160B/320B/640B provides 8,192/16,384/32,768/65,536
bits of Serial Electrically-Erasable Programmable Read-Only Memory (EEPROM)
organized as 1,024/2,048/4,096/8,192 words of 8 bits each. The device is
optimized for use in many automotive applications where low-power and
low-voltage operation are essential. AT25080B/160B/320B/640B is available in
space-saving 8-lead JEDEC SOIC, 8-lead TSSOP, and 8-pad UDFN packages.
AT25080B/160B/320B/640B is enabled through the Chip Select pin (CS) and
accessed via a 3-wire interface consisting of Serial Data Input (SI), Serial Data
Output (SO), and Serial Clock (SCK). All programming cycles are completely
self-timed, and no separate erase cycle is required before write.
Block Write protection is enabled by programming the status register with one of
four blocks of write protection. Separate program enable and program disable
instructions are provided for additional data protection. Hardware data protection
is provided via the WP pin to protect against inadvertent write attempts to the
status register. The HOLD pin may be used to suspend any serial communication
without resetting the serial sequence.
Atmel-8803E-SEEPROM-AT25080B-160B-320B-640B-Auto-Datasheet_092016
Ta b le of C o nte nts
1.
2.
3.
4.
5.
Pin Descriptions and Pinouts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute Maximum Ratings*
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Serial Interface Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Memory Organization
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1
5.2
5.3
Pin Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.
7.
8.
Functional Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Timing Diagrams
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.1
Power Recommendation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Ordering Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.1
8.2
Ordering Code Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Code Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.2.1
Automotive Grade 1, V
CC
= 2.5V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.2.2
Automotive Grade 3, V
CC
= 1.7V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.2.3
Legacy Ordering Code Information (Not Recommended for New Designs, NRND) . . . . .
Part Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
17
17
18
19
20
8.3
9.
Packaging Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9.1
9.2
9.3
8S1 — 8-lead JEDEC SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8X — 8-lead TSSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8MA2 — 8-pad UDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10. Revision History
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2
AT25080B/160B/320B/640B Automotive [DATASHEET]
Atmel-8803E-SEEPROM-AT25080B-160B-320B-640B-Auto-Datasheet_092016
1.
Pin Descriptions and Pinouts
Table 1-1.
Pin Name
CS
SCK
SI
SO
GND
V
CC
WP
HOLD
Pin Configurations
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Write Protect
Suspends Serial Input
Note:
Drawings are not to scale.
CS
SO
WP
GND
CS
SO
WP
GND
8-lead SOIC
(Top View)
1
2
3
4
8
7
6
5
8-lead TSSOP
(Top View)
V
CC
HOLD
SCK
SI
CS
SO
WP
GND
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
8-pad UDFN
(Top View)
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
2.
Absolute Maximum Ratings*
Operating Temperature . . . . . . . . . . .-40C 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.
AT25080B/160B/320B/640B Automotive [DATASHEET]
Atmel-8803E-SEEPROM-AT25080B-160B-320B-640B-Auto-Datasheet_092016
3
3.
Block Diagram
Figure 3-1.
Block Diagram
V
CC
GND
Status
Register
Memory Array
1,024/2,048/
4,096/8,192 x 8
Address
Decoder
Data
Register
SI
Mode
Decode
Logic
Output
Buffer
CS
WP
SCK
Clock
Generator
SO
HOLD
4
AT25080B/160B/320B/640B Automotive [DATASHEET]
Atmel-8803E-SEEPROM-AT25080B-160B-320B-640B-Auto-Datasheet_092016
4.
Serial Interface Description
Master:
The device that generates the serial clock.
Slave:
Because the Serial Clock pin (SCK) is always an input, AT25080B/160B/320B/640B always operates as
a slave.
Transmitter/Receiver:
AT25080B/160B/320B/640B has separate pins designated for data transmission (SO)
and reception (SI).
MSB:
The Most Significant Bit (MSB) is the first bit transmitted and received.
Serial Opcode:
After the device is selected with CS going low, the first byte will be received. This byte contains
the opcode that defines the operations to be performed.
Invalid Opcode:
If an invalid opcode is received, no data will be shifted into AT25080B/160B/320B/640B, and
the Serial Output pin (SO) will remain in a high impedance state until the falling edge of CS is detected again.
This will reinitialize the serial communication.
Chip Select:
AT25080B/160B/320B/640B is selected when the CS pin is low. When the device is not selected,
data will not be accepted via the SI pin, and the Serial Output pin (SO) will remain in a high impedance state.
Hold:
The HOLD pin is used in conjunction with the CS pin to select AT25080B/160B/320B/640B. When the
device is selected and a serial sequence is underway, HOLD can be used to pause the serial communication
with the master device without resetting the serial sequence. To pause, the HOLD pin must be brought low while
the SCK pin is low. To resume serial communication, the HOLD pin is brought high while the SCK pin is low
(SCK may still toggle during HOLD). Inputs to the SI pin will be ignored while the SO pin is in the high
impedance state.
Write Protect:
The Write Protect pin (WP) will allow normal read/write operations when held high. When the
WP pin is brought low and WPEN bit is one, all write operations to the status register are inhibited. WP going
low while CS is still low will interrupt a write to the status register. If the internal write cycle has already been
initiated, WP going low will have no effect on any write operation to the status register. The WP pin function is
blocked when the WPEN bit in the status register is zero. This will allow the user to install
AT25080B/160B/320B/640B in a system with the WP pin tied to ground and still be able to write to the status
register. All WP pin functions are enabled when the WPEN bit is set to one.
AT25080B/160B/320B/640B Automotive [DATASHEET]
Atmel-8803E-SEEPROM-AT25080B-160B-320B-640B-Auto-Datasheet_092016
5
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