25AA02UID
2K SPI Bus Serial EEPROM with Unique 32-Bit Serial Number
Device Selection Table
Part Number
25AA02UID
V
CC
Range
1.8-5.5V
Page Size
16 Bytes
Temp. Ranges
I
Packages
SN, OT
Unique ID Length
32-Bit
Features:
• Preprogrammed 32-Bit Serial Number:
- Unique across all UID-family EEPROMs
- Scalable to 48-bit, 64-bit, 128-bit, 256-bit,
and other lengths
• 10 MHz max. Clock Frequency
• Low-Power CMOS Technology:
- Max. write current: 5 mA at 5.5V
- Read current: 5 mA at 5.5V, 10 MHz
- Standby current: 1
A
at 2.5V
• 256 x 8-Bit Organization
• Write Page mode (up to 16 bytes)
• Sequential Read
• Self-Timed Erase and Write Cycles (5 ms max.)
• Block Write Protection:
- Protect none, 1/4, 1/2 or all of array
• Built-in Write Protection:
- Power-on/off data protection circuitry
- Write enable latch
- Write-protect pin
• High Reliability:
- Endurance: 1,000,000 erase/write cycles
- Data retention: >200 years
- ESD protection: >4000V
• Temperature Ranges Supported:
- Industrial (I):
-40C to +85C
• RoHS Compliant
Description:
The Microchip Technology Inc. 25AA02UID is a 2 Kbit
Serial Electrically Erasable Programmable Read-Only
Memory (EEPROM) with a preprogrammed, 32-bit
unique ID. The memory is accessed via a simple Serial
Peripheral Interface (SPI) compatible serial bus. The
bus signals required are a clock input (SCK) plus sep-
arate data in (SI) and data out (SO) lines. Access to the
device is controlled through a Chip Select (CS) input.
Communication to the device can be paused via the
hold pin (HOLD). While the device is paused, transi-
tions on its inputs will be ignored, with the exception of
Chip Select, allowing the host to service higher priority
interrupts.
The 25AA02UID is available in the standard 8-lead
SOIC and 6-lead SOT-23 packages.
Pin Function Table
Name
CS
SO
WP
V
SS
SI
SCK
HOLD
V
CC
Function
Chip Select Input
Serial Data Output
Write-Protect
Ground
Serial Data Input
Serial Clock Input
Hold Input
Supply Voltage
Package Types (not to scale)
SOT-23
(OT)
SCK
V
SS
SI
1
2
3
6
5
4
V
DD
CS
SO
SOIC
(SN)
CS
SO
WP
V
SS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
2013 Microchip Technology Inc.
DS20005205A-page 1
25AA02UID
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
(†)
V
CC
.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. V
SS
......................................................................................................... -0.6V to V
CC
+1.0V
Storage temperature .................................................................................................................................-65°C to 150°C
Ambient temperature under bias .................................................................................................................-40°C to 85°C
ESD protection on all pins ..........................................................................................................................................4 kV
†
NOTICE: Stresses above 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 those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an
extended period of time may affect device reliability.
TABLE 1-1:
Param.
No.
D001
D002
D003
D004
D005
D006
D007
D008
D009
DC CHARACTERISTICS
Industrial (I):
Min.
0.7 V
CC
-0.3
-0.3
—
—
V
CC
-0.5
—
—
—
T
A
= -40°C to +85°C
Max.
V
CC
+1
0.3 V
CC
0.2 V
CC
0.4
0.2
—
±1
±1
7
Units
V
V
V
V
V
V
A
A
pF
V
CC
2.7V
(Note
1)
V
CC
< 2.7V
(Note
1)
I
OL
= 2.1 mA
I
OL
= 1.0 mA, V
CC
< 2.5V
I
OH
= -400
A
CS = V
CC
, V
IN
= V
SS
or V
CC
CS = V
CC
, V
OUT
= V
SS
or V
CC
T
A
= 25°C, CLK = 1.0 MHz,
V
CC
= 5.0V
(Note
1)
V
CC
= 5.5V; F
CLK
= 10.0 MHz;
SO = Open
V
CC
= 2.5V; F
CLK
= 5.0 MHz;
SO = Open
V
CC
= 5.5V
V
CC
= 2.5V
CS = V
CC
= 2.5V, Inputs tied to V
CC
or
V
SS
, T
A
= +85°C
V
CC
= 1.8V to 5.5V
Test Conditions
DC CHARACTERISTICS
Sym.
V
IH1
V
IL1
V
IL2
V
OL
V
OL
V
OH
I
LI
I
LO
C
INT
Characteristic
High-level Input
voltage
Low-level Input
Voltage
Low-level Output
Voltage
High-level Output
Voltage
Input Leakage
Current
Output Leakage
Current
Internal Capacitance
(all inputs and
outputs)
D010
I
CC
Read
Operating Current
—
—
—
—
Standby Current
—
5
2.5
5
3
1
mA
mA
mA
mA
A
D011
D012
Note:
I
CC
Write
I
CCS
This parameter is periodically sampled and not 100% tested.
DS20005205A-page 2
2013 Microchip Technology Inc.
25AA02UID
TABLE 1-2:
AC CHARACTERISTICS (CONTINUED)
Industrial (I):
Min.
20
40
80
30
60
160
30
60
160
—
1M
T
A
= -40°C to +85°C
Max.
—
—
—
—
—
—
—
—
—
5
—
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
V
CC
= 1.8V to 5.5V
Test Conditions
4.5V
V
CC
5.5V
2.5V
V
CC
4.5V
1.8V
V
CC
2.5V
4.5V
V
CC
5.5V
(Note
1)
2.5V
V
CC
4.5V
(Note
1)
1.8V
V
CC
2.5V
(Note
1)
4.5V
V
CC
5.5V
2.5V
V
CC
4.5V
1.8V
V
CC
2.5V
(Note
3)
AC CHARACTERISTICS
Param.
Sym.
No.
17
T
HH
Characteristic
HOLD Hold Time
18
T
HZ
HOLD Low to Output
High-Z
HOLD High to Output
Valid
Internal Write Cycle Time
(byte or page)
Endurance
19
T
HV
20
21
T
WC
—
E/W 25°C, V
CC
= 5.5V
(Note
2)
Cycles
Note 1:
This parameter is periodically sampled and not 100% tested.
2:
This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site
at www.Microchip.com.
3:
T
WC
begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle
is complete.
TABLE 1-3:
AC Waveform:
V
LO
= 0.2V
AC TEST CONDITIONS
—
(Note
1)
(Note
2)
—
0.5 V
CC
0.5 V
CC
V
HI
= V
CC
- 0.2V
V
HI
= 4.0V
C
L
= 100 pF
Timing Measurement Reference Level
Input
Output
Note 1:
For V
CC
4.0V.
2:
For V
CC
4.0V.
DS20005205A-page 4
2013 Microchip Technology Inc.
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