Not recommended for new designs –
Please use 25AA160A/B or 25LC160A/B.
25AA160/25LC160/25C160
16K SPI
™
Bus Serial EEPROM
Device Selection Table
Part
Number
25AA160
25LC160
25C160
V
CC
Range
1.8-5.5V
2.5-5.5V
4.5-5.5V
Max Clock
Frequency
1 MHz
2 MHz
3 MHz
Temp
Ranges
I
I
I,E
Description:
The Microchip Technology Inc. 25AA160/25LC160/
25C160 (25XX160
*
) are 16 Kbit Serial Electrically
Erasable PROMs. The memory is accessed via a
simple Serial Peripheral Interface™ (SPI™) compati-
ble serial bus. The bus signals required are a clock
input (SCK) plus separate 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.
Features:
• Low-power CMOS technology:
- Write current: 3 mA maximum
- Read current: 500
µA
typical
- Standby current: 500 nA typical
• 2048 x 8-bit organization
• 16 byte page
• Write cycle time: 5 ms max.
• Self-timed erase and write cycles
• 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
• Sequential read
• High reliability:
- Endurance: 1 M cycles
- Data retention: > 200 years
- ESD protection: > 4000V
• 8-pin PDIP and SOIC packages
• Temperature ranges supported:
- Industrial (I):
- Automotive (E) (25C160):
-40°C to +85°C
-40°C to +125°C
Package Types
PDIP/SOIC
CS
SO
WP
V
SS
1
25XX160
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
Block Diagram
Status
Register
HV Generator
I/O Control
Logic
Memory
Control
Logic
X
Dec
EEPROM
Array
Page Latches
SI
SO
CS
SCK
HOLD
WP
*25XX160 is used in this document as a generic part number
for the 25AA160/25LC160/25C160 devices
.
SPI™ is a trademark of Motorola Inc
.
V
CC
V
SS
Y Decoder
Sense Amp.
R/W Control
2004 Microchip Technology Inc.
DS21231D-page 1
25AA160/25LC160/25C160
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
(†)
V
CC
.............................................................................................................................................................................7.0V
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 125°C
Soldering temperature of leads (10 seconds) .......................................................................................................+300°C
ESD protection on all pins ......................................................................................................................................... 4 KV
† NOTICE: Stresses above those listed under “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.
1.1
DC Characteristics
Industrial (I):
T
A
= -40°C to +85°C V
CC
= 1.8V to 5.5V
Automotive (E): T
A
= -40°C to +125°C V
CC
= 4.5V to 5.5V (25C160 only)
Min.
2.0
0.7 V
CC
-0.3
-0.3
—
—
V
CC
-0.5
-10
-10
—
Max.
V
CC
+1
V
CC
+1
0.8
0.3 V
CC
0.4
0.2
—
10
10
7
Units
V
V
V
V
V
V
V
µA
µA
pF
Conditions
V
CC
≥
2.7V
(Note)
V
CC
< 2.7V
(Note)
V
CC
≥
2.7V
(Note)
V
CC
< 2.7V
(Note)
I
OL
= 2.1 mA
I
OL
= 1.0 mA, V
CC
< 2.5V
I
OH
= -400
µA
CS = V
CC
, V
IN
= V
SS TO
V
CC
CS = V
CC
, V
OUT
= V
SS TO
V
CC
T
A
= 25°C, CLK = 1.0 MHz,
V
CC
= 5.0V
(Note)
V
CC
= 5.5V; F
CLK
= 3.0 MHz;
SO = Open
V
CC
= 2.5V; F
CLK
= 2.0 MHz;
SO = Open
V
CC
= 5.5V
V
CC
= 2.5V
CS = V
CC
= 5.5V, Inputs tied to V
CC
or
V
SS
CS = V
CC
= 2.5V, Inputs tied to V
CC
or
V
SS
DC CHARACTERISTICS
Param.
No.
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
Sym.
V
IH1
V
IH2
V
IL1
V
IL2
V
OL
V
OL
V
OH
I
LI
I
LO
C
INT
Characteristics
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)
Operating Current
D11
I
CC
Read
—
—
1
500
mA
µA
D12
D13
I
CC
Write
I
CCS
Standby Current
—
—
—
—
5
3
5
1
mA
mA
µA
µA
Note:
This parameter is periodically sampled and not 100% tested.
DS21231D-page 2
2004 Microchip Technology Inc.
25AA160/25LC160/25C160
1.2
AC Characteristics
Industrial (I):
Automotive (E):
Characteristic
Clock Frequency
Min.
—
—
—
100
250
500
150
250
475
500
30
50
50
50
100
100
—
—
150
230
475
150
230
475
50
50
Clock
—
—
—
0
—
—
—
100
100
200
100
100
200
100
150
200
100
150
200
—
1M
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
Max.
3
2
1
—
—
—
—
—
—
—
—
—
—
—
—
—
2
2
—
—
—
—
—
—
—
—
150
230
475
—
200
250
500
—
—
—
—
—
—
—
—
—
—
—
—
5
—
Units
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
E/W
Cycles
V
CC
= 1.8V to 5.5V
V
CC
= 4.5V to 5.5V (25C160 only)
Conditions
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
—
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
(Note 1)
(Note 1)
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
—
—
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
(Note 1)
V
CC
= 4.5V to 5.5V
(Note 1)
V
CC
= 2.5V to 4.5V
(Note 1)
V
CC
= 1.8V to 2.5V
(Note 1)
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
V
CC
= 4.5V to 5.5V
(Note 1)
V
CC
= 2.5V to 4.5V
(Note 1)
V
CC
= 1.8V to 2.5V
(Note 1)
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 4.5V
V
CC
= 1.8V to 2.5V
—
(Note 2)
AC CHARACTERISTICS
Param.
No.
1
Sym.
F
CLK
2
T
CSS
CS Setup Time
3
T
CSH
CS Hold Time
4
5
T
CSD
T
SU
CS Disable Time
Data Setup Time
6
T
HD
Data Hold Time
7
8
9
T
R
T
F
T
HI
CLK Rise Time
CLK Fall Time
Clock High Time
10
T
LO
Clock Low Time
11
12
13
T
CLD
T
CLE
T
V
Clock Delay Time
Clock Enable Time
Output Valid from
Low
Output Hold Time
Output Disable Time
14
15
T
HO
T
DIS
16
T
HS
HOLD Setup Time
17
T
HH
HOLD Hold Time
18
T
HZ
HOLD Low to Output High-
Z
HOLD High to Output Valid
19
T
HV
20
21
T
WC
—
Internal Write Cycle Time
Endurance
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.
2004 Microchip Technology Inc.
DS21231D-page 3
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