1
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
128-byte Page Mode Only for Write Operations
Low-voltage and Standard-voltage Operation
2.7 (V
CC
= 2.7V to 5.5V)
1.8 (V
CC
= 1.8V to 5.5V)
10 MHz (5V), 5MHz (2.7V) and 2 MHz (1.8V) Clock Rate
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
High Reliability
Endurance: 100K Write Cycles
Data Retention: >40 Years
8-lead PDIP, 8-lead EIAJ SOIC, 16-lead JEDEC SOIC and 8-lead Leadless Array Package
Description
The AT25HP256/512 provides 262,144/524,288 bits of serial electrically erasable pro-
grammable read only memory (EEPROM) organized as 32,768/65,536 words of 8-bits
each. The device is optimized for use in many industrial and commercial applications
where high-speed, low-power, and low-voltage operation are essential. The
AT25HP256/512 is available in a space saving 8-lead PDIP (AT25HP256/512), 8-lead
EIAJ SOIC (AT25HP256), 16-lead JEDEC SOIC (AT25HP512) and 8-lead Leadless
Rev. 1113HSEEPR3/03
SPI Serial
EEPROMs
256K (32,768 x 8)
512K (65,536 x 8)
AT25HP256
AT25HP512
Pin Configurations
Pin Name
Function
CS
Chip Select
SCK
Serial Data Clock
SI
Serial Data Input
SO
Serial Data Output
GND
Ground
VCC
Power Supply
WP
Write Protect
HOLD
Suspends Serial Input
(continued)
8-lead SOIC
C S
S C K
S O
W P
H O L D
G N D
V C C
1
2
3
4
8
7
6
5
S I
8-lead PDIP
C S
S C K
S O
W P
H O L D
G N D
V C C
1
2
3
4
8
7
6
5
S I
8-lead Leadless Array
Bottom View
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
WP
GND
16-lead SOIC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CS
SO
NC
NC
NC
NC
WP
GND
VCC
HOLD
NC
NC
NC
NC
SCK
SI
2
AT25HP256/512
1113HSEEPR3/03
Array (AT25HP256/512) packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V)
versions.
The AT25HP256/512 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 top , top or entire array of write protec-
tion. 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.
Figure 1. Block Diagram
Absolute Maximum Ratings*
Operating Temperature.................................. -55
C to +125C
*NOTICE:
Stresses beyond those listed under "Absolute Maxi-
mum 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 condi-
tions beyond those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect device reliability.
Storage Temperature ..................................... -65
C to +150C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
32,768/65,536 x 8
3
AT25HP256/512
1113HSEEPR3/03
Note:
1. This parameter is characterized and is not 100% tested.
Note:
1. V
IL
and V
IH
max are reference only and are not tested.
Pin Capacitance
(1)
Applicable over recommended operating range from T
A
= 25
C, f = 1.0 MHz, V
CC
= +5.0V (unless otherwise noted).
Symbol
Test Conditions
Max
Units
Conditions
C
OUT
Output Capacitance (SO)
8
pF
V
OUT
= 0V
C
IN
Input Capacitance (CS, SCK, SI, WP, HOLD)
6
pF
V
IN
= 0V
DC Characteristics
Applicable over recommended operating range from: T
AI
= -40
C to +85C, V
CC
= +1.8V to +5.5V,
T
AC
= 0
C to +70C, V
CC
= +1.8V to +5.5V (unless otherwise noted).
Symbol
Parameter
Test Condition
Min
Typ
Max
Units
V
CC1
Supply Voltage
1.8
3.6
V
V
CC2
Supply Voltage
2.7
5.5
V
V
CC3
Supply Voltage
4.5
5.5
V
I
CC1
Supply Current
V
CC
= 5.0V at 5 MHz, SO = Open Read
6.0
10.0
mA
I
CC2
Supply Current
V
CC
= 5.0V at 5 MHz, SO = Open Write
4.0
7.0
mA
I
SB1
Standby Current
V
CC
= 1.8V, CS = V
CC
0.1
2.0
A
I
SB2
Standby Current
V
CC
= 2.7V, CS = V
CC
0.2
2.0
A
I
SB3
Standby Current
V
CC
= 5.0V, CS = V
CC
2.0
5.0
A
I
IL
Input Leakage
V
IN
= 0V to V
CC
-3.0
3.0
A
I
OL
Output Leakage
V
IN
= 0V to V
CC
, T
AC
= 0
C to 70C
-3.0
3.0
A
V
IL
(1)
Input Low Voltage
-0.6
V
CC
x 0.3
V
V
IH
(1)
Input High Voltage
V
CC
x 0.7
V
CC
+ 0.5
V
V
OL1
Output Low Voltage
4.5V
V
CC
5.5V
I
OL
= 3.0 mA
0.4
V
V
OH1
Output High Voltage
I
OH
= -1.6 mA
V
CC
- 0.8
V
V
OL2
Output Low Voltage
1.8V
V
CC
3.6V
I
OL
= 0.15 mA
0.2
V
V
OH2
Output High Voltage
I
OH
= -100 A
V
CC
- 0.2
V
4
AT25HP256/512
1113HSEEPR3/03
AC Characteristics
Applicable over recommended operating range from T
A
= -40
C to +85C, V
CC
= As Specified,
C
L
= 1 TTL Gate and 30 pF (unless otherwise noted).
Symbol
Parameter
Voltage
Min
Max
Units
f
SCK
SCK Clock Frequency
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
10
5
2
MHz
t
RI
Input Rise Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
2
2
2
s
t
FI
Input Fall Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
2
2
2
s
t
WH
SCK High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
40
80
200
ns
t
WL
SCK Low Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
40
80
200
ns
t
CS
CS High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
50
100
250
ns
t
CSS
CS Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
50
100
250
ns
t
CSH
CS Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
50
100
250
ns
t
SU
Data In Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
12
20
50
ns
t
H
Data In Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
10
20
50
ns
t
HD
Hold Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
25
50
100
ns
t
CD
Hold Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
25
50
100
ns
t
V
Output Valid
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
40
80
200
ns
t
HO
Output Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
ns
5
AT25HP256/512
1113HSEEPR3/03
Note:
1. This parameter is characterized and is not 100% tested.
t
LZ
Hold to Output Low Z
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
100
200
300
ns
t
HZ
Hold to Output High Z
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
100
200
300
ns
t
DIS
Output Disable Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
100
100
250
ns
t
WC
Write Cycle Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
10
10
10
ms
Endurance
(1)
5.0V, 25
C, Page Mode
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
100K
Write Cycles
AC Characteristics (Continued)
Applicable over recommended operating range from T
A
= -40
C to +85C, V
CC
= As Specified,
C
L
= 1 TTL Gate and 30 pF (unless otherwise noted).
Symbol
Parameter
Voltage
Min
Max
Units
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