1
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
10 MHz Clock Rate
128-Byte Page Mode Only for Write Operations
Low-Voltage and Standard-Voltage Operation
5.0 (V
CC
= 4.5V to 5.5V)
2.7 (V
CC
= 2.7V to 5.5V)
1.8 (V
CC
= 1.8V to 3.6V)
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
ESD Protection: > 3000V
8-Pin PDIP, 8-Pin EIAJ SOIC, and 8-Pin 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-pin PDIP (AT25HP256/512), 8-pin
EIAJ SOIC (AT25HP256), and 8-pin Leadless Array (AT25HP256/512) packages. In
Rev. 1113B07/98
SPI Serial
EEPROMs
256K (32,768 x 8)
512K (65,536 x 8)
AT25HP256
AT25HP512
Preliminary
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-Pin 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-Pin 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-Pin Leadless Array
Bottom View
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
WP
GND
AT25HP256/512
2
addition, the entire family is available in 5.0V (4.5V to
5.5V), 2.7V (2.7V to 5.5V), and 1.8V (1.8V to 3.6V) ver-
sions.
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 pro-
tection. Separate program enable and program disable
instructions are provided for additional data protection.
Hardware data protection is provided via the WP pin to pro-
tect against inadvertent write attempts to the status regis-
ter. The HOLD pin may be used to suspend any serial
communication without resetting the serial sequence.
*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.
Block Diagram
Absolute Maximum Ratings*
Operating Temperature .................................. -55
C to +125
C
Storage Temperature ..................................... -65
C to +150
C
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
AT25HP256/512
3
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).
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 +85
C, V
CC
= +1.8V to +5.5V,
T
AC
= 0
C to +70
C, 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 70
C
-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
AT25HP256/512
4
AC Characteristics
Applicable over recommended operating range from T
A
= -40
C to +85
C, 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 - 3.6
0
0
0
10
5
TBD
MHz
t
RI
Input Rise Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
2
2
TBD
s
t
FI
Input Fall Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
2
2
TBD
s
t
WH
SCK High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
40
80
TBD
ns
t
WL
SCK Low Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
40
80
TBD
ns
t
CS
CS High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
50
100
TBD
ns
t
CSS
CS Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
50
100
TBD
ns
t
CSH
CS Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
50
100
TBD
ns
t
SU
Data In Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
12
20
TBD
ns
t
H
Data In Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
10
20
TBD
ns
t
HD
Hold Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
25
50
TBD
ns
t
CD
Hold Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
25
50
TBD
ns
t
V
Output Valid
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
0
0
0
40
80
TBD
ns
t
HO
Output Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
0
0
0
ns
AT25HP256/512
5
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 - 3.6
0
0
0
100
200
TBD
ns
t
HZ
Hold to Output High Z
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
100
200
TBD
ns
t
DIS
Output Disable Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
100
100
TBD
ns
t
WC
Write Cycle Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
5
10
TBD
ms
Endurance
(1)
5.0V, 25
C, Page Mode
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
100K
Write
Cycles
AC Characteristics (Continued)
Applicable over recommended operating range from T
A
= -40
C to +85
C, 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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