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
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•
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SPI Serial
EEPROMs
256K (32,768 x 8)
512K (65,536 x 8)
•
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
(continued)
AT25HP256
AT25HP512
Preliminary
Pin Configurations
Pin Name
CS
SCK
SI
SO
GND
VCC
WP
HOLD
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Write Protect
Suspends Serial Input
8-Pin PDIP
CS
SO
WP
GND
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
WP
GND
8-Pin SOIC
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
8-Pin Leadless Array
VCC
HOLD
SCK
SI
8
7
6
5
1
2
3
4
CS
SO
WP
GND
Rev. 1113B–07/98
Bottom View
1
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 ¼, top ½ 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.
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
*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
32,768/65,536 x 8
2
AT25HP256/512
AT25HP256/512
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
C
OUT
C
IN
Note:
Output Capacitance (SO)
Input Capacitance (CS, SCK, SI, WP HOLD)
,
1. This parameter is characterized and is not 100% tested.
Max
8
6
Units
pF
pF
Conditions
V
OUT
= 0V
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
V
CC1
V
CC2
V
CC3
I
CC1
I
CC2
I
SB1
I
SB2
I
SB3
I
IL
I
OL
V
IL(1)
V
IH(1)
V
OL1
V
OH1
V
OL2
V
OH2
Note:
Parameter
Supply Voltage
Supply Voltage
Supply Voltage
Supply Current
Supply Current
Standby Current
Standby Current
Standby Current
Input Leakage
Output Leakage
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output Low Voltage
Output High Voltage
4.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
≤
3.6V
I
OL
= 3.0 mA
I
OH
= -1.6 mA
I
OL
= 0.15 mA
I
OH
= -100
µA
V
CC
- 0.2
V
CC
- 0.8
0.2
V
CC
= 5.0V at 5 MHz, SO = Open Read
V
CC
= 5.0V at 5 MHz, SO = Open Write
V
CC
= 1.8V, CS = V
CC
V
CC
= 2.7V, CS = V
CC
V
CC
= 5.0V, CS = V
CC
V
IN
= 0V to V
CC
V
IN
= 0V to V
CC
, T
AC
= 0°C to 70°C
-3.0
-3.0
-0.6
V
CC
x 0.7
Test Condition
Min
1.8
2.7
4.5
6.0
4.0
0.1
0.2
2.0
Typ
Max
3.6
5.5
5.5
10.0
7.0
2.0
2.0
5.0
3.0
3.0
V
CC
x 0.3
V
CC
+ 0.5
0.4
Units
V
V
V
mA
mA
µA
µA
µA
µA
µA
V
V
V
V
V
V
1. V
IL
and V
IH
max are reference only and are not tested.
3
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
f
SCK
Parameter
SCK Clock Frequency
Voltage
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
40
80
TBD
40
80
TBD
50
100
TBD
50
100
TBD
50
100
TBD
12
20
TBD
10
20
TBD
25
50
TBD
25
50
TBD
0
0
0
0
0
0
40
80
TBD
Min
0
0
0
Max
10
5
TBD
2
2
TBD
2
2
TBD
Units
MHz
t
RI
Input Rise Time
µs
t
FI
Input Fall Time
µs
t
WH
SCK High Time
ns
t
WL
SCK Low Time
ns
t
CS
CS High Time
ns
t
CSS
CS Setup Time
ns
t
CSH
CS Hold Time
ns
t
SU
Data In Setup Time
ns
t
H
Data In Hold Time
ns
t
HD
Hold Setup Time
ns
t
CD
Hold Hold Time
ns
t
V
Output Valid
ns
t
HO
Output Hold Time
ns
4
AT25HP256/512
AT25HP256/512
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
t
LZ
Parameter
Hold to Output Low Z
Voltage
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
100K
Min
0
0
0
Max
100
200
TBD
100
200
TBD
100
100
TBD
5
10
TBD
Units
ns
t
HZ
Hold to Output High Z
ns
t
DIS
Output Disable Time
ns
t
WC
Write Cycle Time
ms
Endurance
(1)
Note:
5.0V, 25°C, Page Mode
Write
Cycles
1. This parameter is characterized and is not 100% tested.
5
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