Philips Semiconductors
Product specification
128 × 8-bit EEPROM with I2C-bus interface
PCA8581; PCA8581C
1
FEATURES
2
GENERAL DESCRIPTION
• Operating supply voltage:
– 4.5 to 5.5 V (PCA8581)
– 2.5 to 6.0 V (PCA8581C)
The PCA8581 and PCA8581C are low power CMOS
EEPROMs with standard and wide operating voltages:
4.5 to 5.5 V (PCA8581)
2.5 to 6.0 V (PCA8581C).
• Integrated voltage multiplier and timer for writing
(no external components required)
In the following text, the generic term ‘PCA8581’ is used to
refer to both types in all packages except when otherwise
specified.
• Automatic erase before write
• Low standby current; maximum 10 µA
• 8-byte page write mode
The PCA8581 is organized as 128 words of 8-bytes.
• Serial input/output bus (I2C-bus)
Addresses and data are transferred serially via a two-line
bidirectional bus (I2C-bus). The built-in word address
register is incremented automatically after each written or
read data byte. All bytes can be read in a single operation.
Up to 8 bytes can be written in one operation, reducing the
total write time per byte. Three address pins, A0, A1 and
A2 are used to define the hardware address, allowing the
use of up to 8 devices connected to the bus without
additional hardware.
• Address by 3 hardware address pins
• Automatic word address incrementing
• Designed for minimum 10000 write cycles per byte
• 10 years minimum non-volatile data retention
• Infinite number of read cycles
• Pin and address compatibility to PCF8570C and
PCF8582
• Operating ambient temperature: −25 to +85 °C.
3
QUICK REFERENCE DATA
SYMBOL
VDD
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
supply voltage
PCA8581
4.5
5.5
V
V
PCA8581C
2.5
−
6.0
IDD
supply current (standby)
operating ambient temperature
storage temperature
fSCL = 0 Hz
10
µA
°C
°C
°C
Tamb
Tstg
−25
−65
−65
+85
+150
+85
without EEPROM retention
with EEPROM retention
4
ORDERING INFORMATION
PACKAGE
TYPE
NUMBER
NAME
DIP8
DIP8
SO8
DESCRIPTION
plastic dual in-line package; 8 leads (300 mil)
plastic dual in-line package; 8 leads (300 mil)
VERSION
SOT97-1
SOT97-1
SOT96-1
SOT96-1
PCA8581P
PCA8581CP
PCA8581T
PCA8581CT
plastic small outline package; 8 leads; body width 3.9 mm
plastic small outline package; 8 leads; body width 3.9 mm
SO8
1997 Apr 02
3
NXP [ NXP ]
