PCA8581T NXP Semiconductors, PCA8581T Datasheet - Page 5

• Manufacturer Part Number: PCA8581T
• Manufacturer: NXP Semiconductors

Specifications of PCA8581T

• Density: 1Kb
• Interface Type: Serial (I2C)
• Organization: 128x8
• Access Time (max): 3.4us
• Frequency (max): 100KHz
• Write Protection: No
• Data Retention: 10Year
• Operating Supply Voltage (typ): 5V
• Package Type: SO
• Operating Temp Range: -25C to 85C
• Supply Current: 1mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
7
The I
between different ICs or modules. The two lines are a
serial data line (SDA) and a serial clock line (SCL). Both
lines must be connected to a positive supply via a pull-up
resistor. Data transfer may be initiated only when the bus
is not busy.
7.2
Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data line, while the
clock is HIGH is defined as the start condition (S). A LOW-to-HIGH transition of the data line while the clock is HIGH is
defined as the stop condition (P).
1997 Apr 02
128
CHARACTERISTICS OF THE I
2
C-bus is for bidirectional, two-line communication
Start and stop conditions
8-bit EEPROM with I
SDA
SCL
START condition
SDA
SCL
S
Fig.4 Definition of START and STOP conditions.
2
C-BUS
2
C-bus interface
data valid
data line
stable;
Fig.3 Bit transfer.
5
allowed
change
of data
7.1
One data bit is transferred during each clock pulse.
The data on the SDA line must remain stable during the
HIGH period of the clock pulse as changes in the data line
at this time will be interpreted as a control signal.
Bit transfer
STOP condition
MBA607
PCA8581; PCA8581C
P
MBA608
SDA
SCL
Product specification