PCA8581P NXP Semiconductors, PCA8581P Datasheet - Page 7

• Manufacturer Part Number: PCA8581P
• Manufacturer: NXP Semiconductors

Specifications of PCA8581P

• 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: PDIP
• 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: Through Hole
• Pin Count: 8
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
7.5
Before any data is transmitted on the I
always carried out with the first byte transmitted after the start procedure. The I
PCA8581 WRITE and READ cycles is shown in Figs 7, 9 and 10.
After the word address, one-to-eight data bytes can be sent. The address is automatically incremented, but the four
highest address bits (row) are internally latched. Therefore all bytes are written in the same row.
An example of writing eight bytes with word address X 0 0 0 0 0 0 0 and six bytes with word address X 0 0 1 0 1 0 1 is
shown in Fig.8.
1997 Apr 02
handbook, full pagewidth
handbook, full pagewidth
128
(1) X = don’t care.
I
2
C-bus protocol
8-bit EEPROM with I
S
SLAVE ADDRESS
Word Address
X0000000
X0001...
X0010101
X0011...
Fig.8 Writing eight and six bytes with different word addresses.
Fig.7 Master transmits to slave receiver (WRITE) mode.
acknowledgement
R/W don't
from slave
(1)
0 A X
2
column
C-bus, the device which should respond is addressed first. The addressing is
care
0
1
2
3
Row
2
WORD ADDRESS
C-bus interface
1
4
0
2
5
1
acknowledgement
from slave
3
6
2
7
A
4
3
n bytes
DATA
5
4
memory word address
auto increment
acknowledgement
6
1
5
from slave
2
C-bus configuration for the different
A
7
2
6
PCA8581; PCA8581C
P
MLB890
8
7
3
WRITING
t WR
Product specification
MLB889