PCF8574P NXP Semiconductors, PCF8574P Datasheet - Page 9

PCF8574P

Manufacturer Part Number
PCF8574P
Description
Manufacturer
NXP Semiconductors
Datasheet

Specifications of PCF8574P

Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Operating Temperature (max)
85C
Package Type
PDIP
Rad Hardened
No
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PCF8574P
Manufacturer:
TI
Quantity:
1 870
Part Number:
PCF8574P
Manufacturer:
PHI
Quantity:
20
Part Number:
PCF8574P
Manufacturer:
NXP
Quantity:
16
Part Number:
PCF8574P
Manufacturer:
NXP
Quantity:
1 916
Part Number:
PCF8574P
Manufacturer:
PHI
Quantity:
1 000
Part Number:
PCF8574P
Manufacturer:
NXP
Quantity:
7 616
Part Number:
PCF8574P-3
Manufacturer:
AFATECH
Quantity:
16 725
Part Number:
PCF8574PWR
Manufacturer:
LT
Quantity:
7 600
Part Number:
PCF8574PWR
Manufacturer:
TI
Quantity:
595
Part Number:
PCF8574PWRG4
Manufacturer:
PHILIPS
Quantity:
3 700
Philips Semiconductors
7
7.1
For addressing see Figs 10, 11 and 12.
Each of the PCF8574’s eight I/Os can be independently used as an input or output. Input data is transferred from the
port to the microcontroller by the READ mode (see Fig.12). Output data is transmitted to the port by the WRITE mode
(see Fig.11).
2002 Nov 22
handbook, full pagewidth
handbook, full pagewidth
Remote 8-bit I/O expander for I
FUNCTIONAL DESCRIPTION
Addressing
S
write pulse
data from
shift register
power-on
reset
read pulse
data to
shift register
0
1
a. PCF8574.
slave address
0
0
Fig.10 PCF8574 and PCF8574A slave addresses.
Fig.9 Simplified schematic diagram of each I/O.
A2
A1
D
C I
FF
S
A0
Q
2
0
C-bus
A
D
C I
FF
S
9
Q
S
0
1
100
A
b. PCF8574A.
1
slave address
1
A2
MBD977
A1
A0
P0 to P7
to interrupt
V DD
V SS
logic
0
Product specification
MBD973
A
PCF8574

Related parts for PCF8574P