PCAL9555AHF,128 NXP Semiconductors, PCAL9555AHF,128 Datasheet - Page 19

• Manufacturer Part Number: PCAL9555AHF,128
• Description: Interface - I/O Expanders
• Manufacturer: NXP Semiconductors

Specifications of PCAL9555AHF,128

• Rohs: yes
• Maximum Operating Frequency: 100 kHz
• Operating Supply Voltage: 1.65 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: HWQFN-24
• Operating Current: 160 mA
• Output Current: 25 mA
• Power Dissipation: 200 mW
• Product Type: I/O Expanders

Fig 12. Read input port register (latch enabled), scenario 3
data into port 0
data into port 1
SDA
read from port 0
read from port 1
INT
SCL
S
START condition
Remark: Transfer of data can be stopped at any moment by a STOP condition. When this occurs, data present at the latest acknowledge phase is valid (output mode). It
is assumed that the command byte has previously been set to ‘00’ (read input port register).
1
0
2
1
slave address
3
t
v(INT)
0
4
0 A2 A1 A0 1
5
6
acknowledge
from slave
7
R/W
8
9
A
DATA 10
t
rst(INT)
DATA 01
DATA 01
I0.x
acknowledge
from master
A
t
h(D)
DATA 10
DATA 02
DATA 11
I1.x
t
acknowledge
su(D)
from master
A
A
DATA 10
DATA 01
DATA 02
I0.x
acknowledge
from master
A
DATA 11
I1.x
non acknowledge
from master
STOP condition
002aah429
1
P