pca9557bs NXP Semiconductors, pca9557bs Datasheet - Page 6

• Manufacturer Part Number: pca9557bs
• Description: 8-bit I2c And Smbus I/0 Port With Reset
• Manufacturer: NXP Semiconductors

NXP Semiconductors
6. System diagram
PCA9557_5
Product data sheet
Fig 7. System diagram
RESET
SDA
SCL
A2
A1
A0
or
or
or
1.1 k
1.6 k
1.6 k
1.1 k
1.1 k
1.1 k
Table 3.
[1]
Symbol
V
IO2
IO3
IO4
IO5
IO6
IO7
RESET
V
SS
DD
HVQFN package die supply ground is connected to both the V
pin must be connected to the supply ground for proper device operation. For enhanced thermal, electrical,
and board-level performance, the exposed pad needs to be soldered to the board using a corresponding
thermal pad on the board, and for proper heat conduction through the board thermal vias need to be
incorporated in the PCB in the thermal pad region.
I
2
C-BUS/SMBus
INTERFACE
LOGIC
Pin description
Pin
SO16, TSSOP16
8
9
10
11
12
13
14
15
16
Rev. 05 — 12 September 2007
INPUT
PORT
…continued
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
INVERSION
POLARITY
HVQFN16
6
7
8
9
10
11
12
13
14
[1]
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
8-bit I
Description
supply ground
input/output 2
input/output 3
input/output 4
input/output 5
input/output 6
input/output 7
active LOW reset input
supply voltage
CONFIG.
2
C-bus and SMBus I/O port with reset
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
SS
pin and the exposed center pad. The V
OUTPUT
PORT
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
PCA9557
© NXP B.V. 2007. All rights reserved.
002aad276
1.1 k
IO0
IO1
IO2
IO3
IO4
IO5
IO6
IO7
6 of 26
SS