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PCA9555N Datasheet(PDF) 3 Page - NXP Semiconductors

Part # PCA9555N
Description  16-bit I2C-bus and SMBus I/O port with interrupt
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9555N Datasheet(HTML) 3 Page - NXP Semiconductors

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PCA9555_8
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 08 — 22 October 2009
3 of 34
NXP Semiconductors
PCA9555
16-bit I2C-bus and SMBus I/O port with interrupt
4.
Block diagram
5.
Pinning information
5.1 Pinning
Remark: All I/Os are set to inputs at reset.
Fig 1.
Block diagram of PCA9555
PCA9555
POWER-ON
RESET
002aac702
I2C-BUS/SMBus
CONTROL
INPUT
FILTER
SCL
SDA
VDD
INPUT/
OUTPUT
PORTS
IO0_0
VSS
8-bit
write pulse
read pulse
IO0_2
IO0_1
IO0_3
IO0_4
IO0_5
IO0_6
IO0_7
INPUT/
OUTPUT
PORTS
IO1_0
8-bit
write pulse
read pulse
IO1_2
IO1_1
IO1_3
IO1_4
IO1_5
IO1_6
IO1_7
INT
A1
A0
A2
LP filter
VDD
Fig 2.
Pin configuration for DIP24
Fig 3.
Pin configuration for SO24
VDD
SDA
SCL
A0
IO1_7
IO1_6
IO1_5
IO1_4
IO1_3
IO1_2
IO1_1
IO1_0
INT
A1
A2
IO0_0
IO0_1
IO0_2
IO0_3
IO0_4
IO0_5
IO0_6
IO0_7
VSS
PCA9555N
002aac697
1
2
3
4
5
6
7
8
9
10
11
12
14
13
16
15
18
17
20
19
22
21
24
23
INT
VDD
A1
SDA
A2
SCL
IO0_0
A0
IO0_1
IO1_7
IO0_2
IO1_6
IO0_3
IO1_5
IO0_4
IO1_4
IO0_5
IO1_3
IO0_6
IO1_2
IO0_7
IO1_1
VSS
IO1_0
PCA9555D
002aac698
1
2
3
4
5
6
7
8
9
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11
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16
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