PCA9555_15 Datasheet, PDF (1/42 Pages) Texas Instruments – SMBus I/O Expander With Interrupt Output

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PCA9555
SCPS131F – AUGUST 2005 – REVISED JUNE 2014
PCA9555 Remote 16-Bit I²C and SMBus I/O Expander With Interrupt Output and
Configuration Registers
1 Features
•1 Low Standby-Current Consumption of 1 μA Max
• I²C to Parallel Port Expander
• Open-Drain Active-Low Interrupt Output
• 5-V Tolerant I/O Ports
• Compatible With Most Microcontrollers
• 400-kHz Fast I²C Bus
• Address by Three Hardware Address Pins for Use
of up to Eight Devices
• Polarity Inversion Register
• Latched Outputs With High-Current Drive
Capability for Directly Driving LEDs
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
2 Description
This 16-bit I/O expander for the two-line bidirectional
bus (I²C) is designed for 2.3-V to 5.5-V V_CC
operation. It provides general-purpose remote I/O
expansion for most microcontroller families via the I²C
interface [serial clock (SCL), serial data (SDA)].
The PCA9555 consists of two 8-bit Configuration
(input or output selection), Input Port, Output Port,
and Polarity Inversion (active high or active low
operation) registers. At power on, the I/Os are
configured as inputs. The system master can enable
the I/Os as either inputs or outputs by writing to the
I/O configuration bits. The data for each input or
output is kept in the corresponding Input or Output
register. The polarity of the Input Port register can be
inverted with the Polarity Inversion register. All
registers can be read by the system master.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PCA9555
SSOP (16)
VQFN (16)
6.20 mm × 5.30 mm
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
RGE PACKAGE
(TOP VIEW)
INT ¹
A1 ²
A2 ³
P00 ⁴
P01 ⁵
P02 ⁶
P03 ⁷
P04 ⁸
P05 ⁹
P06 ¹⁰
P07 ¹¹
GND ¹²
24 _VCC
23 _SDA
22 _SCL
21 _A0
20 _P17
19 _P16
18 _P15
17 _P14
16 _P13
15 _P12
14 _P11
13 _P10
24 23 22 21 20 19
P00 1
18 A0
P01 2
17 P17
P02 3
16 P16
P03 4
15 P15
P04 5
14 P14
P05 6
13 P13
7 8 9 10 11 12
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.