Datasheet

DESCRIPTION/ORDERING INFORMATION (CONTINUED)
PCA9538
SCPS126E – SEPTEMBER 2006 – REVISED JUNE 2008 ................................................................................................................................................ www.ti.com
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the
remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via
the I
2
C bus. Thus, the PCA9538 can remain a simple slave device.
The device outputs (latched) have high-current drive capability for directly driving LEDs. It has low current
consumption.
Two hardware pins (A0 and A1) are used to program and vary the fixed I
2
C address and allow up to four devices
to share the same I
2
C bus or SMBus.
ORDERING INFORMATION
T
A
PACKAGE
(1) (2)
ORDERABLE PART NUMBER TOP-SIDE MARKING
QFN – RGT Reel of 3000 PCA9538RGTR ZWZ
QFN – RGV Reel of 2500 PCA9538RGVR PREVIEW
QSOP – DBQ Reel of 2500 PCA9538DBQR PD538
Tube of 40 PCA9538DW
SOIC – DW PCA9538
Reel of 2000 PCA9538DWR
– 40 ° C to 85 ° C
Reel of 2000 PCA9538DBR
SSOP – DB PD538
Tube of 80 PCA9538DB
Tube of 90 PCA9538PW
TSSOP – PW PD538
Reel of 2000 PCA9538PWR
TVSOP – DGV Reel of 2000 PCA9538DGVR PD538
(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging .
(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com .
TERMINAL FUNCTIONS
NO.
QSOP (DBQ),
NAME DESCRIPTION
SSOP (DB), QFN (RGT) OR
TSSOP (PW), OR QFN (RGV)
TVSOP (DGV)
1 15 A0 Address input. Connect directly to V
CC
or ground.
2 16 A1 Address input. Connect directly to V
CC
or ground.
Active-low reset input. Connect to V
CC
through a pullup resistor if no active
3 1 RESET
connection is used.
4 2 P0 P-port input/output. Push-pull design structure.
5 3 P1 P-port input/output. Push-pull design structure.
6 4 P2 P-port input/output. Push-pull design structure.
7 5 P3 P-port input/output. Push-pull design structure.
8 6 GND Ground
9 7 P4 P-port input/output. Push-pull design structure.
10 8 P5 P-port input/output. Push-pull design structure.
11 9 P6 P-port input/output. Push-pull design structure.
12 10 P7 P-port input/output. Push-pull design structure.
13 11 INT Interrupt output. Connect to V
CC
through a pullup resistor.
14 12 SCL Serial clock bus. Connect to V
CC
through a pullup resistor.
15 13 SDA Serial data bus. Connect to V
CC
through a pullup resistor.
16 14 V
CC
Supply voltage
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