19-2698; Rev 0; 1/03
2-Wire-Interfaced 8-Bit I/O Port Expander
with Reset
General Description
The MAX7310 provides 8-bit parallel input/output port
expansion for SMBus鈩?compatible and I
2
C-compatible
applications. The MAX7310 consists of an input port
register, an output port register, a polarity inversion reg-
ister, a configuration register, a bus timeout register,
and an SMBus/I
2
C-compatible serial interface. The sys-
tem master can invert the MAX7310 input data by writ-
ing to the active-high polarity inversion register. The
system master can enable or disable bus timeout by
writing to the bus timeout register.
Any of the eight I/O ports may be configured as input or
output. An active-low reset input sets the eight I/Os as
inputs. Three address select pins configure one of 56
slave ID addresses.
The MAX7310 is available in 16-pin thin QFN, TSSOP,
and QSOP packages and is specified over the -40掳C to
+125掳C automotive temperature range.
o
400kHz 2-Wire Interface
o
2.3V to 5.5V Operation
o
Low Standby Current (1.7碌A typ)
o
Bus Timeout for Lock-Up-Free Operation
o
56 Slave ID Addresses
o
Polarity Inversion
o
Eight I/O Pins that Default to Inputs on Power-Up
o
5V Tolerant Open-Drain Output on I/O0
o
4mm x 4mm, 0.8mm Thin QFN Package
o
-40掳C to +125掳C Operation
Features
MAX7310
Applications
Servers
RAID Systems
Industrial Control
Medical Equipment
Instrumentation, Test Measurement
PART
MAX7310AUE
MAX7310AEE
MAX7310ATE
Ordering Information
TEMP RANGE
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
PIN-PACKAGE
16 TSSOP
16 QSOP
16 Thin QFN
SMBus is a trademark of Intel Corp.
Pin Configurations
SDA
V+
14
TOP VIEW
SCL
1
SDA
2
AD0
3
AD1
4
AD2
5
I/O0
6
I/O1
7
GND
8
16
V+
15
RESET
14
I/O7
13
I/O6
AD1
AD2
I/O0
2
3
4
AD0
1
16
15
SCL
13
RESET
12
I/O7
11
I/O6
10
I/O5
9
I/O4
8
I/O3
MAX7310
12
I/O5
11
I/O4
10
I/O3
9
I/O2
MAX7310
5
I/01
6
GND
7
I/O2
TSSOP/QSOP
THIN QFN
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.