MAX7317 Maxim, MAX7317 Datasheet - Page 4

• Manufacturer Part Number: MAX7317
• Description: The MAX7317 serial-interfaced peripheral provides microprocessors with 10 I/O ports rated to 7V
• Manufacturer: Maxim

10-Port SPI-Interfaced I/O Expander with
Overvoltage and Hot-Insertion Protection
(T
4
3–7, 9–13
A
QSOP
15
12
= +25°C, unless otherwise noted.)
_______________________________________________________________________________________
9
6
3
0
14
15
16
—
1
2
8
0
PIN
1–5, 7–11
PORT SINK CURRENT
2
vs. PORT VOLTAGE
QFN
PAD
15
16
12
13
14
PORT VOLTAGE (V)
6
T
T
A
A
T
T
4
A
A
= -40°C
= +25°C
= +85°C
= +125°C
Exposed
NAME
P0–P9
DOUT
SCLK
GND
DIN
pad
CS
V+
6
Serial-Clock Input. On SCLK’s rising edge, data shifts into the internal shift register. On
SCLK’s falling edge, data is clocked out of DOUT. SCLK is active only while CS is low.
Chip-Select Input. Serial data is loaded into the shift register while CS is low. The most recent
16 bits of data latch on CS’s rising edge.
I/O Ports. P0 to P9 can be configured as open-drain, current-sink outputs rated at 20mA
maximum, or as CMOS inputs, or as open-drain outputs. Loads should be connected to a
supply voltage no higher than 7V.
Ground
Serial-Data Output. The data into DIN is valid at DOUT 15.5 clock cycles later. Use this pin to
daisy-chain several devices or allow data readback. Output is push-pull.
Serial-Data Input. Data from DIN loads into the internal 16-bit shift register on SCLK’s rising
edge.
Positive Supply Voltage. Bypass V+ to GND with a 0.047µF ceramic capacitor.
Exposed Pad on Package Underside. Connect to GND.
8
1.0
0.9
0.8
0.7
0.6
0.5
0.4
-40
-25
-10 5 20
V+ = 2.7V
STANDBY CURRENT
vs. TEMPERATURE
TEMPERATURE (°C)
35 50 65 80 95 110 125
V+ = 3.3V
V+ = 2.25V
Typical Operating Characteristics
V+ = 3.6V
FUNCTION
0.5
0.4
0.3
0.2
0.1
0
-40
-25
V+ = 3.3V
V+ = 2.7V
-10 5 20
SUPPLY CURRENT (I+)
Pin Description
vs. TEMPERATURE
TEMPERATURE (°C)
35 50 65 80 95 110 125
V+ = 2.25V
V+ = 3.6V