MAX7325 Maxim, MAX7325 Datasheet - Page 6

• Manufacturer Part Number: MAX7325
• Description: The MAX7325 2-wire serial-interfaced peripheral features 16 I/O ports
• Manufacturer: Maxim

I
and 8 Open-Drain I/Os
Table 1. MAX7319–MAX7329 Family Comparison (continued)
6
8-PORT EXPANDERS
MAX7326
MAX7327
MAX7319
MAX7320
MAX7321
MAX7322
2
PART
_______________________________________________________________________________________
C Port Expander with 8 Push-Pull
ADDRESS
101xxxx
110xxxx
110xxxx
101xxxx
110xxxx
110xxxx
SLAVE
and
I
2
C
INPUTS
Up to 4
Up to 8
—
4
8
4
INTERRUPT
INPUT
MASK
Yes
Yes
Yes
—
—
—
OUTPUTS
OPEN-
DRAIN
Up to 4
Up to 8
—
—
—
—
OUTPUTS
PUSH-
PULL
12
12
—
—
8
4
4 input-only, 12 push-pull output versions:
4 input ports with programmable latching transition
detection interrupt and selectable pullups.
12 push-pull outputs with selectable default logic
levels.
Offers maximum versatility for automatic input
monitoring. An interrupt mask selects which inputs
cause an interrupt on transitions, and transition flags
identify which inputs have changed (even if only
for a transient) since the ports were last read.
4 I/O, 12 push-pull output versions:
4 open-drain I/O ports with latching transition
detection interrupt and selectable pullups.
12 push-pull outputs with selectable default logic
levels.
Open-drain outputs can level shift the logic-high
state to a higher or lower voltage than V+ using
external pullup resistors, but pullups draw current
when output is low. Any open-drain port can be used
as an input by setting the open-drain output to logic-
high. Transition flags identify which open-drain port
inputs have changed (even if only for a transient)
since the ports were last read.
Input-only versions:
8 input ports with programmable latching transition
detection interrupt and selectable pullups.
Output-only versions:
8 push-pull outputs with selectable power-up default
levels.
I/O versions:
8 open-drain I/O ports with latching transition
detection interrupt and selectable pullups.
4 input-only, 4 output-only versions:
4 input ports with programmable latching transition
detection interrupt and selectable pullups.
4 push-pull outputs with selectable power-up default
levels.
CONFIGURATION