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+3.3V/+5V, 8-Channel Relay Drivers with Fast
Recovery Time and Power-Save Mode
MAX4822/MAX4823 Pin Description (continued)
PIN
MAX4822
19
MAX4823
19
NAME
V CC
FUNCTION
Input Supply Voltage. Bypass V CC to GND with a 0.1μF capacitor.
Set Input. Drive SET low to set all latches and registers high (all outputs are low
20
20
SET
impedance). SET overrides all parallel and serial control inputs. RESET overrides SET
under all conditions.
EP
EP
EP
Exposed Pad. Connect exposed paddle to GND.
MAX4824/MAX4825 Pin Description
PIN
MAX4824
MAX4825
NAME
FUNCTION
Reset Input. Drive RESET low to clear all latches and registers (all outputs are high
1
1
RESET
impedance). RESET overrides all other inputs. If RESET and SET are pulled low at the
same time, then RESET takes precedence.
2
2
CS
Chip-Select Input. Drive CS low to select the device. The CS falling edge latches the
output address (A0, A1, A2). The CS rising edge latches level data (LVL).
Level Input. LVL determines whether the selected address is switched on or off. Logic-
3
3
LVL
high on LVL switches on the addressed output. A logic-low on LVL switches off the
addressed output.
4
5
6
7
8
9
10, 16
11
12
4
5
6
7
8
9
10, 16
11
12
A0
A1
A2
GND
OUT8
OUT7
PGND
OUT6
OUT5
Digital Address 0 Input. (See Figure 3 for address mapping.)
Digital Address 1 Input. (See Figure 3 for address mapping.)
Digital Address 2 Input. (See Figure 3 for address mapping.)
Ground
Open-Drain Output 8. Connect OUT8 to the low side of a relay coil. This output is pulled
to PGND when activated, but otherwise is high impedance.
Open-Drain Output 7. Connect OUT7 to the low side of a relay coil. This output is pulled
to PGND when activated, but otherwise is high impedance.
Power Ground. PGND is a return for the output sinks. Connect PGND pins together and
to GND.
Open-Drain Output 6. Connect OUT6 to the low side of a relay coil. This output is pulled
to PGND when activated, but otherwise is high impedance.
Open-Drain Output 5. Connect OUT5 to the low side of a relay coil. This output is pulled
to PGND when activated, but otherwise is high impedance.
8
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