Datasheet
MAX4822–MAX4825
+3.3V/+5V, 8-Channel Relay Drivers with Fast
Recovery Time and Power-Save Mode
8 _______________________________________________________________________________________
PIN
MAX4822
MAX4823
NAME FUNCTION
19 19 V
CC
Input Supply Voltage. Bypass V
CC
to GND with a 0.1µF capacitor.
20 20 SET
Set Input. Drive SET low to set all latches and registers high (all outputs are low
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.
PIN
MAX4824 MAX4825
NAME FUNCTION
11RESET
Reset Input. Drive RESET low to clear all latches and registers (all outputs are high
impedance). RESET overrides all other inputs. If RESET and SET are pulled low at the
same time, then RESET takes precedence.
22CS
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).
33LVL
Level Input. LVL determines whether the selected address is switched on or off. Logic-
high on LVL switches on the addressed output. A logic-low on LVL switches off the
addressed output.
44A0 Digital Address 0 Input. (See Figure 3 for address mapping.)
55A1 Digital Address 1 Input. (See Figure 3 for address mapping.)
66A2 Digital Address 2 Input. (See Figure 3 for address mapping.)
77GND Ground
88OUT8
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.
99OUT7
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.
10, 16 10, 16 PGND
Power Ground. PGND is a return for the output sinks. Connect PGND pins together and
to GND.
11 11 OUT6
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.
12 12 OUT5
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.
MAX4822/MAX4823 Pin Description (continued)
MAX4824/MAX4825 Pin Description