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MAX4820/MAX4821
+3.3V/+5V, 8-Channel, Cascadable Relay Drivers
with Serial/Parallel Interface
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V CC , COM..............................................................-0.3V to +6.0V
OUT_........................................................-0.3V to (V COM + 0.3V)
CS , SCLK, DIN, SET , RESET , A0, A1, A2, LVL......-0.3V to +6.0V
DOUT..........................................................-0.3V to (V CC + 0.3V)
Continuous OUT_ Current (all outputs turned on) ............150mA
Continuous OUT_ Current (single output turned on) ........300mA
Continuous Power Dissipation (T A = +70°C)
20-Lead Thin QFN (derate 16.9mW/°C above +70°C)..1350mW
θ JA (Note 1) ...............................................................59.3°C/W
20-Pin TSSOP (derate 21.7mW/°C above +70°C) .....1739mW
θ JA (Note 1) ..................................................................46°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature (10s) ...........................................+300°C
Reflow Temperature.........................................................+260°C
Note 1: Package thermal resistances were obtained using the method described in JEDEC specifications. For detailed information on
package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial .
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V CC = +3V to +5.5V, V COM = V CC , T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)
PARAMETER
Operating Voltage
SYMBOL
V CC
CONDITIONS
MIN
2.3
TYP
MAX
5.5
UNITS
V
Quiescent Current
I Q
I OUT _ = 0μA,
logic inputs = 0V or V CC
V CC = 3.6V
V CC = 5.5V
15
20
50
70
μA
Thermal Shutdown
160
°C
Power-On Reset
Power-On Reset Hysteresis
0.8
1.5
140
2.2
V
mV
DIGITAL INPUTS (SCLK, DIN, CS , LVL, A0, A1, A2, RESET , SET )
Input Logic-High Voltage
Input Logic-Low Voltage
Input Logic Hysteresis
V IH
V IL
V HYST
V CC = 3.3V
V CC = 5V
V CC = 3.3V
V CC = 5V
2.0
2.4
150
0.6
0.8
V
V
mV
Input Leakage Currents
I LEAK
Input voltages = 0V or 5.5V
-1.0
0.01
+1.0
μA
C IN Input Capacitance
C IN
5
pF
DIGITAL OUTPUT (DOUT)
DOUT Low Voltage
DOUT High Voltage
V OL
V OH
I SINK = 6mA
I SOURCE = 0.5mA
V CC - 0.5
0.4
V
V
RELAY OUTPUT DRIVERS (OUT1–OUT8)
OUT_ Drive Current
V CC = 2.7V
V CC = 4.5V
70
70
mA
OUT_ On-Resistance
OUT_ Voltage
I OUT Off-Leakage Current
Kickback Diode Forward Voltage
R ON
V OUT _
I LEAK
V FORW
V CC = 2.7V
V CC = 3.0V, I OUT _ = 70mA
V OUT _ = V CC , all outputs off
I OUT _ = 150mA (Note 3)
-1
2
6
0.4
+1
1.5
Ω
V
μA
V
2
Maxim Integrated
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