SI8421AD Datasheet, PDF (4/37 Pages) List of Unclassifed Manufacturers – LOW-POWER, SINGLE AND DUAL-CHANNEL DIGITAL ISOLATORS

Si8410/20/21 (5 kV)
Si8422/23 (2.5 & 5 kV)
1. Electrical Specifications
Table 1. Electrical Characteristics
(V_DD1 = 5 V ±10%, V_DD2 = 5 V ±10%, T_A = –40 to 125 ºC)
Parameter
Symbol Test Condition
Min
Typ
Max Unit
VDD Undervoltage Threshold
VDD Negative-Going Lockout
Hysteresis
VDDUV+ V_DD1, V_DD2 rising
VDD_HYS
2.15
45
2.3
2.5
V
75
95
mV
Positive-Going Input Threshold
VT+
All inputs rising
1.6
—
1.9
V
Negative-Going Input Threshold VT–
All inputs falling
1.1
—
1.4
V
Input Hysteresis
High Level Input Voltage
Low Level Input Voltage
High Level Output Voltage
Low Level Output Voltage
Input Leakage Current
Output Impedance¹
V_HYS
0.40
V_IH
2.0
V_IL
—
V_OH
loh = –4 mA V_DD1,V_DD2 – 0.4
V_OL
lol = 4 mA
—
I_L
—
Z_O
—
DC Supply Current (All inputs 0 V or at Supply)
0.45
—
—
4.8
0.2
—
50
0.50
V
—
V
0.8
V
—
V
0.4
V
±10
µA
—

Si8410Ax, Bx
V_DD1
V_DD2
V_DD1
V_DD2
Si8420Ax, Bx
All inputs 0 DC
—
All inputs 0 DC
—
All inputs 1 DC
—
All inputs 1 DC
—
1.0
1.5
1.0
1.5
mA
3.0
4.5
1.0
1.5
V_DD1
V_DD2
V_DD1
V_DD2
Si8421Ax, Bx
All inputs 0 DC
—
All inputs 0 DC
—
All inputs 1 DC
—
All inputs 1 DC
—
1.3
2.0
1.7
2.6
mA
5.8
8.7
1.7
2.6
V_DD1
V_DD2
V_DD1
V_DD2
Si8422Ax, Bx
All inputs 0 DC
—
All inputs 0 DC
—
All inputs 1 DC
—
All inputs 1 DC
—
1.7
2.6
1.7
2.6
mA
3.7
5.6
3.7
5.6
V_DD1
V_DD2
V_DD1
V_DD2
All inputs 0 DC
—
All inputs 0 DC
—
All inputs 1 DC
—
All inputs 1 DC
—
3.7
5.6
3.7
5.6
mA
1.7
2.6
1.7
2.6
Si8423Ax, Bx
V_DD1
V_DD2
V_DD1
V_DD2
All inputs 0 DC
—
All inputs 0 DC
—
All inputs 1 DC
—
All inputs 1 DC
—
5.4
8.1
1.7
2.6
mA
1.3
2.0
1.7
2.6
Notes:
1. The nominal output impedance of an isolator driver channel is approximately 50 , ±40%, which is a combination of
the value of the on-chip series termination resistor and channel resistance of the output driver FET. When driving loads
where transmission line effects will be a factor, output pins should be appropriately terminated with controlled
impedance PCB traces.
2. t_PSK(P-P) is the magnitude of the difference in propagation delay times measured between different units operating at
the same supply voltages, load, and ambient temperature.
3. Start-up time is the time period from the application of power to valid data at the output.
4
Rev. 1.3