SI8641BD-B-IS Datasheet, PDF (4/44 Pages) STMicroelectronics – LOW-POWER QUAD-CHANNEL DIGITAL ISOLATOR

Si8640/41/42/45
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Ambient Operating Temperature*
T_A
–40
25
125
°C
Supply Voltage
V_DD1
2.5
—
5.5
V
V_DD2
2.5
—
5.5
V
*Note: The maximum ambient temperature is dependent on data frequency, output loading, number of operating channels,
and supply voltage.
Table 2. Electrical Characteristics
(V_DD1 = 5 V ±10%, V_DD2 = 5 V ±10%, T_A = –40 to 125 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max Unit
VDD Undervoltage Thresh- VDDUV+
old
V_DD1, V_DD2 rising
1.95
2.24
2.375 V
VDD Undervoltage Thresh- VDDUV– V_DD1, V_DD2 falling
old
1.88
2.16
2.325
V
VDD Undervoltage
Hysteresis
VDD_HYS
50
70
95
mV
Positive-Going Input Thresh- VT+
old
All inputs rising
1.4
1.67
1.9
V
Negative-Going Input
Threshold
VT–
All inputs falling
1.0
1.23
1.4
V
Input Hysteresis
V_HYS
0.38
0.44
0.50
V
High Level Input Voltage
V_IH
2.0
—
—
V
Low Level Input Voltage
V_IL
—
—
0.8
V
High Level Output Voltage
V_OH
loh = –4 mA
V_DD1,V_DD2 – 0.4 4.8
—
V
Low Level Output Voltage
V_OL
lol = 4 mA
—
0.2
0.4
V
Input Leakage Current
I_L
Output Impedance¹
Z_O
—
—
±10
µA
—
50
—

Enable Input High Current
I_ENH
V_ENx = V_IH
—
2.0
—
µA
Enable Input Low Current
I_ENL
V_ENx = V_IL
—
2.0
—
µA
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. 1.6