4 Rev. 1.6
Si8650/51/52/55
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter Symbol Test Condition Min Typ Max Unit
Ambient Operating Temperature* T
A
150 Mbps, 15 pF, 5 V –40 25 125 ºC
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
=5V±10%, V
DD2
=5V±10%, T
A
= –40 to 125 ºC)
Parameter Symbol Test Condition Min Typ Max Unit
VDD Undervoltage Threshold VDDUV+ V
DD1
, V
DD2
rising 1.95 2.24 2.375 V
VDD Undervoltage Threshold VDDUV– V
DD1
, V
DD2
falling 1.88 2.16 2.325 V
VDD Negative-Going
Lockout Hysteresis
VDD
HYS
50 70 95 mV
Positive-Going Input Threshold VT+ 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
——0.8V
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
——±10µA
Output Impedance
1
Z
O
—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.
