SP505AN Datasheet, PDF (25/30 Pages) Sipex Corporation – Multi-Protocol Serial Transceivers

Paragraph 6.3.2 – V.11 Circuits
6.3.2.1 Generator open circuit output voltage
The magnitude of the driver's outputs for:
a) between point A and point B
b) either point A or point B to point C
shall be less than or equal to 12.0V for either
binary state when terminated with a 3.9kΩ
resistor between points A and points B.
A
3.9kΩ
B
V_OC
V_OCA
V_OCB
6.3.2.3 Generator output rise/fall time
The driver outputs' transition from one binary
point to another shall be less than or equal to 0.3
of the nominal bit duration (t_b). This is measured
between 10% and 90% of its steady state value
and with a "Y" resistor configuration. The resistor
network contains two 50Ω resistors in series
with a center-tap 50Ω resistor between the two
series resistors to ground.
6.3.2.4 Generator polarities
The driver's point A output shall be:
a) greater than point B (V_A–V_B > 0V) when the
signal condition 0 is transmitted for data circuits,
or ON for control circuits; and
b) less than point B (V_A–V_B < 0V) when the
signal condition 1 is transmitted for data circuits,
or OFF for control circuits.
C
A
Figure 42. V.11 Driver Open Circuit Voltage
6.3.2.2 Generator terminated output voltage
The magnitude of the driver's outputs for:
a) between point A and point B
b) either point A or point B to point C
shall be greater than or equal to 2.0V for either
binary state when terminated with two 50Ω
resistors connected in series between point A
and point B.
The center point of the two 50Ω resistors shall
measure less than or equal to 3.0V with respect
to point C.
A
Oscilloscope
50Ω
50Ω
B
50Ω
C
Figure 44. V.11 Transition Time
Paragraph 6.3.3 – V.28 Circuits
6.3.3.1 Generator open circuit output voltage
The single-ended generator or driver's output
(point A), for either binary state, shall be less
than or equal to 25.0V with respect to ground
(point C).
50Ω
V_T
50Ω
B
V_OS
C
Figure 43. V.11 Driver Output Terminated Voltage
6.3.1.2 Generator terminated output voltage
The driver output's magnitude, for either binary
state, shall be greater than or equal to 3.0V when
terminated with a 3kΩ resistor to ground.
6.3.1.3 Generator output rise/fall time
The driver output's transition from one binary
point to another shall be less than or equal to 3%
or 1.0ms, whichever is greater, of the nominal
bit duration (t_b). This is measured between +3V
and -3V of the transition and with 3kΩ resistor
// 2500pF loads to ground.
SP505/6/7APN/03
SP505, SP506, SP507 Application Note
25
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