YTD428_07 Datasheet, PDF (20/28 Pages) YAMAHA CORPORATION – IDSU ISDN DSU for Terminal Equipment

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ELECTRICAL CHARACTERISTICS
5.4 AC Characteristics
s T Reference Point Receive Characteristic (NT mode)
(VDD = 5.0 ± 5% V , Top = -20 ~ 70 °C, Load Capacity: CL = 50 pF)
Parameter
Symbol Condition Min.
Transmit Pulse Width
tTPW
5.00
Receive Pulse Width
tRPW
Rise Time
tPR
Fall Time
tPF
Phase Diffierence between
tTRD
Note 1
10.0
Tx and Rx signals
tTRD
Note 2
10.0
Typ.
5.208
5.208
Max. Units
5.40
µs
µs
260
ns
30
ns
14.0
µs
42.0
µs
Phase Difference between
Rx signals
tPH
Note 2,
Note 3
2.0
µs
Note 1 With respect to using the Fixed timing
Note 2 With respect to using the Adaptive timing
Note 3 This value shows the difference between two terminals which are connected with bus system.
HRD
LRD
HTD
LTD
F
L
t RPW
t RPW
t TPW
t TPW
t TRD
t FD
F
Transmit data slot
Receive data slot
L
t PR
t PF
2.0 V
0.8 V
2.0 V
0.8 V
2.4 V
0.4 V
2.4 V
0.4 V
HTD/LTD
(closest terminal)
Note 1
t PH
HTD/LTD
(farthest terminal)
Note 2
Note 1
Note 2
Indicates the terminal that is connected closest from the DSU. The signal from this terminal
reaches the DSU the fastest.
Indicates the terminal that is connected farthest from the DSU. The signal from this terminal
reaches the DSU the slowest.
Figure 5.1 Timing At T Ref. Pt. Interface