YTD428_07 Datasheet, PDF (21/28 Pages) YAMAHA CORPORATION – IDSU ISDN DSU for Terminal Equipment

ELECTRICAL CHARACTERISTICS
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s T Reference Point Receive Characteristic (TE mode)
(VDD = 5.0 ± 5% V, Top = -20 ~ 70 °C, CL = 50 pF)
Parameter
Delay Time
Rise Time
Fall Time
Symbol
tRDR
tRDL
tRDH
tRDF
tRR
tRF
Condition
Note 1
Note 2
Min.
Typ.
Max.
700
200
700
700
30
30
Units
ns
ns
ns
ns
ns
ns
Note 1
Note 2
Note 3
With respect to HRD, LRD pins (ODSEL = “H”)
With respect to HRD, LRD pins
Figure 5.2 shows the timing when RDP = “H”. When RDP = “L”, the output signal polarity from HRD and LRD pins
are inverted.
Receive signal (I)
0V
(LI1 - LI2)
t RDR
t RDL
t RR
t RF
HRD (O)
LRD (O)
t RDH
t RR
t RDF
t RF
2.0V
0.8 V
2.0 V
0.8 V
Figure 5.2 Receive Timing