YTD428 查看數據表（PDF） - Yamaha Corporation

零件编号

产品描述 (功能)

生产厂家

YTD428

IDSU ISDN DSU for Terminal Equipment

Yamaha Corporation 

ELECTRICAL CHARACTERISTICS

- 19 -

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

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