TI380C30 Datasheet, PDF (33/78 Pages) Texas Instruments – INTEGRATED TOKEN-RING COMMPROCESSOR AND PHYSICAL-LAYER INTERFACE

TI380C30
INTEGRATED TOKEN-RING
COMMPROCESSOR AND PHYSICAL-LAYER INTERFACE
SPWS016A – NOVEMBER 1994 – REVISED JULY 1995
switching characteristics over recommended range of supply voltage (unless otherwise noted)
transmitter-drive characteristics
PARAMETER
VPP(XMT) XMT+ / XMT– peak-to-peak voltage (see Note 16)
NOTE 16: VPP(XMT) is determined by:
VOH(XMT+) + VOH(XMT–) – VOL(XMT+) – VOL(XMT–)
TEST CONDITIONS
VDD = 4.75 V,
See Figures 6 and 7
VDD = 5.25 V,
See Figures 6 and 7
MIN MAX UNIT
8.2
V
10.3
transmitter switching characteristics (see Figures 6 and 7)
PARAMETER
TEST CONDITIONS
XMT+/XMT– skew (see Note 17)
tsk(DRV) = – 1 ns
tsk(DRV) = + 1 ns
XMT+/XMT– asymmetry (see Note 18)
tsk(DRV) = – 1 ns
tsk(DRV) = + 1 ns
NOTES: 17. XMT+/XMT– skew is determined by: td(XMT+ _H) – td(XMT– _L) or td(XMT+ _L) – td(XMT– _H)
) ) ) ) 18. XMT+/XMT– asymmetry is determined by:
td(XMT _L) td(XMT– _H) td(XMT _H) td(XMT– _L)
2
–
2
MIN MAX UNIT
– 3 + 3 ns
– 3 + 3 ns
– 2 + 2 ns
– 2 + 2 ns
DRVR+
DRVR–
XMT+
XMT–
2.4 V
1.5 V
0.45 V
tsk(DRV)
td(XMT+L)
td(XMT– _H)
tsk(DRV)
td(XMT+H)
2.4 V
1.5 V
0.45 V
VOH(XMT+)
V50(XMT+)
VOL(XMT+)
VOH(XMT–)
V50(XMT–)
VOL(XMT–)
td(XMT– _L)
Figure 7. Transmitter Timing
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