TI380C30A Datasheet, PDF (36/81 Pages) Texas Instruments – INTEGRATED TOKEN-RING COMMPROCESSOR AND PHYSICAL-LAYER INTERFACE

TI380C30A
INTEGRATED TOKEN-RING COMMPROCESSOR
AND PHYSICAL-LAYER INTERFACE
SPWS034 – MARCH 1998
switching characteristics over recommended range of supply voltage (unless otherwise noted)
transmitter drive characteristics (see Figures 6 and 7)
PARAMETER
TEST CONDITIONS
VPP(XMT) XMT+/XMT– peak-to-peak voltage (see Note 16)
VDD = 4.75 V
VDD = 5.25 V
NOTE 16: VPP(XMT) is determined by: VOH(XMT+) + VOH(XMT–) – VOL(XMT+) – VOL(XMT–)
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
–2
2
ns
–2
2
DRVR+
2.4 V
1.5 V
0.45 V
DRVR–
XMT+
XMT–
tsk(DRV)
td(XMT+L)
td(XMT– _H)
2.4 V
1.5 V
0.45 V
tsk(DRV)
VOH(XMT+)
V50(XMT+)
VOL(XMT+)
td(XMT+H)
VOH(XMT–)
V50(XMT–)
VOL(XMT–)
td(XMT– _L)
Figure 7. Transmitter
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