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TI380C30A Datasheet, PDF (32/81 Pages) Texas Instruments – INTEGRATED TOKEN-RING COMMPROCESSOR AND PHYSICAL-LAYER INTERFACE | |||
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TI380C30A
INTEGRATED TOKEN-RING COMMPROCESSOR
AND PHYSICAL-LAYER INTERFACE
SPWS034 â MARCH 1998
electrical characteristics over recommended ranges of supply voltage and operating case
temperature (unless otherwise noted) (continued)
receiver input (RCV+ and RCVâ)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
VB
Receiver-input bias voltage
VT+
Rising-input threshold voltage
See Note 12
VICM = VSB, Rtst = 330 â¦,
See Notes 12, 13, and Figure 6
VSBâ1 VSB+1 V
50 mV
VTâ
Falling-input threshold voltage
VICM = VSB, Rtst = 330 â¦,
See Notes 12, 13, and Figure 6
â50
mV
VAT
Asymmetry threshold voltage, (VT+ + VTâ)/2
VICM = VSB, Rtst = 330 â¦,
See Notes 12, 13, and Figure 6
â15
15 mV
Vr(CM)
Rising-input common-mode rejection
[VT+ (@VSB + 0.5 V) â VT+ (@VSB â 0.5 V) ]
See Notes 12, 13, and Figure 6
â30
Vf(CM)
Falling-input common-mode rejection
[VT+ (@VSB + 0.5 V) â VT+ (@VSB â 0.5 V) ]
See Notes 12, 13, and Figure 6
â30
Both inputs at VSB, See Note 12 and Figure 6
â10
II(RCVR) Receiver input current
Input under test at VSB + 1 V,
Other input at VSB â 1 V,
10
See Notes 12 and 13 and Figure 6
30 mV
30 mV
10
60 µA
IEQB
Equalizer bias current
Rtst = 330 â¦, Input under test at VSB â 1 V,
Other input at VSB + 1 V, See Note 12
RCV+ at 4 V, RCVâ at 1 V or RCV+ at 1 V,
RCVâ at 4 V, See Figure 6
â10
â60
1.0
2.2 mA
VEQW
Equalizer wrap voltage
WRAP = low, See Figure 6
300
700 mV
NOTES: 12. VSB is the self-bias voltage of the input pair RCV+ and RCVâ. It is defined as VSB = (VSB+ +VSBâ) ÷2 (where VSB+ is the self-bias
voltage of RCV+; VSBâ is the self-bias voltage of RCVâ). The self-bias voltage of both pins is approximately VDD÷2.
13. VICM is the common-mode voltage applied to RCV+ and RCVâ.
phantom driver (PHOUTA and PHOUTB)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
VOH High-level output voltage
IOS
IOL
IOZH
IOZL
Short-circuit output current
Low-level output current
Off-state output current with high-level voltage applied
Off-state output current with low-level voltage applied
IOH = â1 mA
IOH = â2 mA
VO = 0 V
VO = VDD
VO = VDD
VO = 0 V
4.1
V
3.8
V
â4 â20 mA
1
10 mA
â100 100 µA
â100 100 µA
wire fault (WFLT) (see Notes 14 and 15)
PARAMETER
MIN MAX UNIT
RLS Phantom load resistance detected as short circuit
0.15 kâ¦
RLO Phantom load resistance detected as open circuit
50
kâ¦
RLN Phantom load resistance detected as normal
2.9 5.5 kâ¦
NOTES: 14. The wire-fault circuit recognizes a fault condition for any phantom-drive load resistance to ground of greater than RLO or any load
resistance less than RLS. Any resistance in the range specified for RLN is not recognized as a wire fault. A fault condition on either
PHOUTA or PHOUTB results in the WFLT signal being asserted (low).
15. Resistor (RLS, RLO, RLN) connected from output under test to ground, other output loaded with 4.1 ⦠to ground.
PLL characteristics
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
VFILT Reference PLL operating filter voltage
tc(XT1) = 125 ns
1.8
4V
32
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