TI380C60 Datasheet, PDF (10/15 Pages) Texas Instruments – CMOS TOKEN-RING INTERFACE DEVICE

TI380C60
CMOS TOKENĆRING INTERFACE DEVICE
SPWS015B − APRIL 1995 − REVISED OCTOBER 1996
electrical characteristics over recommended ranges of supply voltage and operating case
temperature (unless otherwise noted)
1.5 V
IOL
Test
Point
50 pF
TTL
Output
Under
Test
IOH
(a) TTL-OUTPUT TEST LOAD
Test
Point
Test
Point
50 pF
XMT+
330 Ω
50 pF
XMT−
(b) XMT+ and XMT− TEST LOAD
Iref
200 Ω
IEQB
RCV+
VEQW
330 Ω
RCV−
(c) Iref TEST CIRCUIT
(d) EQUALIZER TEST CIRCUIT
Figure 4. Test and Load Circuits
phantom driver (PHOUTA and PHOUTB)
PARAMETER
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
TEST CONDITIONS
IOH = − 1 mA
IOH = − 2 mA
VO = 0 V
VO = VDD
VO = VDD
VO = 0 V
MIN
4.1
3.8
−4
1
− 100
− 100
MAX
− 20
10
100
100
UNIT
V
V
mA
mA
µA
µA
wire fault ( WFLT ) (see Notes 10 and 11)
PARAMETER
MIN MAX UNIT
RL(S) Phantom-drive load resistance detected as short circuit
0.15 kΩ
RL(O) Phantom-drive load resistance detected as open circuit
50
kΩ
RL(N) Phantom-drive load resistance detected as normal
2.9 5.5 kΩ
NOTES: 10. The wire-fault circuit recognizes a fault condition for any phantom-drive load resistance to ground greater than RL(O) or any load
resistance less than RL(S). Any resistance in the range specified for RL(N) is not recognized as a wire fault. A fault condition on either
PHOUTA or PHOUTB results in WFLT being asserted (low).
11. Resistor [RL(S), RL(O), RL(N)] connected from output under test to ground, other output loaded with 4.1 Ω to ground.
10
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