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DS26C31T Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. DS26C31T
Description  CMOS Quad TRI-STATE Differential Line Driver
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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DS26C31T Datasheet(HTML) 3 Page - National Semiconductor (TI)

 
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DC Electrical Characteristics (Continued)
V
CC = 5V ± 10% (unless otherwise specified) (Note 4)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
OFF
Output Leakage Current
DS26C31T
V
OUT = 6V
100
µA
Power Off (Note 5)
V
CC = 0V
V
OUT = −0.25V
−100
µA
DS26C31M
V
OUT = 6V
100
µA
V
CC = 0V
V
OUT = 0V
−100
µA
(Note 8)
Note 1: Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device
should be operated at these limits. The table of “Electrical Characteristics” provide conditions for actual device operation.
Note 2: Unless otherwise specified, all voltages are referenced to ground. All currents into device pins are positive, all currents out of device pins are negative.
Note 3: Ratings apply to ambient temperature at 25˚C. Above this temperature derate N package at 13.89 mW/˚C, J package 16.13 mW/˚C, M package 9.80 mW/˚C,
E package 12.20 mW/˚C, and W package 6.75 mW/˚C.
Note 4: Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typicals are given for VCC = 5V and TA = 25˚C.
Note 5: See EIA Specification RS-422 for exact test conditions.
Note 6: Measured per input. All other inputs at VCC or GND.
Note 7: This is the current sourced when a high output is shorted to ground. Only one output at a time should be shorted.
Note 8: The DS26C31M (−55˚C to +125˚C) is tested with VOUT between +6V and 0V while RS-422A condition is +6V and −0.25V.
Switching Characteristics
V
CC = 5V ±10%,tr ≤ 6 ns, tf ≤ 6ns(Figures 1, 2, 3, 4) (Note 4)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DS26C31T
CS26C31M
t
PLH,tPHL
Propagation Delays
S1 Open
2
6
11
14
ns
Input to Output
Skew
(Note 9)
S1 Open
0.5
2.0
3.0
ns
t
TLH,tTHL
Differential Output Rise
S1 Open
6
10
14
ns
And Fall Times
t
PZH
Output Enable Time
S1 Closed
11
19
22
ns
t
PZL
Output Enable Time
S1 Closed
13
21
28
ns
t
PHZ
Output Disable Time
S1 Closed
5
9
12
ns
(Note 10)
t
PLZ
Output Disable Time
S1 Closed
7
11
14
ns
(Note 10)
C
PD
Power Dissipation
50
pF
Capacitance (Note 11)
C
IN
Input Capacitance
6
pF
Note 9: Skew is defined as the difference in propagation delays between complementary outputs at the 50% point.
Note 10: Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off. The actual disable times are less than in-
dicated due to the delay added by the RC time constant of the load.
Note 11: CPD determines the no load dynamic power consumption, PD = CPD VCC2f+ICC VCC, and the no load dynamic current consumption, IS = CPD VCC f+
ICC.
Comparison Table of Switching Characteristics into “LS-Type” Load
V
CC = 5V, TA = 25˚C, tr ≤ 6 ns, tf ≤ 6ns(Figures 2, 4, 5, 6) (Note 12)
Symbol
Parameter
Conditions
DS26C31T
DS26LS31C
Units
Typ
Max
Typ
Max
t
PLH,tPHL
Propagation Delays
C
L = 30 pF
Input to Output
S1 Closed
6
8
10
15
ns
S2 Closed
Skew
(Note 9)
C
L = 30 pF
S1 Closed
0.5
1.0
2.0
6.0
ns
S2 Closed
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