DS34C87T_02 Datasheet, PDF (3/8 Pages) National Semiconductor (TI) – CMOS Qual TRI-STATE Differential Line Driver

DC Electrical Characteristics (Note 4) (Continued)
Note 6: Measured per input. All other inputs at V_CC 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.
Switching Characteristics (Note 4)
V_CC = 5V ±10%, t _r, t_f ≤ 6 ns (Figures 1, 2, 3, 4)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
t_PLH, t_PHL
Propagation Delay
Input to Output
S1 Open
6
11
ns
Skew
(Note 8)
S1 Open
0.5
3
ns
t_TLH, t_THL
Differential Output Rise
And Fall Times
S1 Open
6
10
ns
t_PZH
Output Enable Time
S1 Closed
t_PZL
Output Enable Time
S1 Closed
t_PHZ
Output Disable Time (Note 9)
S1 Closed
t_PLZ
Output Disable Time (Note 9)
S1 Closed
C_PD
Power Dissipation
Capacitance (Note 10)
12
25
ns
13
26
ns
4
8
ns
6
12
ns
100
pF
C_IN
Input Capacitance
6
pF
Note 8: Skew is defined as the difference in propagation delays between complementary outputs at the 50% point.
Note 9: Output disable time is the delay from the control input being switched to the output transistors turning off. The actual disable times are less than indicated
due to the delay added by the RC time constant of the load.
Note 10: C_PD determines the no load dynamic power consumption, P_D = C_PD V²CC f + I_CC V_CC, and the no load dynamic current consumption, I_S = C_PD V_CC f
+ I_CC.
Comparison Table of Switching Characteristics into “LS-Type” Load(Note 11)
V_CC = 5V, T_A = +25˚C, t_r ≤ 6 ns, t_f ≤ 6 ns (Figures 4, 5, 6, 7, 8, 9)
Symbol
Parameter
Conditions
DS34C87
DS3487
Units
Typ Max Typ Max
t_PLH, t_PHL
Propagation Delay
Input to Output
6
10
10
15
ns
Skew
(Note 8)
1.5
2.0
ns
t_THL, t_TLH
Differential Output Rise
and Fall Times
4
7
10
15
ns
t_PHZ
Output Disable Time
C_L = 50 pF, R_L = 200Ω,
8
11
17
25
ns
(Note 9)
S1 Closed, S2 Closed
t_PLZ
Output Disable Time
C_L = 50 pF, R_L = 200Ω,
7
10
15
25
ns
(Note 9)
S1 Closed, S2 Closed
t_PZH
Output Enable Time
C_L = 50 pF, R_L = ∞,
11
19
11
25
ns
S1 Open, S2 Closed
t_PZL
Output Enable Time
C_L = 50 pF, R_L = 200Ω,
14
21
15
25
ns
S1 Closed, S2 Open
Note 11: This table is provided for comparison purposes only. The values in this table for the DS34C87 reflect the performance of the device but are not tested or
guaranteed.
Note 12: ESD Rating: HBM (1.5 kΩ, 100 pF) Inputs ≥ 1500V Outputs ≥ 1000V EIAJ (0Ω, 200 pF) All Pins ≥ 350V
3
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