DS75176B Datasheet, PDF (3/8 Pages) National Semiconductor (TI) – Multipoint RS-485/RS-422 Transceivers

Electrical Characteristics (Notes 2, 3) (Continued)
0˚C ≤ T_A≤ 70˚C, 4.75V < V_CC< 5.25V unless otherwise specified
Symbol
Parameter
Conditions
I_OSD
I_OSR
Driver Short-Circuit
Output Current
Receiver Short-Circuit
Output Current
V_O = −7V (Note 7)
V_O = +12V (Note 7)
V_O = 0V
Min Typ Max Units
−250 mA
+250 mA
−15
−85 mA
Note 1: “Absolute Maximum Ratings” are those 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 tables of “Electrical Characteristics” provide conditions for actual device operation.
Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified.
Note 3: All typicals are given for V_CC = 5V and T_A = 25˚C.
Note 4: Derate linearly at 5.56 mW/˚C to 650 mW at 70˚C.
Note 5: Derate linearly @ 6.11 mW/˚C to 400 mW at 70˚C.
Note 6: Differential - Input/Output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B.
Note 7: All worst case parameters for which note 7 is applied, must be increased by 10% for DS75176BT. The other parameters remain valid for −40˚C < T_A
< +85˚C.
Switching Characteristics
V_CC = 5.0V, T_A = 25˚C
Symbol
Parameter
t_PLH
Driver Input to Output
t_PHL
Driver Input to Output
t_r
Driver Rise Time
t_f
Driver Fall Time
t_ZH
Driver Enable to Output High
t_ZL
Driver Enable to Output Low
t_LZ
Driver Disable Time from Low
t_HZ
Driver Disable Time from High
t_PLH
Receiver Input to Output
t_PHL
Receiver Input to Output
t_ZL
Receiver Enable to Output Low
t_ZH
Receiver Enable to Output High
t_LZ
Receiver Disable from Low
t_HZ
Receiver Disable from High
Conditions
R_LDIFF = 60Ω
C_L1 = C_L2 = 100 pF
R_LDIFF = 60Ω
C_L1 =C_L2 = 100 pF
(Figure 3 and Figure 5)
C_L = 100 pF (Figure 4 and Figure 6) S1
Open
C_L = 100 pF (Figure 4 and Figure 6) S2
Open
C_L = 15 pF (Figure 4 and Figure 6) S2
Open
C_L = 15 pF (Figure 4 and Figure 6) S1
Open
C_L = 15 pF (Figure 2 and Figure 7)
S1 and S2 Closed
C_L = 15 pF (Figure 2 and Figure 8) S2
Open
C_L = 15 pF (Figure 2 and Figure 8) S1
Open
C_L = 15 pF (Figure 2 and Figure 8) S2
Open
C_L = 15 pF (Figure 2 and Figure 8) S1
Open
Min Typ Max Units
12
22
ns
17
22
ns
18
ns
18
ns
29 100
ns
31
60
ns
13
30
ns
19 200
ns
30
37
ns
32
37
ns
15
20
ns
11
20
ns
28
32
ns
13
35
ns
3
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