DS96176_15 Datasheet, PDF (4/13 Pages) Texas Instruments – RS-485/RS-422 Differential Bus Transceiver

Not Recommended For New Designs
Electrical Characteristics (Notes 3, 4) (Continued)
Over recommended temperature, common mode input voltage, and supply voltage ranges, unless otherwise specified
Symbol
Parameter
Conditions
Min Typ Max
RECEIVER SECTION
V_OH
Output Voltage HIGH
V_ID = 200 mV, I_OH = −400 µA,
2.7
Figure 3
V_OL
Output Voltage LOW
I_OZ
High Impedance State Output
I_I
Line Input Current (Note 9)
V_ID = −200 mV, I_OL = 8,0 mA
Figure 3
I_OL = 16 mA
V_O = 0.45V to 2.4V
Other Input =
0V
V_I = 12V
0.45
0.50
±20
1.0
V_I = −7.0V
0.8
I_IH
Enable Input Current HIGH
V_IH = 2.7V
20
I_IL
Enable Input Current LOW
V_IL = 0.4V
−100
R_I
Input Resistance
12
I_OS
Short Circuit Output Current
(Note 10)
−15
−85
I_CC
Supply Current (Total Package)
No Load
Outputs Enabled
40
Outputs Disabled
Units
V
V
µA
mA
µA
µA
kΩ
mA
mA
Driver Switching Characteristics
V_CC = 5V, T_A = 25˚C
Symbol
Parameter
t_DD
Differential Output Delay Time
t_TD
Differential Output Transition Time
t_PLH
Propagation Delay Time,
Low-to-High Level Output
t_PHL
Propagation Delay Time,
High-to-Low Level Output
t_PZH
Output Enable Time to High Level
t_PZL
Output Enable Time to Low Level
t_PHZ
Output Disable Time from High Level
t_PLZ
Output Disable Time from Low Level
Conditions
R_L = 60Ω, Figure 4
R_L = 60Ω, Figure 4
R_L = 27Ω, Figure 5
R_L = 27Ω, Figure 5
R_L = 110Ω, Figure 6
R_L = 110Ω, Figure 7
R_L = 110Ω, Figure 6
R_L = 110Ω, Figure 7
Min
Typ
Max
Units
15
25
ns
15
25
ns
12
20
ns
12
20
ns
25
35
ns
25
35
ns
20
25
ns
29
35
ns
Receiver Switching Characteristics
V_CC = 5.0V, T_A = 25˚C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
t_PLH
Propagation Delay Time,
Low-to-High Level Output
t_PHL
Propagation Delay Time,
High-to-Low Level Output
V_ID = 0V to 3.0V
C_L = 15 pF, Figure 8
16
25
ns
16
25
ns
t_PZH
Output Enable Time to High Level
C_L = 15 pF, Figure 9
t_PZL
Output Enable Time to Low Level
t_PHZ
Output Disable Time from High Level
C_L = 5.0 pF, Figure 9
t_PLZ
Output Disable Time from Low Level
15
22
ns
15
22
ns
14
30
ns
24
40
ns
Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual operation.
Note 3: Unless otherwise specified min/max limits apply across the 0˚C to +70˚C range for the DS96176. All typicals are given for V_CC = 5V and T_A = 25˚C.
Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 5: ∆|V_OD| and ∆|V_OC| are the changes in magnitude of V_OD and V_OC, respectively, that occur when the input is changed from a high level to a low level.
Note 6: In EIA Standards RS-422A and RS-485, V_OC, which is the average of the two output voltages with respect to ground, is called output offset voltage, V_OS.
Note 7: The algebraic convention, where the less positive (more negative) limit is designated minimum, is used in this data sheet for common mode input voltage
and threshold voltage levels only.
3
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