DS8641 Datasheet, PDF (4/5 Pages) National Semiconductor (TI) – Quad Unified Bus Transceiver

Switching Characteristics
T_A = 25˚C, V_CC = 5V, unless otherwise indicated
Symbol
Parameter
t_PD
Propagation Delays (Note 8)
Disable to Bus “1”
Disable to Bus “0”
Driver Input to Bus “1”
Driver Input to Bus “0”
Bus to Logical “1” Receiver Output
Bus to Logical “0” Receiver Output
Conditions
Min
Typ
Max
Units
(Note 6)
19
30
ns
15
30
ns
17
25
ns
17
25
ns
(Note 7)
20
30
ns
18
30
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 table of “Electrical Characteristics” provides conditions for actual device operation.
Note 3: Unless otherwise specified min/max limits apply across the 0˚C to +70˚C range for the DS8641. All typical values are for T_A = 25˚C and V_CC = 5V.
Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown
as max or min on absolute value basis.
Note 5: Only one output at a time should be shorted.
Note 6: 91Ω from bus pin to V_CC and 200Ω from bus pin to ground. C_LOAD = 15 pF total. Measured from V_IN = 1.5V to V_BUS = 1.5V, V_IN = 0V to 3V pulse.
Note 7: Fan-out of 10 load, C_LOAD = 15 pF total. Measured from V_IN = 1.5V to V_OUT = 1.5V, V_IN = 0V to 3V pulse.
Note 8: The following apply for V_CC = 5V, T_A = 25˚C unless otherwise specified.
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