MC145408 查看數據表（PDF） - Motorola => Freescale
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MC145408 Datasheet PDF : 9 Pages
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ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND, except where noted)
Rating
Symbol
Value
Unit
DC Supply Voltage (VDD ≥ VCC)
VDD
– 0.5 to + 13.5
V
VSS
+ 0.5 to – 13.5
VCC
– 0.5 to + 6.0
Input Voltage Range
VIR
Rx1 – Rxn
DI1 – DIn
V
VSS – 15 to VDD + 15
0.5 to VCC + 15
DC Current Drain per Pin
I
± 00
mA
Power Dissipation
PD
1
W
Operating Temperature Range
TA
– 40 to + 85
°C
Storage Temperature Range
Tstg
– 85 to + 150
°C
This device contains circuitry to protect the
inputs and outputs against damage due to high
static voltages or electric fields; however, it is
advised that normal precautions be taken to
avoid applications of any voltage higher than
maximum rated voltages to this high imped-
ance circuit.
For proper operation it is recommended that
Vout and Vin be constrained to the ranges
described as follows:
Digital I/O: Driver Inputs (DI):
(GND ≤ VDI ≤ VCC).
Receiver Outputs (DO):
(GND ≤ VDO ≤ VCC).
EIA–232 I/O: Driver Outputs (Tx):
(VSS ≤ VTx1 – Txn ≤ VDD).
Receiver Inputs (Rx):
VSS – 15 V ≤ VRx1 – Rxn ≤ VDD
+ 15 V).
Reliability of operation is enhanced if unused
outputs are tied off to an appropriate logic
voltage level (e.g., either GND or VCC for DI,
and GND for Rx).
DC ELECTRICAL CHARACTERISTICS (All polarities referenced to GND = 0 V, TA = – 40 to + 85°C)
Parameter
Symbol
Min
Typ
Max
Unit
DC Supply Voltage
Quiescent Supply Current (Outputs Unloaded, Inputs Low)
VDD = + 12 V
VSS = – 12 V
VCC = + 5 V
VDD
VSS
VCC
IDD
ISS
ICC
4.5
5 to 12
13.2
V
– 4.5 – 5 to – 12 – 13.2
4.5
5
5.5
—
425
635
µA
—
– 400
– 600
—
110
200
RECEIVER ELECTRICAL SPECIFICATIONS
(Voltage polarities referenced to GND = 0 V, VDD = + 12 V, VSS = – 12 V, TA = – 40 to + 85°C, VCC = + 5 V, ± 10%)
Characteristic
Symbol
Min
Typ
Input Turn–On Threshold
VDO = VOL
Rx1 – Rxn
Von
1.35
1.8
Input Turn–Off Threshold
VDO = VOH
Rx1 – Rxn
Voff
0.75
1
Input Threshold Hysteresis
∆ = Von – Voff
Vhys
0.6
0.8
Input Resistance
(VSS – 15 V) ≤ V Rx1 – Rxn ≤ (VDD + 15 V)
Rin
3
5.4
High Level Output Voltage
VRx = – 3 to – 25 V* (DO1 – DOn)
Iout = – 20 µA VOH
4.9
4.9
Iout = – 1.0 mA
3.8
4.3
Low Level Output Voltage
VRx = + 3 to + 25 V* (DO1 – DOn)
Iout = + 2 mA VOL
—
0.02
Iout = + 4 mA
—
0.5
* This is the range of input voltages as specified by EIA–232–E to cause a receiver to be in the high or low.
Max
Unit
2.35
V
1.25
V
—
V
7
kΩ
—
V
—
0.5
V
0.7
MOTOROLA
MC145403•MC145404•MC145405•MC145408
3
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