參數(shù)資料
型號： MC145408
廠商： Motorola, Inc.
英文描述： Driver/ Receiver(驅(qū)動器/接收器)
中文描述： 驅(qū)動器/接收器（驅(qū)動器/接收器）
文件頁數(shù)： 3/9頁
文件大?。?/td> 184K
代理商： MC145408
MC145403
MC145404
MC145405
MC145408
MOTOROLA
3
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND, except where noted)
Rating
Symbol
Value
Unit
DC Supply Voltage (VDD
≥
VCC)
VDD
VSS
VCC
– 0.5 to + 13.5
+ 0.5 to – 13.5
– 0.5 to + 6.0
V
Input Voltage Range
Rx1 – Rxn
DI1 – DIn
VIR
VSS – 15 to VDD+ 15
0.5 to VCC+ 15
±
00
V
DC Current Drain per Pin
I
mA
Power Dissipation
PD
TA
Tstg
1
W
Operating Temperature Range
– 40 to + 85
°
C
Storage Temperature Range
– 85 to + 150
°
C
DC ELECTRICAL CHARACTERISTICS
(All polarities referenced to GND = 0 V, TA = – 40 to + 85
°
C)
Parameter
Symbol
Min
Typ
Max
Unit
DC Supply Voltage
VDD
VSS
VCC
4.5
– 4.5
4.5
5 to 12
– 5 to – 12
5
13.2
– 13.2
5.5
V
Quiescent Supply Current (Outputs Unloaded, Inputs Low)
VDD = + 12 V
VSS = – 12 V
VCC = + 5 V
IDD
ISS
ICC
—
—
—
425
– 400
110
635
– 600
200
μ
A
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
Max
Unit
Input Turn–On Threshold
VDO = VOL
Rx1 – Rxn
Von
1.35
1.8
2.35
V
Input Turn–Off Threshold
VDO = VOH
Rx1 – Rxn
Voff
0.75
1
1.25
V
Input Threshold Hysteresis
= Von – Voff
Vhys
0.6
0.8
—
V
Input Resistance
(VSS – 15 V)
≤
V Rx1 – Rxn
≤
(VDD + 15 V)
Rin
3
5.4
7
k
High Level Output Voltage
VRx = – 3 to – 25 V* (DO1 – DOn)
Iout = – 20
μ
A
Iout = – 1.0 mA
VOH
4.9
3.8
4.9
4.3
—
—
V
Low Level Output Voltage
VRx = + 3 to + 25 V* (DO1 – DOn)
* This is the range of input voltages as specified by EIA–232–E to cause a receiver to be in the high or low.
Iout = + 2 mA
Iout = + 4 mA
VOL
—
—
0.02
0.5
0.5
0.7
V
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).
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