NTE7142 Просмотр технического описания (PDF) - NTE Electronics
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NTE7142 Datasheet PDF : 3 Pages
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Electrical Characteristics: (VCC = +5V ±10%, TA = 0° to +70°C, C1–C4 = 0.1µF unless otherwise
specified)
Parameter
Test Conditions
Min Typ Max Unit
RS–232 Transmitter
Output Voltage Swing
All transmitter output loaded with 3kΩ to GND ±5
±8
–
V
Input Logic Threshold Low
–
1.4 0.85 V
Input Logic Threshold High
2.0
1.4
–
V
Logic Pull–Up/Input Current
Normal operation
–
5
40 µA
Output Leakage Current
Data Rate
VCC = 0V, VOUT = ±15V
Normal operation
–
±0.01 ±10 µA
–
200 116 kb/s
Transmitter Output Resistance
Output Short–Circuit Current
VCC = V+ = V– = 0V, VOUT = ±2V
VOUT = 0V
300 10M
±7
±22
–
Ω
– mA
RS–232 Receiver
RS–232 Input Voltage Operating
Range
–
–
±30 V
RS–232 Input Threshold Low
VCC = 5V, R2IN
0.8
1.3
–
V
RS–232 Input Threshold High
VCC = 5V, R2IN
–
1.8
2.4 V
RS–232 Input Hysteresis
RS–232 Input Resistance
VCC = 5V
0.2
0.5
1.0 V
3
5
7 kΩ
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
IOUT = 3.2mA
IOUT = –1.0mA
–
0.2
0.4 V
3.5 VCC–0.2 –
V
TTL/CMOS Output Short–Circuit
Current
TTL/CMOS Output Leakage Current
Operating Supply Voltage
Sourcing, VOUT = GND
Shrinking, VOUT = VCC
0V ≤ VOUT ≤ VCC
–2
–10
– mA
10
30
– mA
–
±0.05 ±10 µA
4.5
–
5.5 V
VCC Supply Current
No load
3kΩ load, both inputs
–
4
10 mA
–
15
– mA
Transition Slew Rate
CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ,
VCC = 5V, TA = +25°C, measured from
+3V to –3V or –3V to +3V
6
12
30 V/µs
Transmitter Propagation Delay
TTL to RS–232 (normal operation)
Receiver Propagation Delay
RS–232 to TTL (normal operation)
tPHLT
tPLHT
tPHLR
tPLHR
–
1.3
3.5 µs
–
1.5
3.5 µs
–
0.5
1.0 µs
–
0.6
1.0 µs
Transmitter + to – Propagation Delay tPHLT – tPLHT
Difference (normal operation)
–
300
– ns
Receiver + to – Propagation Delay
Difference (normal operation)
tPHLR – tPLHR
–
100
– ns
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