DS228SN Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated
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DS228SN Datasheet PDF : 9 Pages
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DC ELECTRICAL CHARACTERISTICS (continued)
RS-232 Receivers
RS-232 Input Voltage Operating Range
VIR
±25
±30
RS-232 Input Threshold Low
VRTL
0.8
1.3
RS-232 Input Threshold High
VRTH
1.8
2.4
RS-232 Input Hysteresis
VHY
0.2
0.5
1
RS-232 Input Resistance
RIN
3
5
7
TTL/CMOS Output Voltage Low
VROL
0.2
0.4
TTL/CMOS Output Voltage High
VROH
3.5 VCC-0.2
TTL/CMOS Output Short Circuit
Current (VOUT=GND)
IRSC
-2
-10
TTL/CMOS Output Short Circuit
Current (VOUT=VCC)
IRSC
10
30
DS229
(0°C to 70°C)
V
V
V
V
kΩ
V
5
V
6
mA
mA
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Transition Slew Rate
tSR
Transmitter Propagation
Delay TTL to RS-232
tPHLT
tPLHT
Receiver Propagation
Delay RS-232 to TTL
tPHLR
tPLHR
Transmitter + to - Propagation
Delay Difference
tPHLT
-tPLHT
Receiver + to - Propagation
Delay Difference
tPHLR
-tPLHR
MIN
6
(0°C to 70°C)
TYP MAX UNITS NOTES
12
30 V/µs
7
1.3
3.5
µs
1.5
3.5
µs
0.5
1
µs
0.6
1
µs
300
ns
100
ns
NOTES:
1. All voltages are referenced to ground.
2. All transmitter outputs loaded with 3 kΩ=to ground
3. VCC = V+ = V- = 0V; VOUT = ±2V.
4. VOUT = 0V.
5. IOUT = 3.2 mA.
6. IOUT = -1.0 mA.
7. CL = 50 pF - 2500 pF; RL = 3 kΩ=- 7 kΩ; VCC = 5V; TA = 25°C.
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