Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage (VCC) | a12V |
Input Voltage (DE, RE*, & DI) | b0.5V to (VCC a0.5V) |
Common Mode (VCM) |
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Driver Output/Receiver Input | g15V |
Input Voltage (DO/RI, DO*/RI*) | g14V |
Receiver Output Voltage | b0.5V to (VCC a0.5V) |
Maximum Package Power Dissipation
@ a25§C | 9.5 mW/§C above a25§C | |
M Package 1190 mW, derate | ||
N Package 744 mW, derate | 6.0 mW/§C above a25§C | |
Storage Temperature Range |
| b65§C to a150§C |
Lead Temperature (Soldering 4 sec) | a260§C | |
Recommended Operating
Conditions
| Min | Typ | Max | Units |
Supply Voltage (VCC) | a4.75 | a5.0 | a5.25 | V |
Bus Voltage | b7 |
| a12 | V |
Operating Free Air Temperature (Ta) |
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DS36C278T | b40 | 25 | a85 | §C |
DS36C278 | 0 | 25 | a70 | §C |
Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2 and 3)
Symbol | Parameter | Conditions | Reference | Min | Typ | Max | Units | |
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DIFFERENTIAL DRIVER CHARACTERISTICS |
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VOD1 | Differential Output Voltage | IO e 0 mA (No Load) | (422) | 1.5 |
| 5.0 | V | |
VOD0 | Output Voltage | IO e 0 mA | 0 |
| 5.0 | V | ||
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VOD0* | Output Voltage | (Output to GND) | 0 |
| 5.0 | V | ||
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VOD2 | Differential Output Voltage | RL e 50X | (422) | Figure 1 | 2.0 | 2.8 |
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| (Termination Load) | RL e 27X | (485) | 1.5 | 2.3 | 5.0 | V | |
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DVOD2 | Balance of VOD2 | RL e 27X or 50X | (Note 4) | b0.2 | 0.1 | a0.2 | V | |
| lVOD2 b VOD2*l |
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VOD3 | Differential Output Voltage | R1 e 54X, R2 e 375X | Figure 2 | 1.5 | 2.0 | 5.0 | V | |
| (Full Load) | VTEST e b7V to a12V | ||||||
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VOC | Driver Common Mode | RL e 27X | (485) | Figure 1 | 0 |
| 3.0 | V |
| Output Voltage | RL e 50X | (422) | 0 |
| 3.0 | V | |
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DVOC | Balance of VOC | RL e 27X or | (Note 4) | b0.2 |
| a0.2 | V | |
| lVOC b VOC*l | RL e 50X | (422, 485) |
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IOSD | Driver Output | VO e a12V | (485) Figure 4 |
| 200 | a250 | mA | |
| Current | VO e b7V | (485) |
| b190 | b250 | mA | |
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RECEIVER CHARACTERISTICS |
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VTH | Differential Input High | VO e VOH, IO e b0.4V |
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| a0.035 | a0.2 | V |
| Threshold Voltage | b7V s VCM s a12V | (Note 5) |
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VTL | Differential Input Low | VO e VOL, IO e 0.4 mA | (422, 485) | b0.2 | b0.035 |
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| Threshold Voltage | b7V s VCM s a12V |
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VHST | Hysteresis | VCM e 0V | (Note 6) |
| 70 |
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RIN | Input Resistance | b7V s VCM s a12V | DS36C278T | 24 | 68 |
| kX | |
RIN | Input Resistance | b7V s VCM s a12V | DS36C278 | 48 | 68 |
| kX | |
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