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LT1791ACS Datasheet(PDF) 5 Page - Linear Technology |
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LT1791ACS Datasheet(HTML) 5 Page - Linear Technology |
5 / 12 page 5 LT1785/LT1785A LT1791/LT1791A TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Temperature Driver Propagation Delay vs Temperature LT1791 Driver Output Leakage DE = 0V TEMPERATURE ( °C) –40 1000 900 800 700 600 500 400 300 200 100 0 0 40 60 1785/91 G04 –20 20 80 100 HL LH 1mA/DIV – 60V 60V LT1791 Receiver Input Current vs VIN 200 µA/DIV – 60V 60V VIN 1785/91 G06 – 60V 60V 1mA/DIV VA, VB 1785/91 G07 VOUT 1785/91 G05 TEMPERATURE ( °C) –40 7 6 5 4 3 2 1 0 0 40 60 1785/91 G08 –20 20 80 100 RECEIVER ONLY STANDBY DRIVER AND RECEIVER ON Receiver Propagation Delay vs Differential Input Voltage LT1785 Input Characteristics Pins A or B; DE = RE = 0V VIN DIFFERENTIAL (V) 0 700 600 500 400 300 200 100 0 1785/91 G09 2 5 1 34 HL VCM = 12V HL VCM = –7V LH VCM = –7V LH VCM = 12V PIN FUNCTIONS RO: Receiver Output. TTL level logic output. If the receiver is active (RE pin low), RO is high if receiver input A ≥ B by 200mV. If A ≤ B by 200mV, then RO will be low. RO assumes a high impedance output state when RE is high or the part is powered off. RO is protected from output shorts from ground to 6V. RE: Receiver Output Enable. TTL level logic input. A logic low on RE enables normal operation of the receiver output RO. A logic high level at RE places the receiver output pin RO into a high impedance state. If receiver enable RE and driver enable DE are both in the disable state, the circuit goes to a low power shutdown state. Placing either RE or DE into its active state brings the circuit out of shutdown. Shutdown state is not entered until a 3 µs delay after both RE and DE are disabled, allowing for logic skews in toggling between transmit and receive modes of opera- tion. For CAN bus applications, RE should be tied low to prevent the circuit from entering shutdown. DE: Driver Output Enable. TTL level logic input. A logic high on DE enables normal operation of the driver outputs (Y and Z on LT1791, A and B on LT1785). A logic low level at DE places the driver output pins into a high impedance |
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