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LS7273-20 Datasheet(PDF) 1 Page - LSI Computer Systems |
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LS7273-20 Datasheet(HTML) 1 Page - LSI Computer Systems |
1 / 6 page 7272-112912-1 FEATURES: • More feature-rich and cost-effective than the OL7272 and ET7273 • Pin to pin replaceable with the OL7272 and functionally equivalent to the ET7273 • Push-Pull or Open-Drain output drivers (LS7272) • Open-Drain output drivers only (LS7273) • Voltage Range: 4.5V – 30V (VDD – VSS) • 120mA Sink/Source output drive • Operating frequency up to 4 MHz • Thermal shutdown protection for output driver overload • Enable input with Thermal Shutdown disconnect feature • 1.5A dynamic peak output current drive • Outputs RS422A compatible • Inputs CMOS/TTL compatible with hysteresis • Output drivers fully connected or high-impedance state PART NUMBER ORDERING INFORMATION: This part is available in three package styles, DIP, SOIC, and TSSOP. For DIP packages: LS7272, LS7273, LS7272-20, LS7273-20 For SOIC packages: LS7272-S, LS7273-S, LS7272-S20, LS7273-S20 For TSSOP packages: LS7272-TS, LS7273-TS, LS7272TS20, LS7273TS20 DESCRIPTION: 30 VOLT QUAD-CHANNEL DIFFERENTIAL LINE DRIVER Nov 2012 PIN ASSIGNMENT – TOP VIEW FIGURE 1 FIGURE 2 1 4 5 7 8 2 3 6 A AO AO LOW BO BO B VSS 16 15 14 13 12 11 10 9 VDD D DO CO ENA DO CO C 1 4 5 7 8 2 3 6 A AO AO OPD BO BO B VSS 16 15 14 13 12 11 10 9 VDD D DO CO ENA DO CO C The LS7272/LS7273 are short-circuit proof Quad Differential Industrial Power Line Drivers. They can operate up to 30V and have a selectable thermal shutdown features. The Data inputs are TTL / CMOS compatible and can also be driven up to the supply voltage VDD. The ENA input can be used to place all the outputs in a high impedance state. For the LS7272 the OPD input is used to connect the outputs as push-pull drivers or open-drain drivers, where the outputs can be returned through external loads to a maximum voltage of VDD. For the LS7273, pin4 is LOW and is tied to ground. The outputs are open drain and the loads can be returned to any voltage between 4.5V and 30V independent of VDD. An internal 5V regulated supply is used to power the logic and level converter blocks. The thermal shutdown block located in the center of the IC can be disabled by setting the ENA input, Pin 12, to a voltage between 7.5V and 12V. Upon power-up, a Power-On-Reset (POR) circuit block forces all output drivers to the high- impedance state until the power supply voltage reaches a nominal 3.8V. Included in the POR circuit block is a hysteresis of 100mV such that if the power supply drops below 3.7V all output drivers are forced to the high-impedance state until the voltage rises above 3.8V. There is a built- in 5 μs delay for disabling the output drivers should the power supply drop below 3.7V. The output drivers are immediately enabled when the voltage rises above 3.8V. LS7272 LS7272-20 LS7273 LS7273-20 |
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