sn74lv245at octal bus transceiver with 3state outputs - CNC4PC

More documents

Recommendations

Info

SCLS605A − DECEMBER 2004 − MARCH 2005 description/ordering information (continued) To ensure the high-impedance state during power up or power down, OE should be tied to V CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. This device is fully specified for partial-power-down applications using I off . The I off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. OE FUNCTION TABLE (each transceiver) INPUTS DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation logic diagram (positive logic) DIR 1 19 OE A1 2 18 B1 To Seven Other Channels 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SCLS605A − DECEMBER 2004 − MARCH 2005 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) † Supply voltage range, V CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Input voltage range, V I (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Voltage range applied to any output in the high-impedance or power-off state, V O (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Output voltage range applied in the high or low state, V O (see Notes 1 and 2) . . . . . . −0.5 V to V CC + 0.5 V Input clamp current, I IK (V I < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20 mA Output clamp current, I OK (V O < 0 or V O > V CC ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous output current, I O (V O = 0 to V CC ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA Continuous current through V CC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA Package thermal impedance, θ JA (see Note 3): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W (see Note 3): DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92°C/W (see Note 3): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W (see Note 3): NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W (see Note 3): PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W (see Note 4): RGY package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37°C/W Storage temperature range, T stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. This value is limited to 5.5 V maximum. 3. The package thermal impedance is calculated in accordance with JESD 51-7. 4. The package thermal impedance is calculated in accordance with JESD 51-5. recommended operating conditions (see Note 5) MIN MAX UNIT VCC Supply voltage 4.5 5.5 V VIH High-level input voltage VCC = 4.5 V to 5.5 V 2 V VIL Low-level input voltage VCC = 4.5 V to 5.5 V 0.8 V VI Input voltage 0 5.5 V VO Output voltage High or low state 0 VCC 3-state 0 5.5 IOH High-level output current VCC = 4.5 V to 5.5 V −16 mA IOL Low-level output current VCC = 4.5 V to 5.5 V 16 mA ∆t/∆v Input transition rise or fall rate VCC = 4.5 V to 5.5 V 20 ns/V TA Operating free-air temperature −40 85 °C NOTE 5: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3
Page 1: Inputs Are TTL-Voltage Compatible 4
Page 5 and 6: SCLS605A − DECEMBER 2004 − MARC

sn74lv245at octal bus transceiver with 3state outputs - CNC4PC

Create successful ePaper yourself

Delete template?

Save as template?