HD74LV245A

HD74LV245A Octal Bus Transceivers with 3-state Outputs ADE-205-247 (Z) 1st Edition March 1999 Description The HD74LV245A has eight buffers with three-state outputs in a 20-pin package. When DIR is high, data is transferred from the A inputs to the B outputs, and when DIR is low, data is transferred from the B inputs to the A outputs. The A and B buses are separated by making the enable input (OE) high level. Lowvoltage operation is suitable for battery-powered products (e.g., notebook computers), and the low power consumption extends the battery life. Features VCC = 2.0 V to 5.5 V operation All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) All outputs VO (Max.) = 5.5 V (@VCC = 0 V) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C) Output current ±8 mA (@VCC = 3.0 V to 3.6 V), ±16 mA (@VCC = 4.5 V to 5.5 V) Function Table Inputs OE L L H Note: H: High level L: Low level X: Immaterial DIR L H X Operation B data to A bus A data to B bus Isolation HD74LV245A Pin Arrangement DIR 1 A1 A2 2 3 20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 A3 4 A4 A5 A6 A7 A8 5 6 7 8 9 GND 10 (Top view) 2 HD74LV245A Absolute Maximum Ratings Item Supply voltage range Input voltage range* 1 1, 2 Symbol VCC VI VO Ratings –0.5 to 7.0 –0.5 to 7.0 –0.5 to VCC + 0.5 –0.5 to 7.0 Unit V V V Conditions Output voltage range* * Output: H or L VCC: OFF or Output: Z Input clamp current Output clamp curr...