74LVC245
74LVC245 is Octal Bidirectional Transceivers manufactured by Hitachi Semiconductor.
Description
The HD74LVC245A has eight buffers with three state outputs in a 20 pin package. When (T / R ) is high, data flows from the A inputs to the B outputs, and when (T / R ) is low, data flows from the B inputs to the A outputs. A and B bus are separated by making enable input ( OE) high level. Low voltage and high speed operation is suitable at the battery drive product (note type personal puter) and low power consumption extends the life of a battery for long time operation.
Features
- -
- -
- - VCC = 2.0 V to 5.5 V All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) All input outputs VI/O (Max.) = 5.5 V (@VCC = 0 V or output off state) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C) High output current ±24 m A (@VCC = 3.0 V to 5.5 V)
Function Table
Inputs OE L L H H: L: X: Z: High level Low level Immaterial High impedance T/R L H X Operation B data to A bus A data to B bus Z
HD74LVC245A
Pin Arrangement
T/R 1 A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 GND 10
20 VCC 19 OE 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7
(Top view)
Absolute Maximum Ratings
Item Supply voltage Input diode current Input voltage Output diode current Symbol VCC I IK VI I OK Ratings
- 0.5 to 6.0
- 50
- 0.5 to 6.0
- 50 50 Input / output voltage VI/O
- 0.5 to VCC +0.5
- 0.5 to 6.0 Output current VCC, GND current / pin Storage temperature IO I CC or IGND Tstg ±50 100
- 65 to 150 Unit V m A V m A m A V V m A m A °C VI =
- 0.5 V T / R, OE VO =
- 0.5 V VO = VCC +0.5 V Output "H" or "L" Output "Z" or VCC:OFF Conditions
Note: The absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
HD74LVC245A
Remended Operating Conditions
Item Supply voltage Symbol VCC Ratings 1.5 to 5.5 2.0 to 5.5 Input / output voltage VI VI/O 0 to 5.5 0 to V CC 0 to 5.5 Operating temperature Output current Ta I OH
- 40 to 85
- 12
- 24 I OL
- 1
- 2
Unit V V V V V °C m A m A...
