HD74LVC138
HD74LVC138 is 3-to-8-line Decoder / Demultiplexer manufactured by Hitachi Semiconductor.
Description
The HD74LVC138 has three binary select inputs in a 16 pin package. If the device is enabled these inputs determine which one of the eight normally high outputs will go low. Two active low and one active high enables are provided to ease the cascading of decoders. 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) 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 Enable G1 X X L H H H H H H H H H: L: X: G2A X H X L L L L L L L L G2B H X X L L L L L L L L Select C X X X L L L L H H H H B X X X L L H H L L H H A X X X L H L H L H L H Y0 H H H L H H H H H H H Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H Y3 H H H H H H L H H H H Outputs Y4 H H H H H H H L H H H Y5 H H H H H H H H L H H Y6 H H H H H H H H H L H Y7 H H H H H H H H H H L
High level Low level Immaterial
Pin Arrangement
A 1 B 2 C 3 G2A 4 G2B 5 G1 6 Y7 7 GND 8 B C G2A G2B G1 Y7 Y6 A Y0 Y1 Y2 Y3 Y4 Y5
16 VCC 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 9 Y6
(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 Output voltage Output current VCC, GND current / pin Storage temperature VO IO I CC or IGND Tstg
- 0.5 to VCC +0.5 ±50 100
- 65 to +150 Unit V m A V m A m A V m A m A °C VO =
- 0.5 V VO = VCC +0.5 V VI =
- 0.5 V 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.
Remended Operating Conditions
Item Supply voltage Symbol VCC Ratings 1.5 to 5.5 2.0 to 5.5 Input / output voltage VI...