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HD74LVC138
3-to-8-line Decoder / Demultiplexer
REJ03D0349-0300Z (Previous ADE-205-068B (Z)) Rev.3.00 Jul. 23, 2004
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 computer) 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 = 25C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25C) High output current 24 mA (@VCC = 3.0 V to 5.5 V) Ordering Information
Package Type SOP-16 pin (JEITA) TSSOP-16 pin Package Code FP-16DAV TTP-16DAV Package Abbreviation FP T Taping Abbreviation (Quantity) EL (2,000 pcs/reel) ELL (2,000 pcs/reel)
Part Name HD74LVC138FPEL HD74LVC138TELL
Note: Please consult the sales office for the above package availability.
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 Outputs 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 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
Rev.3.00 Jul. 23, 2004 page 1 of 5
HD74LVC138
Pin Arrangement
A1 B2 C3 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 Output voltage Output current VCC, GND current / pin Storage temperature Symbol VCC IIK VI IOK VO IO ICC or IGND Tstg Ratings -0.5 to 6.0 -50 -0.5 to 6.0 -50 50 -0.5 to VCC +0.5 50 100 -65 to +150 Unit V mA V mA V mA mA C Conditions VI = -0.5 V VO = -0.5 V VO = VCC +0.5 V
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.
Rev.3.00 Jul. 23, 2004 page 2 of 5
HD74LVC138
Recommended Operating Conditions
Item Supply voltage Input / output voltage Operating temperature Output current Symbol VCC VI VO Ta IOH IOL Input rise / fall time *1 tr, tf Ratings 1.5 to 5.5 2.0 to 5.5 0 to 5.5 0 to VCC -40 to 85 -12 -24*2 12 24*2 10 Unit V V V C mA mA ns/V Conditions Data retention At operation G, A, B, C Y0 to Y7 VCC = 2.7 V VCC = 3.0 V to 5.5 V VCC = 2.7 V VCC = 3.0 V to 5.5 V
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
2. Duty cycle 50%
Electrical Characteristics
Ta = -40 to 85C Item Input voltage Symbol VIH VIL Output voltage VOH VCC (V) 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 5.5 2.7 3.0 3.0 4.5 2.7 to 5.5 2.7 3.0 4.5 0 to 5.5 5.5 3.0 to 3.6 Min 2.0 VCCx0.7 -- -- VCC -0.2 2.2 2.4 2.0 3.8 -- -- -- -- -- -- -- Max -- -- 0.8 VCCx0.3 -- -- -- -- -- 0.2 0.4 0.55 0.55 5.0 20 500 Unit V V V IOH = -100 A IOH = -12 mA IOH = -24 mA V IOL = 100 A IOL = 12 mA IOL = 24 mA VIN = 5.5 V or GND VIN = VCC or GND VIN = one input at(VCC -0.6)V, other inputs at VCC or GND Test Conditions
VOL
Input current Quiescent supply current
IIN ICC ICC
A A A
Switching Characteristics
Ta = -40 to 85C Item Propagation delay time Symbol tPLH tPHL CIN CO VCC (V) 2.7 3.30.3 5.00.5 2.7 2.7 Min -- 1.5 -- -- -- Typ 7.0 5.0 3.5 3.0 15.0 Max 10.0 9.0 7.5 -- -- Unit ns From (Input) To (Output)
G, A, B, C Y0 to Y7
Input capacitance Output capacitance
pF pF
Rev.3.00 Jul. 23, 2004 page 3 of 5
HD74LVC138
Test Circuit
VCC VCC
A
See Function Table
Input
B C G1 G 2A G 2B
Y 0 to Y 7 CL = 50 pF 450 50 Scope
Output
Pulse Generator Zout = 50
Note:
1. CL includes probe and jig capacitance.
Waveforms
tr Input 10 % t PLH In phase output t PHL 90 % Vref 90 % Vref 10 % t PHL VOH Vref Vref VOL t PLH VOH Out of phase output Vref Vref VOL Symbol VIH Vref VCC = 2.7 V, 3.30.3 V VCC = 5.00.5 V 2.7 V VCC 1.5 V 50%VCC tf VIH GND
Notes:
1. tr = 2.5 ns, tf = 2.5 ns 2. Input waveform : PRR = 10 MHz, duty cycle 50%
Rev.3.00 Jul. 23, 2004 page 4 of 5
HD74LVC138
Package Dimensions
As of January, 2003
10.06 10.5 Max 16 9
Unit: mm
1
*0.20 0.05
8
0.80 Max
5.5
0.20 7.80 + 0.30 -
2.20 Max
1.15
1.27
0.10 0.10
0 - 8
0.70 0.20
*0.40 0.06
0.15
0.12 M
Package Code JEDEC JEITA Mass (reference value) FP-16DAV -- Conforms 0.24 g
*Ni/Pd/Au plating
As of January, 2003
Unit: mm
5.00 5.30 Max 16 9
1
*0.20 0.05
8 0.65 0.13 M 0.65 Max 6.40 0.20 0 - 8 0.50 0.10 1.0
4.40
*0.15 0.05
1.10 Max
0.10
0.07 +0.03 -0.04
*Ni/Pd/Au plating
Package Code JEDEC JEITA Mass (reference value)
TTP-16DAV -- -- 0.05 g
Rev.3.00 Jul. 23, 2004 page 5 of 5
Sales Strategic Planning Div.
Keep safety first in your circuit designs!
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