HD74HCT238 Decoder/Demultiplexer Datasheet

HD74HCT238 Datasheet, PDF, Equivalent


Part Number

HD74HCT238

Description

3-to-8-line Decoder/Demultiplexer

Manufacture

Renesas

Total Page 6 Pages
Datasheet
Download HD74HCT238 Datasheet


HD74HCT238
HD74HCT238
3-to-8-line Decoder/Demultiplexer
REJ03D0661–0200
(Previous ADE-205-549)
Rev.2.00
Mar 30, 2006
Description
The HD74HCT238 has 3 binary select inputs (A, B, and C). If the device is enabled these inputs determined which one
of the eight normally high outputs will go low. Two active low and one active high enables (G1, G2A and G2B) are
provided to ease the cascading of decoders.
Features
High Speed Operation: tpd (A, B, C to Y) = 16.5 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 V to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74HCT238FPEL
SOP-16 pin (JEITA)
PRSP0016 DH-B
(FP-16DAV)
FP
PRSP0016 DG-A
HD74HCT238RPEL SOP-16 pin (JEDEC) (FP-16DNV)
RP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
EL (2,500 pcs/reel)
Function Table
Enable
Inputs
Select
Outputs
G1
G2A
G2B
C
B
A
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
XXHXXXL L L L L L L L
XHXXXXL L L L L L L L
LXXXXXLL L L LL L L
HL L L L LHL L L L L L L
HL L L LHLHL L L L L L
HL L LHL L LHL L L L L
HL L LHHL L LHL L L L
HL LHL L L L L LHL L L
HL LHLHL L L L LHL L
HL LHHL L L L L L LHL
HL LHHHL L L L L L LH
H : High level
L : Low level
X : Irrelevant
Rev.2.00 Mar 30, 2006 page 1 of 5

HD74HCT238
HD74HCT238
Pin Arrangement
Select
Inputs
A1
B2
C3
G2A 4
Enable
Inputs
G2B 5
G1 6
Outputs Y7 7
GND 8
A
B Y0
C Y1
G2A
Y2
G2B
Y3
G1 Y4
Y7 Y6 Y5
(Top view)
16 VCC
15 Y0
14 Y1
13 Y2
12 Y3 Outputs
11 Y4
10 Y5
9 Y6
Logic Diagram
G1
G2B
G2A
A
B
C
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Supply voltage range
VCC
–0.5 to +7.0
V
Input voltage
VIN
–0.5 to VCC + 0.5
V
Output voltage
Output current
DC current drain per VCC, GND
DC input diode current
DC output diode current
VOUT
IOUT
ICC, IGND
IIK
IOK
–0.5 to VCC + 0.5
±25
±50
±20
±20
V
mA
mA
mA
mA
Power dissipation per package
Storage temperature
PT
Tstg
500
–65 to +150
mW
°C
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.2.00 Mar 30, 2006 page 2 of 5


Features HD74HCT238 3-to-8-line Decoder/Demultipl exer REJ03D0661–0200 (Previous ADE-20 5-549) Rev.2.00 Mar 30, 2006 Descriptio n The HD74HCT238 has 3 binary select in puts (A, B, and C). If the device is en abled these inputs determined which one of the eight normally high outputs wil l go low. Two active low and one active high enables (G1, G2A and G2B) are pro vided to ease the cascading of decoders . Features • High Speed Operation: tpd (A, B, C to Y) = 16.5 ns typ (CL = 50 pF) • High Output Current: Fanout of 10 LSTTL Loads • Wide Operating V oltage: VCC = 2 V to 6 V • Low Input Current: 1 µA max • Low Quiescent S upply Current: ICC (static) = 4 µA max (Ta = 25°C) • Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation HD74HCT238FPEL SOP-16 pin (JEITA) PRS P0016 DH-B (FP-16DAV) FP PRSP0016 DG- A HD74HCT238RPEL SOP-16 pin (JEDEC) (FP -16DNV) RP Note: Please consult the s ales office for the above package availability. Taping Abbreviation (Quantity) .
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