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D74HC138C の電気的特性と機能

D74HC138CのメーカーはETCです、この部品の機能は「 CD74HC138C」です。


製品の詳細 ( Datasheet PDF )

部品番号 D74HC138C
部品説明 CD74HC138C
メーカ ETC
ロゴ ETC ロゴ 




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D74HC138C Datasheet, D74HC138C PDF,ピン配置, 機能
Data sheet acquired from Harris Semiconductor
SCHS147A
October 1997 - Revised February 1999
CD74HC138, CD74HCT138,
CD74HC238, CD74HCT238
High Speed CMOS Logic 3-to-8 Line Decoder/
Demultiplexer Inverting and Non-Inverting
Features
[ /Title
(CD74
HC138
• Select One Of Eight Data Outputs
Active Low for 138, Active High for 238
• l/O Port or Memory Selector
• Three Enable Inputs to Simplify Cascading
, • Typical Propagation Delay
CwwDw7.D4ataSheet4U.CcoLm= 15pF, TA = 25oC
of
13ns
at
VCC
=
5V,
HCT13
8,
CD74
HC238
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
,
CD74
HCT23
8)
/Sub-
ject
(High
Speed
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il 1µA at VOL, VOH
Pinout
CD74HC138, CD74HCT138, CD74HC238, CD74HCT238
(PDIP, SOIC)
TOP VIEW
A0 1
A1 2
A2 3
E1 4
E2 5
E3 6
(Y7) Y7 7
GND 8
16 VCC
15 Y0 (Y0)
14 Y1 (Y1)
13 Y2 (Y2)
12 Y3 (Y3)
11 Y4 (Y4)
10 Y5 (Y5)
9 Y6 (Y6)
Signal names in parentheses are for ’HC238 and ’HCT238.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 1999, Texas Instruments Incorporated
1

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D74HC138C pdf, ピン配列
CD74HC138, CD74HCT138, CD74HC238, CD74HCT238
TRUTH TABLE CD74HC138, CD74HCT138
INPUTS
ENABLE
ADDRESS
OUTPUTS
E3 E2 E1 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
HL LHL LHHHHLHHH
HL LHLHHHHHHLHH
HL LHHLHHHHHHLH
HL LHHHHHHHHHHL
NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
TRUTH TABLE CD74HC238, CD74HCT238
www.DataSheet4U.com ENABLE
INPUTS
ADDRESS
OUTPUTS
E3 E2 E1 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
XXHXXXL L L L L L L L
LXXXXXL L L L L L L L
XHXXXXL L L L L L 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
NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
3


3Pages


D74HC138C 電子部品, 半導体
Switching Specifications Input tr, tf = 6ns (Continued)
PARAMETER
Enable to Output
HC/HCT138
TEST
25oC
SYMBOL CONDITIONS VCC (V) MIN TYP MAX
tPLH, tPHL CL = 50pF
2 - - 150
4.5 - - 30
-40oC TO
85oC
-55oC TO 125oC
MIN MAX MIN MAX UNITS
- 190 -
265 ns
- 38
-
53 ns
6
- - 26 - 33 -
45 ns
Output Transition Time
(Figure 1)
tTLH, tTHL CL = 50pF
2 - - 75 - 95 - 110 ns
4.5 - - 15 - 19 -
22 ns
6
- - 13 - 16 -
19 ns
Power Dissipation
www.DataSheet4UC.acpoamcitance, (Notes 5, 6)
CPD CL = 15pF
5 - 67 - - - -
- pF
Input Capacitance
HCT TYPES
Propagation Delay
Address to Output
Enable to Output
HC/HCT138
CIN
-
-
- - 10 - 10 -
10 pF
tPLH, tPHL CL = 50pF
CL = 15pF
tPLH, tPHL CL = 50pF
4.5 - - 35 - 44 -
5 - 14 - - - -
4.5 - - 35 - 44 -
53 ns
- ns
53 ns
Enable to Output
HC/HCT238
tPLH, tPHL CL = 15pF
4.5 - - 40 - 50 -
60 ns
Output Transition Time
(Figure 2)
tTLH, tTHL CL = 50pF
4.5 - - 15 - 19 -
22 ns
Power Dissipation
Capacitance, (Notes 5, 6)
CPD CL = 15pF
5 - 67 - - - -
- pF
Input Capacitance
CIN - - - - 10 - 10
NOTES:
5. CPD is used to determine the dynamic power consumption, per gate.
6. PD = VCC2 fi (CPD + CL) where: fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.
-
10 pF
Test Circuits and Waveforms
tr = 6ns
INPUT
90%
50%
10%
tf = 6ns
VCC
GND
tTHL
INVERTING
OUTPUT
tPHL
tTLH
90%
50%
10%
tPLH
FIGURE 7. HC AND HCU TRANSITION TIMES AND PROPAGA-
TION DELAY TIMES, COMBINATION LOGIC
tr = 6ns
INPUT
2.7V
1.3V
0.3V
tf = 6ns
3V
GND
tTHL
INVERTING
OUTPUT
tPHL
tTLH
90%
1.3V
10%
tPLH
FIGURE 8. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
6

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部品番号部品説明メーカ
D74HC138C

CD74HC138C

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