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74VHCT238A 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 74VHCT238A은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 74VHCT238A 자료 제공

부품번호 74VHCT238A 기능
기능 3 TO 8 LINE DECODER
제조업체 STMicroelectronics
로고 STMicroelectronics 로고


74VHCT238A 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




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74VHCT238A 데이터시트, 핀배열, 회로
® 74VHCT238A
3 TO 8 LINE DECODER
s HIGH SPEED: tPD = 8 ns (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
s COMPATIBLE WITH TTL OUTPUTS:
VIH = 2V (MIN), VIL = 0.8V (MAX)
s POWER DOWN PROTECTION ON INPUTS &
OUTPUTS
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH tPHL
s OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 238
s IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74VHCT238A is an advanced high-speed
CMOS 3 TO 8 LINE DECODER fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS technology.
If the device is enabled, 3 binary select inputs (A,
B and C) determine which one of the outputs will
go high. If enable input G1 is held low or either
SOP
TSSOP
PACKAGE
SOP
TSSOP
ORDER CODES
T UB E
T&R
74VHCT238AM 74VHCT238AMTR
74VHCT238ATTR
G2A or G2B is held high, decoding function is
inhibited and all the 8 outputs go to low.
Three enable inputs are provided to ease
cascade connection and application of this
address decoders for memory systems.
Power down protection is provided on all inputs
and outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
device can be used to interface 5V to 3V.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
March 2000
1/8




74VHCT238A pdf, 반도체, 판매, 대치품
74VHCT238A
AC ELECTRICAL CHARACTERISTICS (Input tr = tf =3 ns)
Symb ol
Parameter
tPLH Propagation Delay
tPHL Time A, B, C to Y
tPLH Propagation Delay
tPHL Time G1 to Y
tPLH Propagation Delay
tPHL Time G2A, G2B to Y
(*) Voltage range is 5V ± 0.5V
Test Condition
V CC
( V)
CL
(pF)
5.0(*)
5.0(*)
15
50
5.0(*)
5.0(*)
15
50
5.0(*)
5.0(*)
15
50
Value
TA = 25 oC
Min. Typ. Max.
8.0 12.3
10.5 15.8
8.1 12.8
10.6 16.3
8.1 12.3
10.6 15.8
-40 to 85 oC
Min . Max.
1.0 14.5
1.0 18.0
1.0 15.0
1.0 18.5
1.0 14.5
1.0 18.0
Unit
ns
ns
ns
CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
Test Conditions
Value
Un it
TA = 25 oC
-40 to 85 oC
Min. Typ . Max. Min . Max.
CIN Input Capacitance
4 10
10 pF
CPD Power Dissipation
Capacitance (note 1)
37 pF
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD VCC fIN + ICC
TEST CIRCUIT
CL = 15/50 pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50)
4/8

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74VHCT238A 전자부품, 판매, 대치품
DIM.
A
A1
A2
b
c
D
E
E1
e
K
L
74VHCT238A
TSSOP16 MECHANICAL DATA
MIN.
0.05
0.85
0.19
0.09
4.9
6.25
4.3
0o
0.50
mm
TYP.
0.10
0.9
5
6.4
4.4
0.65 BSC
4o
0.60
MAX.
1.1
0.15
0.95
0.30
0.20
5.1
6.5
4.48
8o
0.70
MIN.
0.002
0.335
0.0075
0.0035
0.193
0.246
0.169
0o
0.020
inch
TYP.
0.004
0.354
0.197
0.252
0.173
0.0256 BSC
4o
0.024
MAX.
0.433
0.006
0.374
0.0118
0.0079
0.201
0.256
0.176
8o
0.028
A A2
A1 b
e
D
PIN 1 IDENTIFICATION
1
KL
cE
E1
7/8

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관련 데이터시트

부품번호상세설명 및 기능제조사
74VHCT238A

3 TO 8 LINE DECODER

STMicroelectronics
STMicroelectronics

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