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參數(shù)資料
| 型號(hào)： | 74LV138 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 3-to-8 line decoder/multiplexer; inverting |
| 中文描述： | 3至8線路解碼器/復(fù)用器;反相 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 116K |
| 代理商： | 74LV138 |
Philips Semiconductors
Product specification
74LV138
3-to-8 line decoder/demultiplexer; inverting
2
1998 Apr 28
853–1903 19290
FEATURES
Wide operating voltage: 1.0 to 5.5 V
Optimized for low voltage applications: 1.0 to 3.6 V
Accepts TTL input levels between V
CC
= 2.7 V and V
CC
= 3.6 V
Typical V
OLP
(output ground bounce) < 0.8 V at V
CC
= 3.3 V,
T
amb
= 25
°
C
Typical V
OHV
(output V
OH
undershoot) > 2 V at V
CC
= 3.3 V,
T
amb
= 25
°
C
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active LOW mutually exclusive outputs
Output capability: standard
I
CC
category: MSI
DESCRIPTION
The 74LV138 is a low-voltage Si-gate CMOS device that is pin and
function compatible with 74HC/HCT138.
The 74LV138 accepts three binary weighted address inputs (A
0
, A
1
,
A
2
) and when enabled, provide 8 mutually exclusive active LOW
outputs (Y
0
to Y
7
).
The 74LV138 features three enable inputs: two active LOW (E
1
, and
E
2
) and one active HIGH (E
3
). Every output will be HIGH unless E
1
and E
2
are LOW and E
3
is HIGH.
This multiple enable function allows easy parallel expansion of the
74LV138 to a 1-of-32 (5 lines to 32 lines) decoder with just four
74LV138 ICs and one inverter. The 74LV138 can be used as an
eight output demultiplexer by using one of the active LOW enable
inputs as the data input and the remaining enable inputs as strobes.
Unused enable inputs must be permanently tied to their appropriate
active HIGH or LOW state. The 74LV138 is identical to the 74LV238
but has non-inverting (true) outputs.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
≤
2.5 ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL
/t
PLH
Propagation delay
An to Yn,
E3 to Yn, En to Yn
C
L
= 15 pF;
V
CC
= 3.3 V
12
14
ns
ns
C
I
Input capacitance
3.5
pF
C
PD
Power dissipation capacitance per
package
V
CC
= 3.3 V
V
I
= GND to V
CC1
45
pF
NOTES:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W)
P
D
= C
PD
×
V
CC2
×
f
i
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz; C
L
= output load capacitance in pF;
f
o
= output frequency in MHz; V
= supply voltage in V;
(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
–40
°
C to +125
°
C
–40
°
C to +125
°
C
–40
°
C to +125
°
C
–40
°
C to +125
°
C
OUTSIDE NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
16-Pin Plastic DIL
74LV138 N
74LV138 N
SOT38-4
16-Pin Plastic SO
74LV138 D
74LV138 D
SOT109-1
16-Pin Plastic SSOP Type II
74LV138 DB
74LV138 DB
SOT338-1
16-Pin Plastic TSSOP Type I
74LV138 PW
74LV138PW DH
SOT403-1
PIN CONFIGURATION
SV00524
1
2
3
4
5
6
7
A
0
A
1
A
2
E
1
E
2
E
3
Y
7
V
CC
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
14
13
12
11
10
9
GND
Y
6
8
16
15
PIN DESCRIPTION
PIN NUMBER
SYMBOL
FUNCTION
1, 2, 3
A
0
to A
2
E
1
to E
2
E
3
Address inputs
4, 5
Enable inputs (active LOW)
6
Enable inputs (active HIGH)
15, 14, 13, 12,
11, 10, 9, 7
Y
0 to
Y
7
Outputs
8
GND
Ground (0 V)
16
V
CC
Positive supply voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74LV138A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS |
| 74LV138BQ | 制造商:NXP Semiconductors 功能描述:IC 3-8 LINE DECODER/DEMUX DHVQFN16 制造商:NXP Semiconductors 功能描述:IC, 3-8 LINE DECODER/DEMUX, DHVQFN16, Logic Type:3-to-8 Line Decoder / Demultipl |
| 74LV138BQ,115 | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3.3V 3-8 LINE RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74LV138BQ-G | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3.3V 3-8 LINE DECODE/DEMUX INV RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74LV138D | 制造商:NXP Semiconductors 功能描述: 制造商:NXP Semiconductors 功能描述:Cut Tape 制造商:PHILIPS-SEMI 功能描述: |
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