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PDF 74HC138 Data sheet ( Hoja de datos )
| Número de pieza | 74HC138 | |
| Descripción | 3-to-8 line decoder/demultiplexer | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
Rev. 6 — 28 December 2015
Product data sheet
1. General description
The 74HC138; 74HCT138 decodes three binary weighted address inputs (A0, A1 and A2)
to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs
(E1, E2 and E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.
This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines)
decoder with just four ‘138’ ICs and one inverter. The ‘138’ 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. Inputs include clamp diodes. This enables the use of
current limiting resistors to interface inputs to voltages in excess of VCC.
2. Features and benefits
Complies with JEDEC standard no. 7A
Input levels:
For 74HC138: CMOS level
For 74HCT138: TTL level
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active LOW mutually exclusive outputs
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 C to +85 C and from 40 C to +125 C
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range Name
74HC138D
40 C to +125 C SO16
74 HCT138D
74HC138DB
40 C to +125 C SSOP16
74HCT138DB
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic shrink small outline package; 16 leads;
body width 5.3 mm
Version
SOT109-1
SOT338-1
1 page  
NXP Semiconductors
74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
8. Recommended operating conditions
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
Conditions
VCC
VI
VO
Tamb
t/V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
9. Static characteristics
74HC138
Min Typ Max
2.0 5.0 6.0
0 - VCC
0 - VCC
40 +25 +125
- - 625
- 1.67 139
- - 83
74HCT138
Min Typ Max
4.5 5.0 5.5
0 - VCC
0 - VCC
40 +25 +125
---
- 1.67 139
---
Unit
V
V
V
C
ns/V
ns/V
ns/V
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
Tamb = 25 C
Tamb = 40 C to
+85 C
Min Typ Max Min Max
74HC138
VIH HIGH-level VCC = 2.0 V
input voltage VCC = 4.5 V
1.5 1.2
3.15 2.4
-
-
1.5
3.15
-
-
VCC = 6.0 V
4.2 3.2 -
4.2
-
VIL LOW-level VCC = 2.0 V
input voltage VCC = 4.5 V
- 0.8 0.5
- 2.1 1.35
-
-
0.5
1.35
VCC = 6.0 V
- 2.8 1.8
-
1.8
VOH HIGH-level
VI = VIH or VIL
output voltage
IO = 20 A; VCC = 2.0 V 1.9 2.0
-
1.9
-
IO = 20 A; VCC = 4.5 V 4.4 4.5 -
4.4
-
IO = 20 A; VCC = 6.0 V 5.9 6.0 -
5.9
-
IO = 4.0 mA; VCC = 4.5 V 3.98 4.32 -
3.84
-
IO = 5.2 mA; VCC = 6.0 V 5.48 5.81 -
5.34
-
VOL LOW-level
VI = VIH or VIL
output voltage
IO = 20 A; VCC = 2.0 V
- 0 0.1
-
0.1
IO = 20 A; VCC = 4.5 V
- 0 0.1
-
0.1
IO = 20 A; VCC = 6.0 V
- 0 0.1
-
0.1
IO = 4.0 mA; VCC = 4.5 V
- 0.15 0.26
-
0.33
IO = 5.2 mA; VCC = 6.0 V
- 0.16 0.26
-
0.33
II input leakage VI = VCC or GND;
current
VCC = 6.0 V
- - 0.1 -
1.0
ICC
supply current VI = VCC or GND; IO = 0 A;
-
- 8.0
-
VCC = 6.0 V
80
Tamb = 40 C to Unit
+125 C
Min Max
1.5 - V
3.15 - V
4.2 - V
- 0.5 V
- 1.35 V
- 1.8 V
1.9 - V
4.4 - V
5.9 - V
3.7 - V
5.2 - V
- 0.1 V
- 0.1 V
- 0.1 V
- 0.4 V
- 0.4 V
- 1.0 A
- 160 A
74HC_HCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 28 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
5 of 18
5 Page 
NXP Semiconductors
74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
12. Package outline
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Fig 9. Package outline SOT109-1 (SO16)
74HC_HCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 28 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
11 of 18
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| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet 74HC138.PDF ] | |
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