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74AHC138; 74AHCT138
Datasheet
(Product Specification)
28-Nov-07, 16 pages, 96 kB
General description
The 74AHC138; 74AHCT138 are high-speed Si-gate CMOS devices and are pin compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard No. 7A.
The 74AHC138; 74AHCT138 is a 3-to-8 line decoder/demultiplexer. It accepts three binary weighted address inputs (A0, A1 and A2) and, when enabled, provides eight mutually exclusive outputs (Y0 to Y7) that are LOW when selected.
There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.
This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four 74AHC138; 74AHCT138 devices and one inverter. The 74AHC138; 74AHCT138 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.
Features
- Balanced propagation delays
- All inputs have Schmitt-trigger action
- Demultiplexing capability
- Multiple input enable for easy expansion
- Ideal for memory chip select decoding
- Inputs accepts voltages higher than VCC
- For 74AHC138 only: operates with CMOS input levels
- For 74AHCT138 only: operates with TTL input levels
- ESD protection:
- HBM JESD22-A114E exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
- CDM JESD22-C101C exceeds 1000 V
- Multiple package options
- Specified from -40 Cel to +85 Cel and from -40 Cel to +125 Cel
Products/packages
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| 74AHC138BQ | 74AHC138BQ,115 | 9352 855 72115 | Volume production | SOT763-1
(DHVQFN16) | Reel Pack, SMD, 7" | Standard Marking | |
| 74AHC138D | 74AHC138D,112 | 9352 629 99112 | Volume production | SOT109 | Tube | Standard Marking | |
| 74AHC138D | 74AHC138D,118 | 9352 629 99118 | Volume production | SOT109 | Reel Pack, SMD, 13" | Standard Marking | |
| 74AHC138PW | 74AHC138PW,112 | 9352 630 00112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| 74AHC138PW | 74AHC138PW,118 | 9352 630 00118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking | |
| 74AHCT138BQ | 74AHCT138BQ,115 | 9352 855 73115 | Volume production | SOT763-1
(DHVQFN16) | Reel Pack, SMD, 7" | Standard Marking | |
| 74AHCT138D | 74AHCT138D,112 | 9352 629 97112 | Volume production | SOT109 | Tube | Standard Marking | |
| 74AHCT138D | 74AHCT138D,118 | 9352 629 97118 | Volume production | SOT109 | Reel Pack, SMD, 13" | Standard Marking | |
| 74AHCT138PW | 74AHCT138PW,112 | 9352 629 98112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| 74AHCT138PW | 74AHCT138PW,118 | 9352 629 98118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking |
Quality/reliability/chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| 74AHC138BQ | 74AHC138BQ,115 | 74AHC138BQ |
| Always Pb-free | 6,62 | 1,51E+08 | 1 | |
| 74AHC138D | 74AHC138D,112 | 74AHC138D |
| week 35, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74AHC138D | 74AHC138D,118 | 74AHC138D |
| week 35, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74AHC138PW | 74AHC138PW,112 | 74AHC138PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74AHC138PW | 74AHC138PW,118 | 74AHC138PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74AHCT138BQ | 74AHCT138BQ,115 | 74AHCT138BQ |
| Always Pb-free | 6,62 | 1,51E+08 | 1 | |
| 74AHCT138D | 74AHCT138D,112 | 74AHCT138D |
| week 35, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74AHCT138D | 74AHCT138D,118 | 74AHCT138D |
| week 35, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74AHCT138PW | 74AHCT138PW,112 | 74AHCT138PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74AHCT138PW | 74AHCT138PW,118 | 74AHCT138PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| 74AHC138BQ | 9352 855 72115 | 74AHC138BQ,115 | NA | ARROW ELECTRONICS | 3,000 | 11/19/2009 | Buy online | not available | ||
| 74AHC138D | 9352 629 99112 | 74AHC138D,112 | 0.1900 | NA | ARROW ELECTRONICS | 939 | 11/19/2009 | Buy online | not available | |
| 74AHC138D | 9352 629 99118 | 74AHC138D,118 | 0.1900 | NA | ARROW ELECTRONICS | 939 | 11/19/2009 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 4,920 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 320 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 42,500 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 320 | 11/20/2009 | Buy online | ||||||
| ASIA | WPI | 5,000 | 2500 | 11/19/2009 | Buy online | |||||
| 74AHC138PW | 9352 630 00112 | 74AHC138PW,112 | 0.1900 | not available | ||||||
| 74AHC138PW | 9352 630 00118 | 74AHC138PW,118 | 0.1900 | NA | MOUSER ELECTRONICS | 2,500 | 11/20/2009 | Buy online | Order samples | |
| NA | FUTURE ELECTRONICS | 16,920 | 11/19/2009 | Buy online | ||||||
| NA | ARROW ELECTRONICS | 17,500 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 2,500 | 11/20/2009 | Buy online | ||||||
| 74AHCT138BQ | 9352 855 73115 | 74AHCT138BQ,115 | NA | ARROW ELECTRONICS | 3,000 | 11/19/2009 | Buy online | not available | ||
| 74AHCT138D | 9352 629 97112 | 74AHCT138D,112 | 0.1900 | not available | ||||||
| 74AHCT138D | 9352 629 97118 | 74AHCT138D,118 | 0.1900 | ASIA | WPI | 2,500 | 2500 | 11/19/2009 | Buy online | not available |
| 74AHCT138PW | 9352 629 98112 | 74AHCT138PW,112 | 0.1900 | not available | ||||||
| 74AHCT138PW | 9352 629 98118 | 74AHCT138PW,118 | 0.1900 | NA | MOUSER ELECTRONICS | 100 | 11/20/2009 | Buy online | not available | |
| NA | AVNET ELECTRONICS MARKETING | 40,000 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 100 | 11/20/2009 | Buy online | ||||||
| ASIA | WPI | 2,500 | 2500 | 11/19/2009 | Buy online |
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|
| 74AHC138BQ | SOT763-1
(DHVQFN16) | 3-to-8 Line Decoder/Demultiplexer; Inverting | 4.4@5V | 2.0-5.5 V | Low Power or Battery Applications | CMOS | +/- 8 mA |
| 74AHC138D | SOT109
| 3-to-8 Line Decoder/Demultiplexer; Inverting | 4.4@5V | 2.0-5.5 V | Low Power or Battery Applications | CMOS | +/- 8 mA |
| 74AHC138PW | SOT403-1
(TSSOP16) | 3-to-8 Line Decoder/Demultiplexer; Inverting | 4.4@5V | 2.0-5.5 V | Low Power or Battery Applications | CMOS | +/- 8 mA |
| 74AHCT138D | SOT109
| 3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled | 4.4 | 4.5-5.5 V | Low Power | TTL | +/- 8 mA |
| 74AHCT138PW | SOT403-1
(TSSOP16) | 3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled | 4.4 | 4.5-5.5 V | Low Power | TTL | +/- 8 mA |
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74AHC138; 74AHCT138
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