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74HC/HCT42
Datasheet
General description
The 74HC/HCT42 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 74HC/HCT42 decoders accept four active HIGH BCD inputs and provide 10 mutually exclusive active LOW outputs. The active LOW outputs facilitate addressing other MSI circuits with active LOW input enables.
The logic design of the '42' ensures that all outputs are HIGH when binary codes greater than nine are applied to the inputs.
The most significant input (A3) produces an useful inhibit function when the '42' is used as a 1-of-8 decoder. The A3 input can also be used as the data input in an 8-output demultiplexer application.
Features
- Mutually exclusive outputs
- 1-of-8 demultiplexing capability
- Outputs disabled for input codes above nine
- Output capability: standard
- ICC category: MSI
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| 74HC42D | 74HC42D | 9337 148 60652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | 74HC42D
| week 6, 2004 |
| 74HC42D | 74HC42D-T | 9337 148 60653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HC42D
| week 6, 2004 |
| 74HC42N | 74HC42N | 9336 697 90652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | 74HC42N
| Always Pb-free |
| 74HCT42D | 74HCT42D | 9337 153 40652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | 74HCT42D
| week 6, 2004 |
| 74HCT42D | 74HCT42D-T | 9337 153 40653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HCT42D
| week 6, 2004 |
| 74HCT42N | 74HCT42N | 9336 704 20652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | 74HCT42N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74HC42D | 9337 148 60652 | 0.3200 | EU | FARNELL | 900 | 10/9/2008 | Buy online | not available |
| NA | NEWARK | 900 | 10/9/2008 | Buy online | ||||
| 74HC42D | 9337 148 60653 | 0.3200 | Order samples | |||||
| 74HC42N | 9336 697 90652 | 0.3700 | NA | ARROW ELECTRONICS | 525 | 10/8/2008 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 6,743 | 10/9/2008 | Buy online | ||||
| EU | FARNELL | 270 | 10/9/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 1,964 | 10/9/2008 | Buy online | ||||
| NA | NEWARK | 270 | 10/9/2008 | Buy online | ||||
| 74HCT42D | 9337 153 40652 | 0.3700 | NA | DIGI-KEY CORPORATION | 131 | 10/9/2008 | Buy online | not available |
| 74HCT42D | 9337 153 40653 | 0.3700 | Order samples | |||||
| 74HCT42N | 9336 704 20652 | 0.3700 | Order samples |
Applications
- Driving LED displays
- Driving incandescent displays
- Driving fluorescent displays
- Driving LCD displays
- Driving gas discharge displays
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74HC42D | SOT109-1
(SO16) | BCD to Decimal Decoder (1-of-10) | 14@5V | 2.0-6.0 V | 16 | Low Power or Battery Applications | CMOS | +/- 5.2 mA |
| 74HC42N | SOT38-4
(DIP16) | BCD to Decimal Decoder (1-of-10) | 14@5V | 2.0-6.0 V | 16 | Low Power or Battery Applications | CMOS | +/- 5.2 mA |
| 74HCT42D | SOT109-1
(SO16) | BCD to Decimal Decoder (1-of-10); TTL Enabled | 17 | 4.5-5.5 V | 16 | Low Power | TTL | +/- 4 mA |
| 74HCT42N | SOT38-4
(DIP16) | BCD to Decimal Decoder (1-of-10); TTL Enabled | 17 | 4.5-5.5 V | 16 | Low Power | TTL | +/- 4 mA |
Similar products
74HC/HCT42 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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