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74HC/HCT147
General description
The 74HC/HCT147 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/HCT147 9-input priority encoders accept data from nine active LOW inputs (A0 to A8) and provide a binary representation on the four active LOW outputs (Y0 to Y3). A priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with input line A8 having the highest priority.
The devices provide the 10-line to 4-line priority encoding function by use of the implied decimal 'zero'. The 'zero' is encoded when all nine data inputs are HIGH, forcing all four outputs HIGH.
Features
- Encodes 10-line decimal to 4-line BCD
- Useful for 10-position switch encoding
- Used in code converters and generators
- 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 |
|---|---|---|---|---|---|---|---|---|
| 74HC147D | 74HC147D | 9337 145 00652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | 74HC147D
| week 6, 2004 |
| 74HC147D | 74HC147D-T | 9337 145 00653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HC147D
| week 6, 2004 |
| 74HC147DB | 74HC147DB | 9351 896 70112 | Volume production | SOT338-1
(SSOP16) | Tube | Standard Marking | 74HC147DB
| week 12, 2005 |
| 74HC147DB | 74HC147DB-T | 9351 896 70118 | Volume production | SOT338-1
(SSOP16) | Reel Pack, SMD, 13" | Standard Marking | 74HC147DB
| week 12, 2005 |
| 74HC147N | 74HC147N | 9336 693 10652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | 74HC147N
| Always Pb-free |
| 74HCT147D | 74HCT147D | 9337 149 80652 | Volume production | SOT109-1
(SO16) | Bulk Pack, CECC | Standard Marking | 74HCT147D
| week 6, 2004 |
| 74HCT147D | 74HCT147D-T | 9337 149 80653 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HCT147D
| week 6, 2004 |
| 74HCT147N | 74HCT147N | 9336 699 40652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | 74HCT147N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74HC147D | 9337 145 00652 | 0.3400 | NA | ARROW ELECTRONICS | 161 | 8/5/2008 | Buy online | not available |
| NA | AVNET ELECTRONICS MARKETING | 1,888 | 8/5/2008 | Buy online | ||||
| 74HC147D | 9337 145 00653 | 0.3400 | Order samples | |||||
| 74HC147DB | 9351 896 70112 | 0.3400 | NA | DIGI-KEY CORPORATION | 455 | 8/5/2008 | Buy online | not available |
| 74HC147DB | 9351 896 70118 | 0.3400 | Order samples | |||||
| 74HC147N | 9336 693 10652 | 0.3900 | NA | ARROW ELECTRONICS | 1,950 | 8/5/2008 | Buy online | Order samples |
| NA | FUTURE ELECTRONICS | 1,793 | 8/5/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 1,900 | 8/4/2008 | Buy online | ||||
| 74HCT147D | 9337 149 80652 | 0.3700 | NA | DIGI-KEY CORPORATION | 1,045 | 8/5/2008 | Buy online | not available |
| 74HCT147D | 9337 149 80653 | 0.3700 | NA | AVNET ELECTRONICS MARKETING | 2,500 | 8/5/2008 | Buy online | Order samples |
| NA | MOUSER ELECTRONICS | 2,500 | 8/4/2008 | Buy online | ||||
| 74HCT147N | 9336 699 40652 | 0.3900 | Order samples |
Applications
- Driving LED displays
- Driving incandescent displays
- Driving fluorescent displays
- Driving LCD displays
- Driving gas discharge displays
Technical documents
Support Documents
HCT_USER_GUIDE;
HC/T User Guide (1997-11-01)
75015399;
Power management in notebook omputers (2005-12-01)
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|
| 74HC147D | SOT109-1
(SO16) | 10-to-4 Line Priority Encoder | 15@5V | 2.0-6.0 V | Low Power or Battery Applications | CMOS | +/- 5.2 mA |
| 74HC147DB | SOT338-1
(SSOP16) | 10-to-4 Line Priority Encoder | 15@5V | 2.0-6.0 V | Low Power or Battery Applications | CMOS | +/- 5.2 mA |
| 74HC147N | SOT38-4
(DIP16) | 10-to-4 Line Priority Encoder | 15@5V | 2.0-6.0 V | Low Power or Battery Applications | CMOS | +/- 5.2 mA |
| 74HCT147D | SOT109-1
(SO16) | 10-to-4 Line Priority Encoder; TTL Enabled | 17 | 4.5-5.5V | Low Power | TTL | +/- 4 mA |
| 74HCT147N | SOT38-4
(DIP16) | Dual 2-to-4 Line Decoder/Demultiplexer; TTL Enabled | 13 | 4.5-5.5V | Low Power | TTL | +/- 4 mA |
Similar products
74HC/HCT147 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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