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74F138
Datasheet
(Product Specification)
14-Feb-91, 8 pages, 95 kB
General description
The 74F138 decoder accepts three binary weighted inputs (A0, A1, A2) and when enabled, provides eight mutually exclusive, active low outputs (Q0 ? Q7). The device features three enable inputs; two active low (E0, E1) and one active high (E2). Every output will be high unless E0 and E1 are low and E2 is high. This multiple enable function allows easy parallel expansion of the device to 1-of-32 (5 lines to 32 lines) decoder with just four 74F138s and one inverter . The device 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. Enable inputs not used must be permanently tied to their appropriate active high or active low state.
Features
- Demultiplexing capability
- Multiple input enable for easy expansion
- Ideal for memory chip select decoding
- Industrial temperature range available (?40°C to +85°C)
Products/packages
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| I74F138D | I74F138D,602 | 9350 330 90602 | Volume production | SOT109 | Tube (Signetics) | Standard Marking | |
| I74F138D | I74F138D,623 | 9350 330 90623 | Volume production | SOT109 | Reel Pack, SMD, 13" (Signetics) | Standard Marking | |
| I74F138N | I74F138N,602 | 9350 331 00602 | Volume production | SOT38-4
(DIP16) | Tube (Signetics) | Standard Marking | |
| N74F138D | N74F138D,602 | 9337 394 50602 | Volume production | SOT109 | Tube (Signetics) | Standard Marking | |
| N74F138D | N74F138D,623 | 9337 394 50623 | Volume production | SOT109 | Reel Pack, SMD, 13" (Signetics) | Standard Marking | |
| N74F138N | N74F138N,602 | 9336 729 00602 | Volume production | SOT38-4
(DIP16) | Tube (Signetics) | Standard Marking |
Quality/reliability/chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| I74F138D | I74F138D,602 | I74F138D |
| week 6, 2004 | 5,63 | 1,78E+08 | 1 | |
| I74F138D | I74F138D,623 | I74F138D |
| week 6, 2004 | 5,63 | 1,78E+08 | 1 | |
| I74F138N | I74F138N,602 | I74F138N |
| Always Pb-free | 5,63 | 1,78E+08 | NA | |
| N74F138D | N74F138D,602 | N74F138D |
| week 6, 2004 | 5,63 | 1,78E+08 | 1 | |
| N74F138D | N74F138D,623 | N74F138D |
| week 6, 2004 | 5,63 | 1,78E+08 | 1 | |
| N74F138N | N74F138N,602 | N74F138N |
| Always Pb-free | 5,63 | 1,78E+08 | NA |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| I74F138D | 9350 330 90602 | I74F138D,602 | not available | |||||||
| I74F138D | 9350 330 90623 | I74F138D,623 | not available | |||||||
| I74F138N | 9350 331 00602 | I74F138N,602 | not available | |||||||
| N74F138D | 9337 394 50602 | N74F138D,602 | 0.2800 | NA | ARROW ELECTRONICS | 1,742 | 11/19/2009 | Buy online | not available | |
| NA | FUTURE ELECTRONICS | 1,031 | 11/19/2009 | Buy online | ||||||
| NA | AVNET ELECTRONICS MARKETING | 2,108 | 11/19/2009 | Buy online | ||||||
| N74F138D | 9337 394 50623 | N74F138D,623 | 0.2800 | NA | MOUSER ELECTRONICS | 5,000 | 11/20/2009 | Buy online | Order samples | |
| NA | ARROW ELECTRONICS | 1,742 | 11/19/2009 | Buy online | ||||||
| NA | DIGI-KEY CORPORATION | 1,995 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 5,000 | 11/20/2009 | Buy online | ||||||
| ASIA | WPI | 2,500 | 2500 | 11/19/2009 | Buy online | |||||
| N74F138N | 9336 729 00602 | N74F138N,602 | 0.3200 | NA | ARROW ELECTRONICS | 1,000 | 11/19/2009 | Buy online | not available |
Design support
Application Notes
AN216;
Arbitration in shared resource systems (1988-07-18)AN203;
Test Fixtures for High Speed Logic (1998-04-02)AN202;
Testing and specifying FAST logic (1987-06-01)Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|
| I74F138D | SOT109
| 3-to-8 Line Decoder/Demultiplexer; Inverting | 6.1 | 4.5-5.5 V | 16 | TTL | -1/+20 mA |
| I74F138N | SOT38-4
(DIP16) | 3-to-8 Line Decoder/Demultiplexer; Inverting | 6.1 | 4.5-5.5 V | 16 | TTL | -1/+20 mA |
| N74F138D | SOT109
| 3-to-8 Line Decoder/Demultiplexer; Inverting | 6.1 | 4.5-5.5 V | 16 | TTL | -1/+20 mA |
| N74F138N | SOT38-4
(DIP16) | 3-to-8 Line Decoder/Demultiplexer; Inverting | 6.1 | 4.5-5.5 V | 16 | TTL | -1/+20 mA |
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74F138
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