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74F543
Datasheet
General description
The 74F543 Octal Registered Transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate Latch Enable (LEAB, LEBA) and Output Enable (OEAB, OEBA) inputs are provided for each register to permit independent control of inputting and outputting in either direction of data flow. The A outputs are guaranteed to sink 24 mA, while the B outputs are rated for 64 mA.
FUNCTIONAL DESCRIPTION
The 74F543 contains two sets of eight D-type latches, with separate input and controls for each set. For data flow from A to B, for example, the A-to-B Enable (EAB) input must be LOW in order to enter data from A0 - A7 or take data from B0 - B7, as indicated in the Function Table. With EAB LOW, a LOW signal on the A-to-B Latch Enable (LEAB) input makes the A-to-B latches transparent; a subsequent LOW-to-HIGH transition for the LEAB signal puts the A latches in the storage mode and their outputs no longer change with the A inputs. With EAB and OEAB both LOW, the 3-State B output buffers are active and display the data present at the outputs of the A latches. Control of data flow from B to A is similar, but using the EBA, LEBA, and OEBA inputs.
Features
- Combines74F245 and 74F373 type functions in one chip
- 8-bit octal transceiver with D-type latch
- Back-to-back registers for storage
- Separate controls for data flow in each direction
- A outputs sink 20 mA and source 3 mA
- B outputs sink 64 mA and source 15 mA
- 3-State outputs for bus-oriented applications
- Available in SSOP Type II package
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| N74F543D | N74F543D | 9338 769 20602 | Volume production | SOT137-1
(SO24) | Tube (Signetics) | Standard Marking | N74F543D
| week 13, 2005 |
| N74F543D | N74F543D-T | 9338 769 20623 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" (Signetics) | Standard Marking | N74F543D
| week 13, 2005 |
| N74F543DB | N74F543DB | 9351 861 20112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | N74F543DB
| week 12, 2005 |
| N74F543DB | N74F543DB-T | 9351 861 20118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | N74F543DB
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| N74F543D | 9338 769 20602 | 0.8400 | not available | |||||
| N74F543D | 9338 769 20623 | 0.8400 | Order samples | |||||
| N74F543DB | 9351 861 20112 | 0.8400 | not available | |||||
| N74F543DB | 9351 861 20118 | 0.8400 | Order samples |
Technical documents
Application Notes
AN202_1;
Testing and specifying FAST logic (01-Jun-87)
AN203_2;
Test Fixtures for High Speed Logic (02-Apr-98)
AN216_2;
Arbitration in shared resource systems (18-Jul-88)
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Logic Switching Levels | Output Drive Capability | Output Current(A) |
|---|---|---|---|---|---|---|---|---|
| N74F543D | SOT137-1
(SO24) | Latched Transceiver; Non-Inverting (3-State) | 5 | 4.5-5.5 V | 24 | TTL | -15/+64 mA (B side) | -3/+24 mA (A side ) |
| N74F543DB | SOT340-1
(SSOP24) | Latched Transceiver; Non-Inverting (3-State) | 5.5 | 4.5-5.5 V | 24 | TTL | -15/+64 mA (B side) | -3/+24 mA ( A side) |
Similar products
74F543 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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