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Datasheet

74F543
(Product Specification)
22-Jul-04, 12 pages, 117 kB

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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 numberNorth American Type numberOrdering code (12NC)Product statusPackagePackingMarkingChemical contentLeadfree conversion date
N74F543DN74F543D9338 769 20602Volume productionSOT137-1
(SO24)
Tube (Signetics)Standard MarkingN74F543D
week 13, 2005
N74F543DN74F543D-T9338 769 20623Volume productionSOT137-1
(SO24)
Reel Pack, SMD, 13" (Signetics)Standard MarkingN74F543D
week 13, 2005
N74F543DBN74F543DB9351 861 20112Volume productionSOT340-1
(SSOP24)
TubeStandard MarkingN74F543DB
week 12, 2005
N74F543DBN74F543DB-T9351 861 20118Volume productionSOT340-1
(SSOP24)
Reel Pack, SMD, 13"Standard MarkingN74F543DB
week 12, 2005

Pricing/ordering/availability

Type numberOrdering code(12NC)Indicative price/unit($)RegionDistributorIn stockInventory dateBuy onlineSamples
N74F543D9338 769  20602  0.8400     not available
N74F543D9338 769  20623  0.8400      Order samples
N74F543DB9351 861  20112  0.8400     not available
N74F543DB9351 861  20118  0.8400      Order samples

Block diagrams/pinning

Parametrics/similar products

Type numberPackageDescriptionPropagation Delay(ns)VoltageNo. of PinsLogic Switching LevelsOutput Drive CapabilityOutput Current(A)
N74F543DSOT137-1
(SO24)
Latched Transceiver; Non-Inverting (3-State)54.5-5.5 V24TTL-15/+64 mA (B side)-3/+24 mA (A side )
N74F543DBSOT340-1
(SSOP24)
Latched Transceiver; Non-Inverting (3-State)5.54.5-5.5 V24TTL-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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