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Datasheet

74ABT821
(Product Specification)
12-Apr-05, 17 pages, 109 kB

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General description

The 74ABT821 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.

The 74ABT821 bus interface register is designed to eliminate the extra packages required to buffer existing registers and provide extra data width for wider data/address paths of buses carrying parity.

The 74ABT821 is a buffered 10-bit wide version of the 74ABT374A and 74ABT534A functions.

The 74ABT821 is a 10-bit, edge triggered register coupled to ten 3-state output buffers. The two sections of the device are controlled independently by the clock (CP) and output enable (OE) control gates.

The register is fully edge triggered. The state of each D input, one set-up time before the LOW-to-HIGH clock transition is transferred to the corresponding output Q of the flip-flop.

The 3-state output buffers are designed to drive heavily loaded 3-state buses, MOS memories, or MOS microprocessors.

The active LOW output enable (OE) controls all ten 3-state buffers independent of the register operation. When OE is LOW, the data in the register appears at the outputs. When OE is HIGH, the outputs are in high-impedance OFF-state, which means they will neither drive nor load the bus.

Features

  • High-speed parallel registers with positive-edge triggered D-type flip-flops
  • Ideal where high speed, light loading, or increased fan-in are required with MOS microprocessors
  • Output capability: +64 mA and -32 mA
  • Power-on 3-state
  • Power-on reset
  • Latch-up protection:
    • JESD78: exceeds 500 mA
  • ESD protection:
    • MIL STD 883 method 3015: exceeds 2000 V
    • Machine model: exceeds 200 V

Products/packages

Type numberNorth American Type numberOrdering code (12NC)Product statusPackagePackingMarkingChemical contentLeadfree conversion date
74ABT821D74ABT821D9350 544 80602Volume productionSOT137-1
(SO24)
Tube (Signetics)Standard Marking74ABT821D
week 13, 2005
74ABT821D74ABT821D-T9350 544 80623Volume productionSOT137-1
(SO24)
Reel Pack, SMD, 13" (Signetics)Standard Marking74ABT821D
week 13, 2005
74ABT821DB74ABT821DB9350 691 90112Volume productionSOT340-1
(SSOP24)
TubeStandard Marking74ABT821DB
week 12, 2005
74ABT821DB74ABT821DB-T9350 691 90118Volume productionSOT340-1
(SSOP24)
Reel Pack, SMD, 13"Standard Marking74ABT821DB
week 12, 2005
74ABT821PW74ABT821PW9351 789 10112Volume productionSOT355-1
(TSSOP24)
TubeStandard Marking74ABT821PW
week 10, 2005
74ABT821PW74ABT821PW-T9351 789 10118Volume productionSOT355-1
(TSSOP24)
Reel Pack, SMD, 13"Standard Marking74ABT821PW
week 10, 2005

Pricing/ordering/availability

Type numberOrdering code(12NC)Indicative price/unit($)RegionDistributorIn stockInventory dateBuy onlineSamples
74ABT821D9350 544  80602  1.1000NAAVNET ELECTRONICS MARKETING9609/5/2008 Buy online not available
74ABT821D9350 544  80623  1.1000ASIAWPI8,00009/06/2008 Buy online Order samples
74ABT821DB9350 691  90112  1.1000NAARROW ELECTRONICS279/5/2008 Buy online not available
   NAAVNET ELECTRONICS MARKETING1,2199/5/2008 Buy online  
74ABT821DB9350 691  90118  1.1000      Order samples
74ABT821PW9351 789  10112  2.3300NADIGI-KEY CORPORATION1,5289/6/2008 Buy online not available
74ABT821PW9351 789  10118  2.3300      Order samples

Block diagrams/pinning

Parametrics/similar products

Type numberPackageDescriptionFmax(MHz)Propagation Delay(ns)VoltageLogic Switching LevelsOutput Drive Capability
74ABT821DSOT137-1
(SO24)
10-Bit D-Type Flip-Flop; Positive-Edge Trigger (3-State) 185 4.6 4.5-5.5 V TTL -32/+64 mA
74ABT821DBSOT340-1
(SSOP24)
10-Bit D-Type Flip-Flop; Positive-Edge Trigger (3-State) 185 4.6 4.5-5.5 V TTL -32/+64 mA
74ABT821PWSOT355-1
(TSSOP24)
10-Bit D-Type Flip-Flop; Positive-Edge Trigger (3-State) 185 4.6 4.5-5.5 V TTL -32/+64 mA

Similar products

74ABT821 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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