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74F257A

Selection guide

Datasheet

74F257A
(Product Specification)
31-Mar-95, 10 pages, 89 kB

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74F257A - Quad 2-line to 1-line selector/multiplexer, non-inverting (3-State)

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The 74F257A has four identical 2-input multiplexers with 3-State outputs which select 4 bits of data from two sources uncer control of a common Select (S) input. The I0a inputs are selected when the common Select input is Low and the I1n inputs are selected when the common Select input is High. Data appears at the outputs in true non-inverted form from the selected inputs. The 74F257A is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the common Slect input. Outputs are forced to a high impedance ?off? state when the Output Enable (OE) is High. All but one device must be in high impedance state to avoid currents that would exceed the maximum rating if the outputs were tied together. Design of the Output Enable signals must ensure that there is no overlap when outputs of 3-state devices were tied together.

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Features

  • Industrial range available (?40°C to +85°C)
  • Multifunction capability
  • Non-inverting data path
  • 3-State outputs
  • See 74F258A for inverting version


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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
I74F257ADI74F257AD,1129351 970 90112Volume productionSOT109TubeStandard Marking
I74F257ADI74F257AD,1189351 970 90118Volume productionSOT109Reel Pack, SMD, 13"Standard Marking
I74F257ANI74F257AN,1129351 971 00112Volume productionSOT38-4
(DIP16) 		TubeStandard Marking
N74F257ADN74F257AD,6029338 126 10602Volume productionSOT109Tube (Signetics)Standard Marking
N74F257ADN74F257AD,6239338 126 10623Volume productionSOT109Reel Pack, SMD, 13" (Signetics)Standard Marking
N74F257ANN74F257AN,6029338 126 00602Volume productionSOT38-4
(DIP16) 		Tube (Signetics)Standard Marking

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Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
I74F257ADI74F257AD,112I74F257AD
week 6, 2004 5,631,78E+081
I74F257ADI74F257AD,118I74F257AD
week 6, 2004 5,631,78E+081
I74F257ANI74F257AN,112I74F257AN
Always Pb-free 5,631,78E+08NA
N74F257ADN74F257AD,602N74F257AD
week 6, 2004 5,631,78E+081
N74F257ADN74F257AD,623N74F257AD
week 6, 2004 5,631,78E+081
N74F257ANN74F257AN,602N74F257AN
Always Pb-free 5,631,78E+08NA

Quality and reliability disclaimer

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Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
I74F257AD9351 970 90112  I74F257AD,112        not available
I74F257AD9351 970 90118  I74F257AD,118        not available
I74F257AN9351 971 00112  I74F257AN,112        not available
N74F257AD9338 126 10602  N74F257AD,602  0.3200      not available
N74F257AD9338 126 10623  N74F257AD,623  0.3200NAMOUSER ELECTRONICS2,500 11/20/2009Buy onlinenot available
    NADIGI-KEY CORPORATION4,839 11/20/2009Buy online 
    NAMOUSER ELECTRONICS2,500 11/20/2009Buy online 
N74F257AN9338 126 00602  N74F257AN,602  0.3700      Order samples
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Block diagrams/pinning

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Parametrics/similar products

Type numberPackageDescriptionPropagation Delay(ns)VoltageNo. of PinsLogic Switching LevelsOutput Drive Capability
I74F257ADSOT109
Quad 2-Input Multiplexer (3-State)4.54.5-5.5 V16TTL-3/+24 mA
I74F257ANSOT38-4
(DIP16)		Quad 2-Input Multiplexer (3-State)4.54.5-5.5 V16TTL-3/+24 mA
N74F257ADSOT109
Quad 2-Input Multiplexer (3-State)4.54.5-5.5 V16TTL-3/+24 mA
N74F257ANSOT38-4
(DIP16)		Quad 2-Input Multiplexer (3-State)4.54.5-5.5 V16TTL-3/+24 mA


Similar products
74F257A 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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