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74F157A; 74F158A

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General description

The 74F157A is a high speed Quad 2-Input Multiplexer which selects 4 bits of data from one of two sources under the control of a common Select input (S). The Enable input (E) is active when Low. When E is High, all of the outputs (Yn) are forced Low regardless of all other input conditions.

Moving data from two registers to a common output bus is a common use of the 74F157A. The state of the Select input determines the particular register from which the data comes.

The device 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 Select input.

The 74F158A is similar, but has inverting outputs (Yn).

Products/packages

Type numberNorth American Type numberOrdering code (12NC)Product statusPackagePackingMarkingChemical contentLeadfree conversion date
I74F157ADI74F157AD9352 077 20112Volume productionSOT109-1
(SO16)
TubeStandard MarkingI74F157AD
week 6, 2004
I74F157ADI74F157AD-T9352 077 20118Volume productionSOT109-1
(SO16)
Reel Pack, SMD, 13"Standard MarkingI74F157AD
week 6, 2004
I74F157ANI74F157AN9352 077 30112Volume productionSOT38-4
(DIP16)
TubeStandard MarkingI74F157AN
Always Pb-free
N74F157ADN74F157AD9338 125 70602Volume productionSOT109-1
(SO16)
Tube (Signetics)Standard MarkingN74F157AD
week 6, 2004
N74F157ADN74F157AD-T9338 125 70623Volume productionSOT109-1
(SO16)
Reel Pack, SMD, 13" (Signetics)Standard MarkingN74F157AD
week 6, 2004
N74F157ANN74F157AN9338 125 60602Volume productionSOT38-4
(DIP16)
Tube (Signetics)Standard MarkingN74F157AN
Always Pb-free
N74F158ADN74F158AD9338 125 90602Volume productionSOT109-1
(SO16)
Tube (Signetics)Standard MarkingN74F158AD
week 6, 2004
N74F158ADN74F158AD-T9338 125 90623Volume productionSOT109-1
(SO16)
Reel Pack, SMD, 13" (Signetics)Standard MarkingN74F158AD
week 6, 2004
N74F158ANN74F158AN9338 125 80602Volume productionSOT38-4
(DIP16)
Tube (Signetics)Standard MarkingN74F158AN
Always Pb-free

Pricing/ordering/availability

Type numberOrdering code(12NC)Indicative price/unit($)RegionDistributorIn stockInventory dateBuy onlineSamples
I74F157AD9352 077  20112        Order samples
I74F157AD9352 077  20118        Order samples
I74F157AN9352 077  30112        Order samples
N74F157AD9338 125  70602  0.2300NAARROW ELECTRONICS2,4857/4/2008 Buy online Order samples
   NADIGI-KEY CORPORATION2936/29/2008 Buy online  
   NAFUTURE ELECTRONICS2107/4/2008 Buy online  
N74F157AD9338 125  70623  0.2300      Order samples
N74F157AN9338 125  60602  0.3400      Order samples
N74F158AD9338 125  90602  0.2700     not available
N74F158AD9338 125  90623  0.2700      Order samples
N74F158AN9338 125  80602  0.3400      Order samples

Block diagrams/pinning

Technical documents

Application Notes

AN2021_1; Thermal considerations for FAST logic products (13-Mar-95)
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 numberPackageDescriptionPropagation Delay(ns)VoltageNo. of PinsLogic Switching LevelsOutput Drive Capability
I74F157ADSOT109-1
(SO16)
Quad 2-Input Multiplexer; Non-Inverting 4.6 4.5-5.5 V 16 TTL -1/+20 mA
I74F157ANSOT38-4
(DIP16)
Quad 2-Input Multiplexer; Non-Inverting 4.6 4.5-5.5 V 16 TTL -1/+20 mA
N74F157ADSOT109-1
(SO16)
Quad 2-Input Multiplexer; Non-Inverting 4.6 4.5-5.5 V 16 TTL -1/+20 mA
N74F157ANSOT38-4
(DIP16)
Quad 2-Input Multiplexer; Non-Inverting 4.6 4.5-5.5 V 16 TTL -1/+20 mA
N74F158ADSOT109-1
(SO16)
Quad 2-Input Multiplexer; Inverting 3.7 4.5-5.5 V 16 TTL -1/+20 mA
N74F158ANSOT38-4
(DIP16)
Quad 2-Input Multiplexer; Inverting 3.7 4.5-5.5 V 16 TTL -1/+20 mA

Similar products

74F157A; 74F158A 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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