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74F161A_163A

Selection guide

Datasheet

(Product Specification)
v.3, 30-Jun-00, 14 pages, 122 kB

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4-bit binary counter

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

4-bit binary counters feature an internal carry look-ahead and can be used for high-speed counting. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock. The clock input is buffered. The outputs of the counters may be preset to High or Low level. A Low level at the Parallel Enable (PE) input disables the counting action and causes the data at the D0-D3 inputs to be loaded into the counter on the positive-going edge of the clock (provided that the setup and hold requirements for PE are met). Preset takes place regardless of the levels at Count Enable (CEP, CET) inputs.

A Low level at the Master Reset (MR) input sets all the four outputs of the flip-flops (Q0-Q3) in 74F161A to Low levels, regardless of the levels at CP, PE, CET and CEP inputs (thus providing an asynchronous clear function). For the 74F163A, the clear function is synchronous. A Low level at the Synchronous Reset (SR) input sets all four outputs of the flip-flops (Q0-Q3) to Low levels after the next positive-going transition on the clock (CP) input (provided that the setup and hold time requirements for SR are met). This action occurs regardless of the levels at PE, CET, and CEP inputs. The synchronous reset feature enables the designer to modify the maximum count with only one external NAND gate . The carry look-ahead simplifies serial cascading of the counters. Both Count Enable (CEP and CET) inputs must be High to count. The CET input is fed forward to enable the TC output. The TC output thus enabled will produce a High output pulse of a duration approximately equal to the High level output of Q0. This pulse can be used to enable the next cascaded stage . The TC output is subjected to decoding spikes due to internal race conditions. Therefore, it is not recommended for use as clock or asynchronous reset for flip-flops, registers, or counters.

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Features

  • Synchronous counting and loading
  • Two count enable inputs for n-bit cascading
  • Positive edge-triggered clock
  • Asynchronous Master Reset (74F161A)
  • Synchronous Reset (74F163A)
  • High speed synchronous expansion
  • Typical count rate of 130MHz
  • Industrial range (-40 Cel to +85 Cel) available


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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
I74F161ADI74F161AD,1129352 077 50112Volume productionSOT109-1
(SO16) 		TubeStandard Marking
I74F161ADI74F161AD,1189352 077 50118Volume productionSOT109-1
(SO16) 		Reel Pack, SMD, 13"Standard Marking
I74F161ANI74F161AN,1129352 077 60112Volume productionSOT38-4
(DIP16) 		TubeStandard Marking
N74F161ADN74F161AD,6029338 121 90602Volume productionSOT109-1
(SO16) 		Tube (Signetics)Standard Marking
N74F161ADN74F161AD,6239338 121 90623Volume productionSOT109-1
(SO16) 		Reel Pack, SMD, 13" (Signetics)Standard Marking
N74F161ANN74F161AN,6029337 947 10602Volume 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 Lead-free
I74F161ADI74F161AD,112I74F161AD
week 6, 2004 5,631,78E+081
I74F161ADI74F161AD,118I74F161AD
week 6, 2004 5,631,78E+081
I74F161ANI74F161AN,112I74F161AN
Always Pb-free 5,631,78E+08NA
N74F161ADN74F161AD,602N74F161AD
week 6, 2004 5,631,78E+081
N74F161ADN74F161AD,623N74F161AD
week 6, 2004 5,631,78E+081
N74F161ANN74F161AN,602N74F161AN
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
I74F161AD9352 077 50112  I74F161AD,112  JAPANCHIP ONE STOPno 03/19/2010Buy onlinenot available
I74F161AD9352 077 50118  I74F161AD,118  JAPANCHIP ONE STOPno 03/19/2010Buy onlinenot available
I74F161AN9352 077 60112  I74F161AN,112  JAPANCHIP ONE STOPno 03/19/2010Buy onlinenot available
N74F161AD9338 121 90602  N74F161AD,602  0.2900JAPANCHIP ONE STOPno 03/19/2010Buy onlinenot available
N74F161AD9338 121 90623  N74F161AD,623  0.2900JAPANCHIP ONE STOPno 03/19/2010Buy onlineOrder samples
N74F161AN9337 947 10602  N74F161AN,602  0.3400NAARROW ELECTRONICS602 3/18/2010Buy onlinenot available
    JAPANCHIP ONE STOPno 03/19/2010Buy online 
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Block diagrams/pinning

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Parametrics/similar products

Type numberPackageDescriptionFmax(MHz)Propagation Delay(ns)VoltageNo. of PinsLogic Switching LevelsOutput Drive Capability
I74F161ADSOT109-1
(SO16)		Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset1306.54.5-5.5 V16TTL-1/+20 mA
I74F161ANSOT38-4
(DIP16)		Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset1306.54.5-5.5 V16TTL-1/+20 mA
N74F161ADSOT109-1
(SO16)		Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset1306.54.5-5.5 V16TTL-1/+20 mA
N74F161ANSOT38-4
(DIP16)		Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset1306.54.5-5.5 V16TTL-1/+20 mA


Similar products
74F161A_163A 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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