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Datasheet

74HC/HCT161
(Product Specification)
01-Dec-90, 12 pages, 80 kB

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General description

The 74HC/HCT161 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74HC/HCT161 are synchronous presettable binary counters which feature an internal look-ahead carry 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 (CP).

The outputs (Q0 to Q3) of the counters may be preset to a HIGH or LOW level. A LOW level at the parallel enable input (PE) disables the counting action and causes the data at the data inputs (D0 to D3) to be loaded into the counter on the positive-going edge of the clock (providing that the set-up and hold time requirements for PE are met). Preset takes place regardless of the levels at count enable inputs (CEP and CET).

A LOW level at the master reset input (MR) sets all four outputs of the flip-flops (Q0 to Q3) to LOW level regardless of the levels at CP, PE, CET and CEP inputs (thus providing an asynchronous clear function).

The look-ahead carry simplifies serial cascading of the counters. Both count enable inputs (CEP and CET) must be HIGH to count. The CET input is fed forward to enable the terminal count output (TC). The TC output thus enabled will produce a HIGH output pulse of a duration approximately equal to a HIGH level output of Q0. This pulse can be used to enable the next cascaded stage.

The maximum clock frequency for the cascaded counters is determined by the CP to TC propagation delay and CEP to CP set-up time, according to the following formula:

fmax = (1) / (tP(max) (CP to TC) + tSU (CEP to CP) )

Features

  • Synchronous counting and loading
  • Two count enable inputs for n-bit cascading
  • Positive-edge triggered clock
  • Asynchronous reset
  • Output capability: standard
  • ICC category: MSI

Products/packages

Type numberNorth American Type numberOrdering code (12NC)Product statusPackagePackingMarkingChemical contentLeadfree conversion date
74HC161D74HC161D9337 145 20652Volume productionSOT109-1
(SO16)
Bulk Pack, CECCStandard Marking74HC161D
week 30, 2004
74HC161D74HC161D-T9337 145 20653Volume productionSOT109-1
(SO16)
Reel Pack, SMD, 13", CECCStandard Marking74HC161D
week 30, 2004
74HC161DB74HC161DB9351 745 10112Volume productionSOT338-1
(SSOP16)
TubeStandard Marking74HC161DB
week 12, 2005
74HC161DB74HC161DB-T9351 745 10118Volume productionSOT338-1
(SSOP16)
Reel Pack, SMD, 13"Standard Marking74HC161DB
week 12, 2005
74HC161N74HC161N9336 693 70652Volume productionSOT38-4
(DIP16)
Bulk Pack, CECCStandard Marking74HC161N
Always Pb-free
74HC161PW74HC161PW9351 883 20112Volume productionSOT403-1
(TSSOP16)
TubeStandard Marking74HC161PW
week 10, 2005
74HC161PW74HC161PW-T9351 883 20118Volume productionSOT403-1
(TSSOP16)
Reel Pack, SMD, 13"Standard Marking74HC161PW
week 10, 2005
74HCT161D74HCT161D9337 150 00652Volume productionSOT109-1
(SO16)
Bulk Pack, CECCStandard Marking74HCT161D
week 6, 2004
74HCT161D74HCT161D-T9337 150 00653Volume productionSOT109-1
(SO16)
Reel Pack, SMD, 13", CECCStandard Marking74HCT161D
week 6, 2004
74HCT161DB74HCT161DB9351 885 70112Volume productionSOT338-1
(SSOP16)
TubeStandard Marking74HCT161DB
week 12, 2005
74HCT161DB74HCT161DB-T9351 885 70118Volume productionSOT338-1
(SSOP16)
Reel Pack, SMD, 13"Standard Marking74HCT161DB
week 12, 2005
74HCT161N74HCT161N9336 700 00652Volume productionSOT38-4
(DIP16)
Bulk Pack, CECCStandard Marking74HCT161N
Always Pb-free
74HCT161PW74HCT161PW9351 883 10112Volume productionSOT403-1
(TSSOP16)
TubeStandard Marking74HCT161PW
week 10, 2005
74HCT161PW74HCT161PW-T9351 883 10118Volume productionSOT403-1
(TSSOP16)
Reel Pack, SMD, 13"Standard Marking74HCT161PW
week 10, 2005

Pricing/ordering/availability

Type numberOrdering code(12NC)Indicative price/unit($)RegionDistributorIn stockInventory dateBuy onlineSamples
74HC161D9337 145  20652  0.2800NAARROW ELECTRONICS2,6958/27/2008 Buy online not available
   NAAVNET ELECTRONICS MARKETING8,0138/27/2008 Buy online  
74HC161D9337 145  20653  0.2800NAARROW ELECTRONICS5,0008/27/2008 Buy online Order samples
   NAAVNET ELECTRONICS MARKETING2,5008/27/2008 Buy online  
   NAFUTURE ELECTRONICS20,7488/27/2008 Buy online  
74HC161DB9351 745  10112  0.2800NADIGI-KEY CORPORATION2,0698/28/2008 Buy online not available
74HC161DB9351 745  10118  0.2800      Order samples
74HC161N9336 693  70652  0.3400NAARROW ELECTRONICS1,9448/27/2008 Buy online Order samples
   NAAVNET ELECTRONICS MARKETING2,8858/27/2008 Buy online  
   EUFARNELL2758/27/2008 Buy online  
   NANEWARK2758/27/2008 Buy online  
74HC161PW9351 883  20112  0.2800      Order samples
74HC161PW9351 883  20118  0.2800NAAVNET ELECTRONICS MARKETING17,5008/27/2008 Buy online Order samples
74HCT161D9337 150  00652  0.2800EUFARNELL8468/27/2008 Buy online not available
   NANEWARK8468/27/2008 Buy online  
74HCT161D9337 150  00653  0.2800NAAVNET ELECTRONICS MARKETING2,5008/27/2008 Buy online Order samples
74HCT161DB9351 885  70112  0.2800NADIGI-KEY CORPORATION1,9048/28/2008 Buy online not available
74HCT161DB9351 885  70118  0.2800      Order samples
74HCT161N9336 700  00652  0.3400NAARROW ELECTRONICS1,4508/27/2008 Buy online Order samples
   NAAVNET ELECTRONICS MARKETING9888/27/2008 Buy online  
   EUFARNELL1388/27/2008 Buy online  
   NAFUTURE ELECTRONICS4458/27/2008 Buy online  
   NANEWARK1388/27/2008 Buy online  
74HCT161PW9351 883  10112  0.2800     not available
74HCT161PW9351 883  10118  0.2800      Order samples

Applications

  • Television sets
  • Home-sound sets
  • Multimedia systems
  • All mains fed audio systems
  • Car audio (boosters).

Block diagrams/pinning

Technical documents

Support Documents

Parametrics/similar products

Type numberPackageDescriptionFmax(MHz)Propagation Delay(ns)VoltagePower Dissipation ConsiderationsLogic Switching LevelsOutput Drive Capability
74HC161DSOT109-1
(SO16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset 48 19@5V 2.0-6.0 V Low Power or Battery Applications CMOS +/- 5.2 mA
74HC161DBSOT338-1
(SSOP16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset 48 19@5V 2.0-6.0 V Low Power or Battery Applications CMOS +/- 5.2 mA
74HC161NSOT38-4
(DIP16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset 48 18@5V 2.0-6.0 V Low Power or Battery Applications CMOS +/- 5.2 mA
74HC161PWSOT403-1
(TSSOP16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset 48 19@5V 2.0-6.0 V Low Power or Battery Applications CMOS +/- 5.2 mA
74HCT161DSOT109-1
(SO16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled 45 20 4.5-5.5V Low Power TTL +/- 4 mA
74HCT161DBSOT338-1
(SSOP16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled 45 20 4.5-5.5V Low Power TTL +/- 4 mA
74HCT161NSOT38-4
(DIP16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled 45 20 4.5-5.5V Low Power TTL +/- 4 mA
74HCT161PWSOT403-1
(TSSOP16)
Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled 45 20 4.5-5.5V Low Power TTL +/- 4 mA

Similar products

74HC/HCT161 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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