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74HC/HCT161
Datasheet
(Product Specification)
01-Dec-90, 12 pages, 80 kB
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 number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| 74HC161D | 74HC161D,652 | 9337 145 20652 | Volume production | SOT109 | Bulk Pack, CECC | Standard Marking | |
| 74HC161D | 74HC161D,653 | 9337 145 20653 | Volume production | SOT109 | Reel Pack, SMD, 13", CECC | Standard Marking | |
| 74HC161DB | 74HC161DB,112 | 9351 745 10112 | Volume production | SOT338-1
(SSOP16) | Tube | Standard Marking | |
| 74HC161DB | 74HC161DB,118 | 9351 745 10118 | Volume production | SOT338-1
(SSOP16) | Reel Pack, SMD, 13" | Standard Marking | |
| 74HC161N | 74HC161N,652 | 9336 693 70652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | |
| 74HC161PW | 74HC161PW,112 | 9351 883 20112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| 74HC161PW | 74HC161PW,118 | 9351 883 20118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking | |
| 74HCT161D | 74HCT161D,652 | 9337 150 00652 | Volume production | SOT109 | Bulk Pack, CECC | Standard Marking | |
| 74HCT161D | 74HCT161D,653 | 9337 150 00653 | Volume production | SOT109 | Reel Pack, SMD, 13", CECC | Standard Marking | |
| 74HCT161DB | 74HCT161DB,112 | 9351 885 70112 | Volume production | SOT338-1
(SSOP16) | Tube | Standard Marking | |
| 74HCT161DB | 74HCT161DB,118 | 9351 885 70118 | Volume production | SOT338-1
(SSOP16) | Reel Pack, SMD, 13" | Standard Marking | |
| 74HCT161N | 74HCT161N,652 | 9336 700 00652 | Volume production | SOT38-4
(DIP16) | Bulk Pack, CECC | Standard Marking | |
| 74HCT161PW | 74HCT161PW,112 | 9351 883 10112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| 74HCT161PW | 74HCT161PW,118 | 9351 883 10118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking |
Quality/reliability/chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| 74HC161D | 74HC161D,652 | 74HC161D |
| week 30, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74HC161D | 74HC161D,653 | 74HC161D |
| week 30, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74HC161DB | 74HC161DB,112 | 74HC161DB |
| week 12, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74HC161DB | 74HC161DB,118 | 74HC161DB |
| week 12, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74HC161N | 74HC161N,652 | 74HC161N |
| Always Pb-free | 6,62 | 1,51E+08 | NA | |
| 74HC161PW | 74HC161PW,112 | 74HC161PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74HC161PW | 74HC161PW,118 | 74HC161PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74HCT161D | 74HCT161D,652 | 74HCT161D |
| week 6, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74HCT161D | 74HCT161D,653 | 74HCT161D |
| week 6, 2004 | 6,62 | 1,51E+08 | 1 | |
| 74HCT161DB | 74HCT161DB,112 | 74HCT161DB |
| week 12, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74HCT161DB | 74HCT161DB,118 | 74HCT161DB |
| week 12, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74HCT161N | 74HCT161N,652 | 74HCT161N |
| Always Pb-free | 6,62 | 1,51E+08 | NA | |
| 74HCT161PW | 74HCT161PW,112 | 74HCT161PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 | |
| 74HCT161PW | 74HCT161PW,118 | 74HCT161PW |
| week 10, 2005 | 6,62 | 1,51E+08 | 1 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC161D | 9337 145 20652 | 74HC161D,652 | 0.2800 | NA | ARROW ELECTRONICS | 1,145 | 11/19/2009 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 1,993 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 1,762 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 4,050 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 1,762 | 11/20/2009 | Buy online | ||||||
| 74HC161D | 9337 145 20653 | 74HC161D,653 | 0.2800 | NA | ARROW ELECTRONICS | 1,145 | 11/19/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 4,562 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 347 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 42,780 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 347 | 11/20/2009 | Buy online | ||||||
| 74HC161DB | 9351 745 10112 | 74HC161DB,112 | 0.2800 | NA | DIGI-KEY CORPORATION | 1,872 | 11/20/2009 | Buy online | not available | |
| 74HC161DB | 9351 745 10118 | 74HC161DB,118 | 0.2800 | not available | ||||||
| 74HC161N | 9336 693 70652 | 74HC161N,652 | 0.3400 | NA | NEWARK | 423 | 11/20/2009 | Buy online | Order samples | |
| NA | ARROW ELECTRONICS | 883 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 1,808 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 1,000 | 11/19/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 1,808 | 11/20/2009 | Buy online | ||||||
| 74HC161PW | 9351 883 20112 | 74HC161PW,112 | 0.2800 | not available | ||||||
| 74HC161PW | 9351 883 20118 | 74HC161PW,118 | 0.2800 | NA | MOUSER ELECTRONICS | 75 | 11/20/2009 | Buy online | not available | |
| NA | MOUSER ELECTRONICS | 75 | 11/20/2009 | Buy online | ||||||
| 74HCT161D | 9337 150 00652 | 74HCT161D,652 | 0.2800 | NA | NEWARK | 2,573 | 11/20/2009 | Buy online | not available | |
| 74HCT161D | 9337 150 00653 | 74HCT161D,653 | 0.2800 | NA | NEWARK | 2,573 | 11/20/2009 | Buy online | not available | |
| ASIA | WPI | 2,500 | 2500 | 11/19/2009 | Buy online | |||||
| 74HCT161DB | 9351 885 70112 | 74HCT161DB,112 | 0.2800 | NA | DIGI-KEY CORPORATION | 1,752 | 11/20/2009 | Buy online | not available | |
| 74HCT161DB | 9351 885 70118 | 74HCT161DB,118 | 0.2800 | not available | ||||||
| 74HCT161N | 9336 700 00652 | 74HCT161N,652 | 0.3400 | NA | NEWARK | 677 | 11/20/2009 | Buy online | not available | |
| NA | ARROW ELECTRONICS | 775 | 11/19/2009 | Buy online | ||||||
| NA | AVNET ELECTRONICS MARKETING | 580 | 11/19/2009 | Buy online | ||||||
| 74HCT161PW | 9351 883 10112 | 74HCT161PW,112 | 0.2800 | not available | ||||||
| 74HCT161PW | 9351 883 10118 | 74HCT161PW,118 | 0.2800 | not available |
Applications
- Television sets
- Home-sound sets
- Multimedia systems
- All mains fed audio systems
- Car audio (boosters).
Parametrics/similar products
| Type number | Package | Description | Fmax(MHz) | Propagation Delay(ns) | Voltage | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74HC161D | SOT109
| 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 |
| 74HC161DB | SOT338-1
(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 |
| 74HC161N | SOT38-4
(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 |
| 74HC161PW | SOT403-1
(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 |
| 74HCT161D | SOT109
| Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled | 45 | 20 | 4.5-5.5V | Low Power | TTL | +/- 4 mA |
| 74HCT161DB | SOT338-1
(SSOP16) | Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled | 45 | 20 | 4.5-5.5V | Low Power | TTL | +/- 4 mA |
| 74HCT161N | SOT38-4
(DIP16) | Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled | 45 | 20 | 4.5-5.5V | Low Power | TTL | +/- 4 mA |
| 74HCT161PW | SOT403-1
(TSSOP16) | Presettable Synchronous 4-Bit Binary Counter; Asynchronous Reset; TTL Enabled | 45 | 20 | 4.5-5.5V | Low Power | TTL | +/- 4 mA |
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74HC/HCT161
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