74HC163DB NRND

Presettable synchronous 4-bit binary counter; synchronous reset

The 74HC163; 74HCT163 is a synchronous presettable binary counter with an internal look-head carry. 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. A LOW at the parallel enable input (PE) disables the counting action. It causes the data at the data inputs (D0 to D3) to be loaded into the counter on the positive-going edge of the clock. Preset takes place regardless of the levels at count enable inputs (CEP and CET). A LOW at the master reset input (MR) sets Q0 to Q3 LOW after the next positive-going transition on the clock input (CP). This action occurs regardless of the levels at input pins PE, CET and CEP. This synchronous reset feature enables the designer to modify the maximum count with only one external NAND gate. The look-ahead carry simplifies serial cascading of the counters. Both 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 output of Q0. This pulse can be used to enable the next cascaded stage. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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

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

Not recommended for new designs (NRND), click here for the alternative product.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HC163DB 74HC163DB,118 935187330118 SOT338-1 Order product
74HC163DB 74HC163DB,112 935187330112 SOT338-1 Order product

Features

  • Complies with JEDEC standard no. 7A
  • Input levels:
    • For 74HC163: CMOS level
    • For 74HCT163: TTL level
  • Synchronous counting and loading
  • 2 count enable inputs for n-bit cascading
  • Synchronous reset
  • Positive-edge triggered clock
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Multiple package options
  • Specified from ‑40 °C to +85 °C and ‑40 °C to +125 °C

Target applications

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

Parametrics

Type numberProduct statusVCC (V)Output drive capability (mA)Logic switching levelstpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Package name
74HC163DB
NRND
Not for design in2.0 - 6.0+/- 5.2CMOS17low-40~12514842.0SSOP16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HC163DB
NRND
74HC163DB,118
( 9351 873 30118 )
ActiveHC163
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HC163DB,112
( 9351 873 30112 )
ActiveHC163Bulk Pack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HC163DB
NRND
74HC163DB,11874HC163DB11
74HC163DB
NRND
74HC163DB,11274HC163DB11
Quality and reliability disclaimer

Documentation (7)

File nameTitleTypeDate
74HC_HCT163Presettable synchronous 4-bit binary counter; synchronous resetData sheet2018-10-12
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hchc Spice modelSPICE model2013-05-06
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SOT338-1plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm bodyOutline drawing2018-10-18

Support

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Models

File nameTitleTypeDate
hchc Spice modelSPICE model2013-05-06

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HC163DB74HC163DB,118935187330118Reel 13" Q1/T1Order product
74HC163DB74HC163DB,112935187330112Bulk PackOrder product

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