74HC193DB NRND

Presettable synchronous 4-bit binary up, down counter

The 74HC193; 74HCT193 is a 4-bit synchronous binary up/down counter. Separate up/down clocks, CPU and CPD respectively, simplify operation. The outputs change state synchronously with the LOW-to-HIGH transition of either clock input. If the CPU clock is pulsed while CPD is held HIGH, the device will count up. If the CPD clock is pulsed while CPU is held HIGH, the device will count down. Only one clock input can be held HIGH at any time to guarantee predictable behavior. The device can be cleared at any time by the asynchronous master reset input (MR); it may also be loaded in parallel by activating the asynchronous parallel load input (PL). The terminal count up (TCU) and terminal count down (TCD) outputs are normally HIGH. When the circuit has reached the maximum count state of 15, the next HIGH-to-LOW transition of CPU will cause TCU to go LOW. TCU will stay LOW until CPU goes HIGH again, duplicating the count up clock. Likewise, the TCD output will go LOW when the circuit is in the zero state and the CPD goes LOW. The terminal count outputs can be used as the clock input signals to the next higher order circuit in a multistage counter, since they duplicate the clock waveforms. Multistage counters will not be fully synchronous, since there is a slight delay time difference added for each stage that is added. The counter may be preset by the asynchronous parallel load capability of the circuit. Information present on the parallel data inputs (D0 to D3) is loaded into the counter and appears on the outputs (Q0 to Q3) regardless of the conditions of the clock inputs when the parallel load (PL) input is LOW. A HIGH level on the master reset (MR) input will disable the parallel load gates, override both clock inputs and set all outputs (Q0 to Q3) LOW. If one of the clock inputs is LOW during and after a reset or load operation, the next LOW-to-HIGH transition of that clock will be interpreted as a legitimate signal and will be counted. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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
74HC193DB 74HC193DB,118 935188610118 SOT338-1 Order product
74HC193DB 74HC193DB,112 935188610112 SOT338-1 Order product

Features

  • Input levels:
    • For 74HC193: CMOS level
    • For 74HCT193: TTL level
  • Synchronous reversible 4-bit binary counting
  • Asynchronous parallel load
  • Asynchronous reset
  • Expandable without external logic
  • Complies with JEDEC standard no. 7A
  • 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

Parametrics

Type numberProduct statusVCC (V)Output drive capability (mA)Logic switching levelstpd (ns)Power dissipation considerationsTamb (Cel)Rth(j-a) (K/W)Ψth(j-top) (K/W)Package name
74HC193DB
NRND
Not for design in2.0 - 6.0+/- 5.2CMOS20low-40~12514842.0SSOP16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HC193DB
NRND
74HC193DB,118
( 9351 886 10118 )
ActiveHC193
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HC193DB,112
( 9351 886 10112 )
ActiveHC193Bulk Pack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HC193DB
NRND
74HC193DB,11874HC193DB11
74HC193DB
NRND
74HC193DB,11274HC193DB11
Quality and reliability disclaimer

Documentation (7)

File nameTitleTypeDate
74HC_HCT193Presettable synchronous 4-bit binary up/down counterData sheet2017-03-16
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hc19374HC193 IBIS modelIBIS model2019-01-31
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
hc19374HC193 IBIS modelIBIS model2019-01-31

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HC193DB74HC193DB,118935188610118Reel 13" Q1/T1Order product
74HC193DB74HC193DB,112935188610112Bulk PackOrder product

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