18-bit universal bus transceiver (3-State)

The 74ALVCH16500 is a high-performance CMOS product. This device is an 18-bit universal transceiver featuring non-inverting 3-State bus compatible outputs in both send and receive directions. Data flow in each direction is controlled by output enable (OEAB and OE BA) latch enable (LEAB and LEBA)and clock (CP AB and CP BA) inputs. For A-to-B data flow, the device operates in the transparent mode when LEAB is High. When LEAB is Low, the A data is latched if CP AB is held at a High or Low logic level. If LEAB is Low, the A-bus data is stored in the latch/flip-flop on the High-to-Low transition of CP AB. When OEAB is High, the outputs are active. When OEAB is Low, the outputs are in the high-impedance state.

Data flow for B-to-A is similar to that of A-to-B but uses OE BA LEBA and CP BA. The output enables are complimentary (OEAB is active High, and OE BA is active Low).

To ensure the high impedance state during power up or power down, OE BA should be tied to VCC through a pullup resistor and OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

Features and benefits

  • Complies with JEDEC standard no. 8-1A
  • CMOS low power consumption
  • Direct interface with TTL levels
  • Current drive ± 24 mA at 3.0 V
  • All inputs have bushold circuitry
  • Output drive capability 50Ω transmission lines @ 85°C
  • MULTIBYTE™™ flow-through standard pin-out architecture
  • Low inductance multiple VCC and ground pins for minimum noise and ground bounce


Type numberProduct statusVCC(A) (V)VCC(B) (V)Logic switching levelsOutput drive capabilitytpd (ns)No of bitsfmax (MHz)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Package name
74ALVCH16500DGGProduction1.65 - 3.6n.a.TTL± 242.918150low-40~8593TSSOP56


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
Tube in DrypackActiveALVCH1650074ALVCH16500DGGS
( 9352 625 42512 )
Reel 13" Q1/T1 in DrypackActiveALVCH1650074ALVCH16500DGGY
( 9352 625 42518 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74ALVCH16500DGG74ALVCH16500DGGS74ALVCH16500DGGAlways Pb-free50.40.81.25E922
74ALVCH16500DGG74ALVCH16500DGGY74ALVCH16500DGGAlways Pb-free50.40.81.25E922
Quality and reliability disclaimer

Documentation (4)

File nameTitleTypeDate
74ALVCH1650018-bit universal bus transceiver; 3-stateData sheet2017-12-11
alvch16500alvch16500 IBIS modelIBIS model2013-04-07
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT364-1plastic, thin shrink small outline package; 56 leads; 0.5 mm pitch; 14 mm x 6.1 mm x 1.2 mm bodyPackage information2020-04-21


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File nameTitleTypeDate
alvch16500alvch16500 IBIS modelIBIS model2013-04-07

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