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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.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74ALVCH16500DGG 74ALVCH16500DGGS 935262542512 SOT364-1 Order product
74ALVCH16500DGG 74ALVCH16500DGGY 935262542518 SOT364-1 Order product

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 numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9352 625 42512 )
Tube in Drypack
( 9352 625 42518 )
ActiveALVCH16500Reel 13" Q1/T1 in Drypack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
Quality and reliability disclaimer

Documentation (3)

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


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File nameTitleTypeDate
alvch16500alvch16500 IBIS modelIBIS model2013-04-07

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74ALVCH16500DGG74ALVCH16500DGGS935262542512Tube in DrypackOrder product
74ALVCH16500DGG74ALVCH16500DGGY935262542518Reel 13" Q1/T1 in DrypackOrder product


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