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Octal bus switch with quad output enables

The CBT3244A provides eight bits of high-speed TTL-compatible bus switching in a standard '244 device pinout. The low ON-state resistance of the switch allows connections to be made with minimal propagation delay. The CBT3244A device is organized as two 4-bit low-impedance switches with separate output-enable (OE) inputs. When OE is LOW, the switch is on and data can flow from port A to port B, or vice versa. When OE is HIGH, the switch is open and high-impedance state exists between the two ports. The CBT3244A is characterized for operation from -40 °C to +85 °C.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
CBT3244APW CBT3244APW,118 935275527118 SOT360-1 Order product
CBT3244APW CBT3244APW,134 935275527134 SOT360-1 Order product

Features and benefits

  • Standard '244-type pinout
  • 5 Ω switch connection between two ports
  • TTL compatible control input levels
  • Package options include:
    • plastic small outline (SO20)
    • shrink small outline (SSOP20)
    • shrink small outline, QSOP (SSOP20)
    • thin shrink small outline (TSSOP20)
    • depopulated heatsink very thin quad flat package, no leads (DHVQFN20)
  • Latch-up protection exceeds 500 mA per JESD78
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101



Type numberProduct statusVCC (V)VPASS (V)Logic switching levelsRON (Ω)f(-3dB) (MHz)No of bitstpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
CBT3244APWProduction4.5 - 5.53.9TTL7.030080.25very low-40~851014.645TSSOP20


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9352 755 27118 )
Reel 13" Q1/T1
( 9352 755 27134 )
ActiveCT3244AReel 13" Q1/T1 in LargePack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
Quality and reliability disclaimer

Documentation (3)

File nameTitleTypeDate
CBT3244AOctal bus switch with quad output enablesData sheet2017-09-08
AN90010Pin FMEA for CBT(D) familyApplication note2019-10-28
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08


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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
CBT3244APWCBT3244APW,118935275527118Reel 13" Q1/T1Order product
CBT3244APWCBT3244APW,134935275527134Reel 13" Q1/T1 in LargePackOrder product


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