3.3 V parallel interface transceiver/buffer

The PDI1284P11 parallel interface chip is designed to provide an asynchronous, 8-bit, bidirectional, parallel interface for personal computers. The PDI1284P11 includes all 19 signal lines defined by the IEEE 1284 interface specification for Byte, Nibble, EPP, and ECP modes. The PDI1284P11 is designed for hosts or peripherals operating at 3.3 V to interface 3.3 V or 5.0 V devices.

The eight transceiver pairs (A/B 1 to 8) allow data transmission from the A-bus to the B-bus, or from the B-bus to the A-bus, depending on the state of the direction pin DIR.

The B-bus and the Y9 to Y13 lines have either totem pole or resistor pull-up outputs, depending on the state of the high drive enable pin HD. The A-bus has only totem pole style outputs. All inputs are TTL compatible with at least 400 mV of input hysteresis at VCC= 3.3 V.


  • Asynchronous operation
  • 8-bit transceivers
  • Six additional buffer/driver lines peripheral to cable
  • Five additional control lines from cable
  • 5 V tolerant
  • ESD protection:
    • HBM JESD22-A114E exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Latch-up current protection exceeds 500 mA per JEDEC Std 19
  • Input hysteresis
  • Low-noise operation
  • IEEE 1284 compliant level 1 and 2
  • Overvoltage protection on B/Y side for off-state
  • A side 3-state option
  • B side active or resistive pull-up option
  • Cable side supply voltage for 5 V or 3 V operation

Target applications

  • Printer interface


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)Power dissipation considerationsTamb (Cel)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
PDI1284P11DGGProduction3.0 - 3.6LVTTL- 14 / 14low0~70821.936TSSOP48


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
Bulk PackActivePDI1284P11DGGPDI1284P11DGG,112
( 9352 230 80112 )
Reel 13" Q1/T1ActivePDI1284P11DGGPDI1284P11DGG,118
( 9352 230 80118 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateMSLMSL leadfree
PDI1284P11DGGPDI1284P11DGG,112PDI1284P11DGGAlways Pb-free11
PDI1284P11DGGPDI1284P11DGG,118PDI1284P11DGGAlways Pb-free11
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
PDI1284P113.3 V parallel interface transceiver/bufferData sheet2017-07-20
AN240Interfacing 3 Volt and 5 Volt ApplicationsApplication note1995-09-14
AN263Power considerations when using CMOS and BiCMOS logic devicesApplication note2002-02-04
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT362-1_118TSSOP48; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-15
SOT362-1plastic, thin shrink small outline package; 48 leads; 0.5 mm pitch; 12.8 mm x 6.1 mm x 1.2 mm bodyOutline drawing2018-10-18


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