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74HCT1284

Features: •Asynchronous operation•4-Bit transceivers•3 additional buffer/driver lines•TTL compatible inputs•ESD protection exceeds 2000V per MIL STD 883 Method 3015 and 200V per Machine Model•Input Hysteresis•Low Noise Operation•Center Pin VCC & ...

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SeekIC No. : 004250816 Detail

74HCT1284: Features: •Asynchronous operation•4-Bit transceivers•3 additional buffer/driver lines•TTL compatible inputs•ESD protection exceeds 2000V per MIL STD 883 Method 3015 and...

74HCT1284 Data Sheet

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Part Number:
74HCT1284
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/30

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Product Details

Description



Features:

•Asynchronous operation
•4-Bit transceivers
•3 additional buffer/driver lines
•TTL compatible inputs
•ESD protection exceeds 2000V per MIL STD 883 Method 3015 and 200V per Machine Model
•Input Hysteresis
•Low Noise Operation
•Center Pin VCC & GND
•IEEE 1284 Compliant Level 1 & 2
•Overvoltage Protection on B side


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER CONDITIONS RATING UNIT
VCC DC supply voltage   0.5 to +6.5 V
IIK DC input diode current V1 < 0 ±20 mA
VI DC input voltage3   2 to +7.0 V
IOK DC output diode current VO < 0 ±50 mA
VOUT DC output voltage3 Output in Off or High state 0.5 to +5.5 V
IOUT DC output current Output in Low state ±50 mA
Tstg Storage temperature range   65 to 150 °C
ICC/IGND Continuous current through VCC or GND   ±200 mA



Description

The 74HCT1284 parallel interface chip is designed to provide an asynchronous, 4-bit, bi-directional, parallel printer interface for personal computers. Three additional lines are included to provide handshaking signals between the host and the peripheral. The part is designed to match IEEE 1284 standard.

The 4 transceiver pins (A/B 1-4) of the 74HCT1284 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 Y5-Y7 lines of the 74HCT1284 have totem pole or open drain style outputs depending on the state of the high drive enable pin HD. The A bus only has totem pole style outputs. All inputs are TTL compatible with at least 400mV of input hysteresis at VCC = 5.0V.




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