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MFG:PHILIPS D/C:95+
Part Number: 74HCT1284
MFG: PHILIPS
D/C: 95+
Description: The 74HCT1284 parallel interface chip is designed to provide an asynchronous, 4-bit, bi-directional, parallel printe...
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74HCT1284
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DataSheet
General Description
74HCT1284 General 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) 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 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.
74HCT1284 Maximum Ratings
| 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 |
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 & GND
•IEEE 1284 Compliant Level 1 & 2
•Overvoltage Protection on B side
•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
74HCT1284 Connection Diagram
74HCT1284
PDF/DataSheet Download
- Datasheet: 74HCT1284
- File Size: 126873 KB
- Manufacturer: Philips
- Click here to Download
- ·74H00
- ETC [ETC]
- QUAD 2-INPUT NAND GATE
- 62068 KB
- ·74H00DC
- ETC [ETC]
- QUAD 2-INPUT NAND GATE
- 62068 KB
- ·74H00FC
- ETC [ETC]
- QUAD 2-INPUT NAND GATE
- 62068 KB
- ·74H00PC
- ETC [ETC]
- QUAD 2-INPUT NAND GATE
- 62068 KB
- ·74H11
- ETC [ETC]
- TRIPLE 3-INPUT AND GATE
- 57988 KB
- ·74H11DC
- ETC [ETC]
- TRIPLE 3-INPUT AND GATE
- 57988 KB
- ·74H11FC
- ETC [ETC]
- TRIPLE 3-INPUT AND GATE
- 57988 KB
- ·74H11PC
- ETC [ETC]
- TRIPLE 3-INPUT AND GATE
- 57988 KB
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