SN74ACT1284

Name: SN74ACT1284
Brand: TI
SKU: SN74ACT1284
Price: 0.451 USD

ACTIVE

7-Bit Bus Interfaces With 3-State Outputs

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Data sheet

document-pdfAcrobat SN54ACT1284, SN74ACT1284 datasheet (Rev. D)

SN74ACT1284

ACTIVE

Data sheet

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Product details

Technology family

ACT

Applications

IEEE1284

Rating

Catalog

Operating temperature range (°C)

0 to 70

Technology family

ACT

Applications

IEEE1284

Rating

Catalog

Operating temperature range (°C)

0 to 70

4.5-V to 5.5-V V_CC Operation
Inputs Accept Voltages to 5.5 V
Max t_pd of 20 ns at 5 V
3-State Outputs Directly Drive Bus Lines
Flow-Through Architecture Optimizes PCB Layout
Center-Pin V_CC and GND Configurations Minimize High-Speed Switching Noise
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
Designed for the IEEE 1284-I (Level-1 Type) and IEEE 1284-II (Level-2 Type) Electrical Specifications

4.5-V to 5.5-V V_CC Operation
Inputs Accept Voltages to 5.5 V
Max t_pd of 20 ns at 5 V
3-State Outputs Directly Drive Bus Lines
Flow-Through Architecture Optimizes PCB Layout
Center-Pin V_CC and GND Configurations Minimize High-Speed Switching Noise
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
Designed for the IEEE 1284-I (Level-1 Type) and IEEE 1284-II (Level-2 Type) Electrical Specifications

The ’ACT1284 devices are designed for asynchronous two-way communication between data buses. The control function minimizes external timing requirements.

The devices allow data transmission in either the A-to-B or the B-to-A direction for bits 1, 2, 3, and 4, depending on the logic level at the direction-control (DIR) input. Bits 5, 6, and 7, however, always transmit in the A-to-B direction.

The output drive for each mode is determined by the high-drive (HD) control pin. When HD is high, the high drive is delivered by the totem-pole configuration, and when HD is low, the outputs are open drain. This meets the drive requirements as specified in the IEEE 1284-I (level-1 type) and the IEEE 1284-II (level-2 type) parallel peripheral-interface specification.

The ’ACT1284 devices are designed for asynchronous two-way communication between data buses. The control function minimizes external timing requirements.

The devices allow data transmission in either the A-to-B or the B-to-A direction for bits 1, 2, 3, and 4, depending on the logic level at the direction-control (DIR) input. Bits 5, 6, and 7, however, always transmit in the A-to-B direction.

The output drive for each mode is determined by the high-drive (HD) control pin. When HD is high, the high drive is delivered by the totem-pole configuration, and when HD is low, the outputs are open drain. This meets the drive requirements as specified in the IEEE 1284-I (level-1 type) and the IEEE 1284-II (level-2 type) parallel peripheral-interface specification.

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