SN54ACT1284, SN74ACT1284 7-BIT BUS INTERFACES WITH 3-STATE OUTPUTS

SCAS459B - NOVEMBER 1994 - REVISED APRIL 1996

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features

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 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Designed for the IEEE 1284-I (Level 1 Type) and IEEE 1284-II (Level 2 Type) Electrical Specifications
Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), Thin Shrink Small-Outline (PW), and DIP (N) Packages, Ceramic Chip Carriers (FK), Flat (W), and DIP (J) Packages

description

The 'ACT1284 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 SN54ACT1284 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ACT1284 is characterized for operation from 0°C to 70°C.

Title: 7-BIT BUS INTERFACE WITH 3-STATE OUTPUTS
Product Family: BACKPLANE LOGIC (GTL, FB/FBPLUS, BTL, ETL)
Device Functionality: 7-BIT BUS INTERFACE
Orderable Devices: SN74ACT1284DBLE, SN74ACT1284DW, SN74ACT1284DWR

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View more information about generic part numbers:SN74ACT1284

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