SN54ABT16501, SN74ABT16501 18-BIT UNIVERSAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SCBS086C - FEBRUARY 1991 - REVISED JANUARY 1997

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features

Members of the Texas Instruments Widebus^TM Family
State-of-the-Art EPIC-IIB^TM BiCMOS Design Significantly Reduces Power Dissipation
UBT^TM (Universal Bus Transceiver) Combines D-Type Latches and D-Type Flip-Flops for Operation in Transparent, Latched, or Clocked Mode
ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
Typical V_OLP (Output Ground Bounce) < 0.8 V at V_CC = 5 V, T_A = 25°C
Flow-Through Architecture Optimizes PCB Layout
Package Options Include Plastic 300-mil Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Spacings

Widebus, EPIC-IIB, and UBT are trademarks of TexasInstruments Incorporated.

description

These 18-bit universal bus transceivers consist of storageelements that can operate either as D-type latches or D-typeflip-flops to allow data flow in transparent or clocked modes.

Data flow in each direction is controlled by output-enable (OEABand ), latch-enable(LEAB and LEBA), and clock (CLKAB and CLKBA) inputs. For A-to-B dataflow, the device operates in the transparent mode when LEAB is high.When LEAB is low, the A data is latched if CLKAB is held at a high orlow logic level. If LEAB is low, the A data is stored in thelatch/flip-flop on the low-to-high transition of CLKAB. When OEAB ishigh, the outputs are active. When OEAB is low, the outputs are inthe high-impedance state.

Data flow for B to A is similar to that of A to B but uses, LEBA, and CLKBA. The outputenables are complementary (OEAB is active high and is active low).

To ensure the high-impedance state during power up or power down,OE should be tied to GND through a pulldown resistor and should be tied to V_CCthrough a pullup resistor; the minimum value of the resistor isdetermined by the current-sourcing/current-sinking capability of thedriver.

The SN54ABT16501 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. TheSN74ABT16501 is characterized for operation from -40°C to85°C.

Title: 18-BIT UNIVERSAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
Product Family: UNIVERSAL BUS TRANSCEIVERS (UBTS)
Device Functionality: 18-BIT BUS TRANSCEIVER
Orderable Devices: SN74ABT16501DGGR, SN74ABT16501DL, SN74ABT16501DLR

View the complete PDF datasheet: scbs086c.pdf (140 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74ABT16501

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