SN74BCT956OCTAL BUS TRANSCEIVER AND LATCHWITH 3-STATEOUTPUTS

SCBS088A - NOVEMBER 1991 - REVISED NOVEMBER 1993

features

State-of-the-Art BiCMOS Design Significantly Reduces I_CCZ
ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Latch Version of the ´BCT646
Independent Latches and Enables for A and B Buses
Multiplexed Real-Time and Stored Data
Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (NT)

description

The SN74BCT956 consists of bus transceiver circuits, D-typelatches, and control circuitry arranged for multiplexed transmissionof data directly from the input bus or from the internal latches.Data on the A or B bus is stored in the latches when the appropriatelatch-enable (LEAB or LEBA) input is low. Figure 1 illustrates thefour fundamental bus-management functions that can be performed withthe SN74BCT956.

Output-enable () anddirection-control (DIR) inputs are provided to control thetransceiver functions. In the transceiver mode ( low), data present at thehigh-impedance port may be stored in either latch or in both.

The select-control (SAB and SBA) inputs can multiplex stored andreal-time (transparent mode) data. When the appropriate latch-enableinput is high, the latch is transparent, and real-time data is outputregardless of the level at the select control.

The direction control (DIR) determines which bus receives datawhen is low. In theisolation mode ( high), A datamay be stored in one register and/or B data may be stored in theother register.

When an output function is disabled, the input function is stillenabled and may be used to store and transmit data. Only one of thetwo buses, A or B, may be driven at a time.

The SN74BCT956 is characterized for operation from 0°C to70°C.

Title: OCTAL BUS TRANSCEIVER AND LATCH WITH 3-STATE OUTPUTS
Product Family: LATCHED TRANSCEIVERS
Device Functionality: OCTAL BUS TRANSCEIVER AND LATCH
Orderable Devices: SN74BCT956DW, SN74BCT956DWR, SN74BCT956NT

View the complete PDF datasheet: scbs088a.pdf (100 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74BCT956

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