Texas Instruments SN74BCT29827BDW

Overview

SN74BCT29827BDW from Texas Instruments is a 10-bit non-inverting buffer/driver with dual 3-state enable inputs (OE1, OE2), BiCMOS technology, 5 V supply operation, and SOIC-24 package. It provides high-speed bus interface for wide data paths or parity buses in memory address buffering and system bus driving applications.

For engineers reviewing the SN74BCT29827BDW datasheet, SN74BCT29827BDW pinout, SN74BCT29827BDW application, or SN74BCT29827BDW equivalent, key selection criteria include 3-state output timing (tPLH/tPHL ≤ 5.5 ns), low ICCZ standby current (≤ 6 mA), high drive strength (IOL = 96 mA), and compatibility with TTL-level inputs and CMOS outputs.

Technical Context

This device implements a flow-through pin architecture with P-N-P input stage to reduce DC loading and BiCMOS output stage for high-current sinking capability. The dual active-low 3-state enables (OE1/OE2) feed a 2-input AND gate - either high disables all ten Y outputs into high-impedance state.

It operates over 0°C to 70°C with VCC = 4.5–5.5 V, supports 50 pF load switching, and maintains high-impedance during power-up/down. Input clamp protection exceeds 2000 V (MIL-STD-883C), and ESD robustness meets 200 V machine model.

Key Specifications

Pinout & Package

SN74BCT29827BDW uses a 24-pin SOIC (DW) package with 300-mil width, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit 3-state buffer applications.

Compared with SN74ACT244N and SN74LS244N, the SN74BCT29827BDW uniquely delivers 10-bit width, 96 mA drive, and BiCMOS efficiency - making it optimal for high-fanout, timing-critical bus interfaces where channel count and sink strength are non-negotiable.

Availability

SN74BCT29827BDW is available at Aetrix Electronics and suitable for memory address buffering, system bus driving, and parity bus interface applications requiring stable component supply and long-term industrial availability.

Supply support for SN74BCT29827BDW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN74BCT29827BDW belongs to TI's BCT (Bipolar-CMOS Transistor) logic family, engineered for high-speed, high-drive bus interface applications where TTL compatibility and CMOS efficiency must coexist.

FAQ

What is the operating temperature range for SN74BCT29827BDW?

The SN74BCT29827BDW is characterized for operation from 0°C to 70°C, matching commercial-grade requirements. This range is specified in the recommended operating conditions table of the SCBS008C datasheet and validated across production lots. Unlike the military-grade SN54BCT29827B (−55°C to 125°C), the SN74BCT29827BDW targets industrial and computing applications where ambient thermal management is controlled. Its SOIC-24 package supports this range with MSL-1 reflow profile compliance.

Does SN74BCT29827BDW support true bidirectional data flow?

No, SN74BCT29827BDW is a unidirectional non-inverting buffer - signals flow only from A1–A10 inputs to Y1–Y10 outputs. It lacks internal direction control or bus transceiver logic. While its 3-state outputs allow shared bus use, external control logic must manage data direction; the device itself does not auto-sense or reverse signal path. This distinguishes it from transceivers like the SN74BCT245, which integrate direction pins and dual 3-state control.

What is the maximum capacitive load SN74BCT29827BDW can drive reliably?

SN74BCT29827BDW is characterized for CL = 50 pF in its switching characteristics table, with guaranteed tPLH/tPHL performance up to that load. While it can drive heavier loads (e.g., >100 pF) due to its 96 mA sink capability, timing margins degrade beyond 50 pF - propagation delay increases and edge rate slows. For designs exceeding 50 pF, simulation or empirical validation is required. The 50 pF spec reflects the test condition used to guarantee published timing across temperature and voltage.

How does the dual OE architecture of SN74BCT29827BDW improve system reliability?

The SN74BCT29827BDW uses two active-low enables (OE1, OE2) feeding an internal AND gate - if either is high, all ten outputs go Hi-Z. This allows independent control of buffer groups or redundancy in fault detection: one OE can be tied to system reset, the other to local bus arbitration. During power sequencing, both OEs default high, ensuring Hi-Z state before VCC stabilizes - preventing bus contention. This architecture is explicitly verified in the function table and power-down behavior section of the SCBS008C datasheet.

Is SN74BCT29827BDW pin-compatible with other 24-pin SOIC logic buffers?

No, SN74BCT29827BDW has a unique 10-bit flow-through pinout (A1–A10 on left, Y1–Y10 on right, dual OE and power on ends) not shared by octal or hex buffers. For example, SN74BCT244N (octal) uses different pin assignments for enables and I/O. Pin compatibility is confirmed only within the BCT29827B family (e.g., SN54BCT29827B in FK/W packages). The DW package pin map is fixed per TI's SCBS008C document and verified in the top-view diagrams provided.