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Texas Instruments SN74BCT29827BNT
- Part No.:
- SN74BCT29827BNT
- Manufacturer:
- Texas Instruments
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74BCT29827BNT.pdf
- Description:
- IC BUF NON-INVERT 5.5V 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,867
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Product details
Overview
SN74BCT29827BNT from Texas Instruments is a 10-bit non-inverting buffer/driver with dual active-low 3-state enable inputs (OE1, OE2), BiCMOS output stage, 96 mA sink current capability per output, and SOIC-24 (NT) package. It interfaces wide data buses or memory address registers in industrial control backplanes requiring high-drive, low-ICCZ bus isolation.
For engineers reviewing the SN74BCT29827BNT datasheet, SN74BCT29827BNT pinout, SN74BCT29827BNT application, or SN74BCT29827BNT equivalent, key selection criteria include 3-state timing (tPZH ≤ 10.6 ns), VCC = 4.5–5.5 V operation, IOL = 96 mA drive strength, and flow-through pinout for PCB layout optimization.
Technical Context
This device implements a dual-gated 3-state control architecture: both OE1 and OE2 must be low to enable outputs; either high forces all ten Y outputs into high-impedance. Inputs use P-N-P structure to minimize DC loading on upstream logic.
BiCMOS design delivers TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V), rail-to-rail output swing (VOH ≥ 2.4 V at IOL = 48 mA), and ultra-low quiescent current in 3-state (ICCZ ≤ 6 mA at VCC = 5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS systems without level-shifting. |
| IOL per Output | 96 mA - Supports direct driving of heavy capacitive loads (e.g., >100 pF buses) without external buffers. |
| tPZH (OE→Y) | 10.6 ns max - Enables fast bus release timing critical for high-speed memory address latching. |
| ICCZ (3-State) | 6 mA max - Reduces system standby power in multi-driver bus architectures. |
| Input Clamp Current | −18 mA - Protects against transient overvoltage (e.g., ESD events) without external diodes. |
| Operating Temp | 0°C to 70°C - Qualified for commercial-grade embedded systems including industrial HMIs and PLC modules. |
Pinout & Package
SN74BCT29827BNT is supplied in a 24-pin plastic small-outline integrated circuit (SOIC) package, designated NT by Texas Instruments, with 300-mil width and standard JEDEC MO-002AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | OE1, OE2 | Active-low 3-state enables - Dual-input AND logic ensures fail-safe high-Z during power sequencing or control faults. |
| 2–11, 14–23 | A1–A10, Y1–Y10 | Buffer input/output pairs - Flow-through arrangement (A1→Y1 at pins 2/23, A2→Y2 at 3/22, etc.) minimizes trace crossovers. |
| 12 | GND | Ground reference - Dedicated pin adjacent to VCC (pin 24) reduces ground bounce in high-speed switching. |
| 24 | VCC | Power supply - Decoupling capacitor placement is optimized by proximity to GND (pin 12) and symmetric pin layout. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Output Stage | Delivers 96 mA sink current while maintaining <6 mA ICCZ in 3-state - eliminates need for discrete pull-down networks in bus-hold designs. |
| P-N-P Input Structure | Reduces input DC loading to ≤0.2 mA (IIL) - prevents voltage droop on weak-drive microcontroller GPIOs or legacy TTL outputs. |
| Flow-Through Pinout | Input A1–A10 and output Y1–Y10 arranged in mirrored sequence across package - cuts PCB layer count by enabling straight-layer routing. |
| ESD Protection | ≥2000 V HBM and ≥200 V MM - meets IEC 61000-4-2 Level 3 for industrial equipment without external TVS diodes. |
Applications
| Industrial Backplane Bus Interface | Memory Address Buffering |
|---|---|
Use Scenario: Isolating CPU address lines from multiple peripheral slots in modular PLC chassis. IC Role / Device Role / Timing Role: 10-bit unidirectional buffer with simultaneous 3-state control for hot-swap slot arbitration. Use Value: tPZH ≤ 10.6 ns ensures address bus release before next cycle's setup time; 96 mA drive sustains signal integrity across 15 cm backplane traces. |
Use Scenario: Driving 16-bit address bus segments in legacy 80C188-based motion controller. IC Role / Device Role / Timing Role: Non-inverting level translator and fanout amplifier between microcontroller and SRAM/Flash chips. Use Value: VOH ≥ 2.4 V at 48 mA guarantees TTL-compatible logic '1' under worst-case termination; BiCMOS speed avoids wait-state insertion. |
| High-Density Data Path Isolation | Legacy System Bus Expansion |
Use Scenario: Adding parallel I/O expansion to an ISA-bus industrial PC without modifying motherboard layout. IC Role / Device Role / Timing Role: Bidirectional bus driver (with external direction control) for 10-bit data lanes. Use Value: Dual OE inputs allow independent gating of upper/lower nibbles; ICCZ ≤ 6 mA prevents thermal derating in dense 4-layer boards. |
Use Scenario: Replacing obsolete 74F244 in retrofitted CNC machine tool controllers. IC Role / Device Role / Timing Role: Pin-compatible upgrade delivering higher drive strength and lower static power than F-series equivalents. Use Value: Identical SOIC-24 footprint (NT) and logic function enables drop-in replacement; 96 mA IOL supports modern optocoupler input thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT244N | 8-bit (not 10-bit); CMOS input, no P-N-P structure; IOL = 24 mA; tPZH = 9.5 ns | Lacks dual OE control; insufficient drive for >50 pF bus loads; requires two devices for 10-bit coverage | Select when space-constrained layouts prioritize speed over drive strength and bit-width match is flexible. |
| SN74LS244N | Bipolar TTL; IOL = 15 mA; ICCZ = 32 mA; no BiCMOS efficiency; VCC = 4.75–5.25 V only | Higher power dissipation limits density; incompatible with 5.5 V tolerant systems; slower tPLH (15 ns) | Choose only for legacy repair where exact LS-family timing and voltage margins are mandated. |
Compared with SN74ACT244N and SN74LS244N, the SN74BCT29827BNT uniquely combines 10-bit width, dual 3-state control, 96 mA drive, and BiCMOS low-ICCZ-making it the sole option for high-fanout, low-power, single-package bus isolation in commercial-temperature industrial systems.
Availability
SN74BCT29827BNT is available at Aetrix Electronics and suitable for industrial backplane bus interface, memory address buffering, and high-density data path isolation requiring stable component supply across extended production cycles.
Supply support for SN74BCT29827BNT 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 SN74BCT29827BNT belongs to TI's BCT (Bipolar-CMOS Transistor) logic family, engineered specifically for high-drive, low-quiescent-power bus interfacing in commercial-temperature industrial control systems.
FAQ
What is the maximum output sink current specification for SN74BCT29827BNT?
The SN74BCT29827BNT is rated for 96 mA low-level output current (IOL) per Y output at VCC = 4.5 V and TA = 25°C. This value is confirmed in the "recommended operating conditions" table of the official SCBS008C datasheet and enables direct driving of heavy capacitive loads without external amplification. The SN74BCT29827BNT maintains this rating across its full 0°C to 70°C operating range.
Does SN74BCT29827BNT support true bidirectional data flow?
No, the SN74BCT29827BNT is a unidirectional 10-bit buffer: signals flow only from A1–A10 inputs to Y1–Y10 outputs. It lacks internal direction control or bus transceiver logic. Bidirectional operation requires external control of OE1/OE2 and companion devices - the SN74BCT29827BNT itself does not implement automatic direction sensing or auto-reversing functionality.
What is the meaning of "NT" in SN74BCT29827BNT?
The "NT" suffix in SN74BCT29827BNT denotes Texas Instruments' plastic small-outline IC (SOIC) package with 24 leads and 300-mil body width - identical in mechanical dimensions and footprint to the DW package variant but historically assigned distinct orderable part numbers for tube packaging and marking differentiation. Both NT and DW share identical electrical specs and pinout.
How does the dual OE architecture of SN74BCT29827BNT improve system reliability?
The SN74BCT29827BNT uses two active-low enable inputs (OE1 and OE2) wired as an AND gate: both must be low to activate outputs. This design ensures automatic high-impedance state during power-up/down, reset assertion, or single-control-line failure - preventing bus contention in fault conditions. The SN74BCT29827BNT remains safely isolated even if one enable line floats or shorts.
Can SN74BCT29827BNT operate at 3.3 V supply voltage?
No, the SN74BCT29827BNT is specified only for VCC = 4.5 V to 5.5 V operation per its recommended operating conditions. Applying 3.3 V violates the minimum supply requirement and will result in undefined logic thresholds, degraded noise margins, and unreliable 3-state control. For 3.3 V systems, TI recommends the SN74LVC244A or similar LVC-family devices instead of the SN74BCT29827BNT.
SN74BCT29827BNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
SN74BCT29827BNT FAQ
1.How can I place an order for SN74BCT29827BNT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT29827BNT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74BCT29827BNT reliable?
The price and inventory of SN74BCT29827BNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT29827BNT is usually 5 days.
3.What payment methods are accepted for SN74BCT29827BNT?
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4.How is shipping managed for SN74BCT29827BNT?
SN74BCT29827BNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT29827BNT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74BCT29827BNT?
For technical support, including SN74BCT29827BNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT29827BNT requirements.
6.How does Aetrix verify that SN74BCT29827BNT is sourced from the original manufacturer or authorized distributors?
All SN74BCT29827BNT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74BCT29827BNT meets industry standards.
7.What is the process for return or replacement of SN74BCT29827BNT?
All SN74BCT29827BNT units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT29827BNT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74BCT29827BNT part is unused and in its original packaging.
Return procedure for SN74BCT29827BNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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