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Texas Instruments SN74BCT2827CDW
- Part No.:
- SN74BCT2827CDW
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74BCT2827CDW.pdf
- Description:
- IC BUF NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,469
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Product details
Overview
SN74BCT2827CDW from Texas Instruments is a 10-bit BiCMOS non-inverting buffer/driver with dual active-low 3-state enable inputs (OE1, OE2), designed specifically for driving MOS DRAM input capacitance. It features 25-Ω output impedance, 5-V supply operation (4.5–5.5 V), 12 mA sink current capability, and flow-through pinout for optimized PCB layout in memory address/data bus applications.
For engineers reviewing the SN74BCT2827CDW datasheet, SN74BCT2827CDW pinout, SN74BCT2827CDW application, or SN74BCT2827CDW equivalent, key selection criteria include its dual 3-state control logic, guaranteed high-impedance during power-up/down, BiCMOS low ICCZ quiescent current, and SOIC-24 package compatibility with legacy memory interface designs.
Technical Context
This device implements a dual-gated 2-input AND logic structure for 3-state control: outputs enter high-impedance when either OE1 or OE2 is high. Its BiCMOS process delivers low ICCZ (3.8–6 mA) while maintaining TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and robust drive strength (IOL = 12 mA at VOL ≤ 0.5 V).
The flow-through architecture aligns inputs (pins 1–11, 13) and outputs (pins 14–24, 12) on opposite sides of the SOIC-24 package, minimizing trace crossovers. Output ports integrate on-die 25-Ω series resistors-eliminating external termination-and support bus driving with controlled edge rates (tPLH/tPHL ≤ 6 ns at 5 V, CL = 50 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Operates within standard 5-V TTL/CMOS rail with margin for noise immunity. |
| Output Sink Current | 12 mA - Drives heavy capacitive loads (e.g., MOS DRAM address lines) without external buffers. |
| Propagation Delay | ≤6 ns (tPHL), ≤6 ns (tPLH) - Enables high-speed memory bus timing in systems up to ~160 MHz. |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - Fully compatible with TTL-level logic sources and mixed-voltage interfaces. |
| Quiescent Current | ICCZ = 3.8–6 mA - BiCMOS design reduces standby power vs. bipolar-only equivalents. |
| ESD Protection | >2000 V (MIL-STD-883C, Method 3015) - Robust handling during board assembly and field service. |
| Operating Temperature | 0°C to 70°C - Qualified for commercial-grade embedded and industrial control applications. |
Pinout & Package
SN74BCT2827CDW is housed in a 24-pin SOIC (DW) package with 300-mil width, moisture sensitivity level 1, and NiPdAu lead finish. Pin 12 is GND; Pin 24 is VCC. The flow-through layout places all 10 inputs (A1–A10) and dual enables (OE1, OE2) on the left side and all 10 outputs (Y1–Y10) plus GND/VCC on the right side, enabling straight-line PCB routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | OE1, OE2 | Dual active-low 3-state enable inputs - OR logic: either high forces all Yn into high-Z. |
| 2–11, 14 | A1–A10 | Non-inverting data inputs - Directly connect to CPU/memory controller address or data lines. |
| 15–24, 12 | Y1–Y10, GND | Buffered outputs with integrated 25-Ω series resistance - Drive DRAM inputs without external termination. |
| 24 | VCC | Positive supply - Must be decoupled locally; powers BiCMOS output stage and input buffers. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Reduces ICCZ to 3.8–6 mA - lowers system power in always-on memory interface circuits. |
| Integrated 25-Ω output resistors | Eliminates need for 10 external series resistors - saves board space and BOM cost in 10-bit buses. |
| Power-up high-impedance state | Prevents bus contention during power sequencing - critical for hot-swap and multi-rail systems. |
| Flow-through pin arrangement | Enables linear trace routing across package - reduces layer count and signal crosstalk in dense layouts. |
| TTL-compatible input thresholds | Accepts standard 5-V logic levels without level-shifting - simplifies integration with legacy microcontrollers. |
Applications
| DRAM Address Buffering | Parity Bus Interface |
|---|---|
|
Use Scenario: Driving 10-bit address lines to multiple MOS DRAM chips in a memory subsystem. IC Role / Device Role / Timing Role: Non-inverting buffer with dual 3-state control synchronizing address latching across banks. Use Value: Integrated 25-Ω outputs suppress ringing on long traces; flow-through pinout minimizes skew between A0–A9. |
Use Scenario: Isolating and buffering parity bits across a wide data path (e.g., 64-bit + 8-bit parity). IC Role / Device Role / Timing Role: Bidirectional-capable bus driver enabling parity generation/checking without contention. Use Value: Guaranteed high-Z during power transitions prevents false parity errors during system reset or sleep entry. |
| Legacy CPU Bus Expansion | Industrial Memory Controller Interface |
|
Use Scenario: Extending address/data bus width in retro-computing or industrial PLC backplanes. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer for 5-V TTL buses interfacing with older microprocessors (e.g., 8086, Z80). Use Value: 12 mA sink current drives >10 LS-TTL loads; tPHL/tPLH ≤ 6 ns meets 8-MHz bus timing budgets. |
Use Scenario: Interfacing real-time controllers to external SRAM or flash memory arrays in factory automation. IC Role / Device Role / Timing Role: Isolation buffer ensuring clean address strobes and preventing back-drive during memory read/write cycles. Use Value: ESD rating >2000 V supports ruggedized deployment; 0°C to 70°C range covers extended industrial ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit bus driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT244N | Octal (8-bit), not 10-bit; ACT logic family offers higher speed (tPD ≈ 3 ns) but no integrated 25-Ω resistors. | Lacks native DRAM-optimized drive strength and flow-through layout; requires external termination. | Choose when octal width suffices and faster propagation is prioritized over DRAM-specific drive characteristics. |
| 74F244SC | F-family bipolar process; higher ICCZ (≈25 mA), no power-up high-Z, and no on-die 25-Ω resistors. | Higher power consumption and less robust ESD protection (1500 V); unsuitable for hot-swap or low-power memory interfaces. | Select only for legacy F-series board replacements where BiCMOS advantages are secondary to pinout familiarity. |
Compared with SN74BCT2827CDW, SN74ACT244N provides higher speed but reduced drive optimization for DRAM loads, while 74F244SC trades power efficiency and ESD robustness for raw legacy compatibility-neither matches the integrated 25-Ω termination or guaranteed power-up high-Z behavior of SN74BCT2827CDW.
Availability
SN74BCT2827CDW is available at Aetrix Electronics and suitable for DRAM address buffering, parity bus interfacing, and legacy CPU bus expansion requiring stable component supply, long-lifecycle support, and commercial-temperature 5-V logic compatibility.
Supply support for SN74BCT2827CDW 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, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
SN74BCT2827CDW belongs to TI's BCT (Bipolar-CMOS Transistor) logic family, engineered for high-speed, low-power memory interface applications where drive strength, bus isolation, and layout efficiency are critical.
FAQ
What is the function of the dual OE inputs on the SN74BCT2827CDW?
The SN74BCT2827CDW uses two active-low 3-state enable inputs (OE1 and OE2) wired as an AND gate: if either OE1 or OE2 is high, all ten outputs (Y1–Y10) enter high-impedance mode. This allows flexible bus arbitration-such as using OE1 for system-wide control and OE2 for local module enable-without external logic. The SN74BCT2827CDW maintains this behavior across its full 0°C to 70°C operating range.
Does the SN74BCT2827CDW require external series resistors for DRAM driving?
No. The SN74BCT2827CDW integrates 25-Ω series resistors on all ten outputs, explicitly designed to match typical PCB trace impedance and dampen reflections when driving MOS DRAM inputs. This eliminates the need for ten discrete 25-Ω resistors, reducing BOM count and layout complexity. The SN74BCT2827CDW datasheet confirms this feature under "Output Ports Have Equivalent 25-Ω Resistors."
Is the SN74BCT2827CDW pin-compatible with other 24-pin SOIC bus drivers?
No. The SN74BCT2827CDW has a unique flow-through pinout (inputs on left, outputs on right) optimized for memory bus routing-not shared with standard octal drivers like the 74LS244 or 74ACT244. Its 10-bit width, dual OE placement (pins 1 and 13), and GND/VCC positions (pins 12 and 24) differ from common 24-pin logic ICs. Always verify against the SN74BCT2827CDW pin diagram before substitution.
What is the maximum capacitive load the SN74BCT2827CDW can drive reliably?
The SN74BCT2827CDW is characterized for CL = 50 pF in switching tests, with tPLH/tPHL ≤ 6 ns at 5 V. Its 12 mA output sink current and 25-Ω on-die resistance support stable driving of typical DRAM input capacitances (20–40 pF per pin) across 10-bit buses. For heavier loads (>70 pF), derate timing margins or add local decoupling-the SN74BCT2827CDW specification does not guarantee performance beyond 50 pF without additional design validation.
How does the SN74BCT2827CDW behave during power-up and power-down?
The SN74BCT2827CDW guarantees high-impedance outputs during both power-up and power-down transitions, preventing bus contention or undefined states that could corrupt memory operations. This behavior is inherent to its BiCMOS design and does not require external reset circuitry. The SN74BCT2827CDW maintains this safe state across its full 0°C to 70°C temperature range and 4.5–5.5 V supply window.
SN74BCT2827CDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 1mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
SN74BCT2827CDW FAQ
1.How can I place an order for SN74BCT2827CDW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT2827CDW 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 SN74BCT2827CDW reliable?
The price and inventory of SN74BCT2827CDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT2827CDW is usually 5 days.
3.What payment methods are accepted for SN74BCT2827CDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT2827CDW transactions.
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4.How is shipping managed for SN74BCT2827CDW?
SN74BCT2827CDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT2827CDW 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 SN74BCT2827CDW?
For technical support, including SN74BCT2827CDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT2827CDW requirements.
6.How does Aetrix verify that SN74BCT2827CDW is sourced from the original manufacturer or authorized distributors?
All SN74BCT2827CDW 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 SN74BCT2827CDW meets industry standards.
7.What is the process for return or replacement of SN74BCT2827CDW?
All SN74BCT2827CDW units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT2827CDW, 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 SN74BCT2827CDW part is unused and in its original packaging.
Return procedure for SN74BCT2827CDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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