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Texas Instruments SN64BCT244DWRG4
- Part No.:
- SN64BCT244DWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN64BCT244DWRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
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Product details
Overview
SN64BCT244DWRG4 from Texas Instruments is an octal noninverting buffer/line driver with dual 4-bit sections, 3-state outputs, BiCMOS technology, and operation from −40°C to 85°C. It drives memory address buses or clock distribution lines with 64 mA sink current per output and high-impedance state during power-up/down.
For engineers reviewing the SN64BCT244DWRG4 datasheet, SN64BCT244DWRG4 pinout, SN64BCT244DWRG4 application, or SN64BCT244DWRG4 equivalent, key selection criteria include 3-state bus driving capability, low ICCZ quiescent current (4–10 mA), BiCMOS input loading reduction, and SOIC-20 package compatibility with legacy 5-V TTL systems.
Technical Context
The SN64BCT244DWRG4 implements two independent 4-bit noninverting buffers, each controlled by a dedicated active-low output-enable (OE) input. Its P-N-P input structure reduces DC loading on upstream logic, while BiCMOS design minimizes ICCZ supply current in high-impedance states.
Outputs enter high-impedance below ~3 V supply voltage during power sequencing, supporting hot-swap and bus isolation. Propagation delays are specified at 0.9–9.8 ns (tPLH/tPHL/tPZH/tPZL) under 50-pF load and 500-Ω source impedance across −40°C to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Operates within standard 5-V TTL supply tolerance band. |
| IOL per Output | 64 mA - Sinks sufficient current to drive multiple TTL inputs or terminated transmission lines. |
| ICCZ Quiescent Current | 4–10 mA - Low standby supply current enables stable bus hold without excessive power draw. |
| tPLH / tPHL | 0.9–6.0 ns - Supports high-speed address or clock buffering up to ~100 MHz system timing. |
| VIK Input Clamp Voltage | −1.2 V - Enables robust negative transient immunity with −18 mA clamp current rating. |
| Operating Temperature | −40°C to 85°C - Qualified for industrial-grade embedded control and instrumentation environments. |
Pinout & Package
SN64BCT244DWRG4 is packaged in a 20-pin SOIC (DW) with 1.27-mm pitch, 7.5-mm body width, and 2.65-mm max height per JEDEC MS-013. Pin 1 marked via notch or bevel; pin 1 quadrant Q1 per TI tape-and-reel spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit section; asserts high-impedance when high. |
| 1A1–1A4, 2A1–2A4 | Noninverting data inputs | Accept TTL-compatible logic levels; P-N-P inputs reduce DC loading on drivers. |
| 1Y1–1Y4, 2Y1–2Y4 | Noninverting 3-state outputs | Drive bus lines with 64 mA sink capability; high-Z during power ramp or OE high. |
| VCC (Pin 20) | Positive supply | 5-V nominal; supports 4.5–5.5 V range with defined VOH/VOL performance. |
| GND (Pin 10) | Ground reference | Common return for all I/O and supply currents; decoupling required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Reduces ICCZ to 4–10 mA - lowers system-level standby power in buffered address paths. |
| P-N-P input structure | Minimizes DC input loading - preserves fanout margin when driving from older TTL or BCT logic. |
| Power-up/power-down high-Z | Outputs remain tri-stated below ~3 V - prevents bus contention during supply sequencing. |
| SOIC-20 (DW) package | Industry-standard footprint compatible with automated assembly and legacy PCB layouts. |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving 16-bit address bus between microcontroller and SRAM/ROM in industrial PLCs. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from memory address inputs. Use Value: Prevents bus contention during reset via power-ramp high-Z behavior and supports 64 mA per line for multi-chip decoding. | Use Scenario: Distributing system clock to multiple peripheral ICs in test equipment. IC Role / Device Role / Timing Role: Fanout buffer replicating clean 5-V TTL clock signal with matched propagation delay. Use Value: Delivers sub-6 ns tPLH/tPHL consistency across all eight outputs, minimizing skew in synchronous subsystems. |
| Bus Transceiver Interface | Legacy System Expansion |
Use Scenario: Isolating ISA or VME bus segments in retro-computing hardware upgrades. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling controlled data flow between master and slave cards. Use Value: Dual OE inputs allow precise timing control of direction switching; 3-state outputs prevent bus lockup during arbitration. | Use Scenario: Adding parallel I/O expansion to vintage 8086/80286-based controllers. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer for legacy 5-V TTL peripheral address/data latching. Use Value: P-N-P inputs tolerate higher input leakage from aging logic; SOIC-20 footprint fits existing board real estate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74BCT244N | Dual-in-line (PDIP-20) package; identical electrical specs and pinout. | Suitable for through-hole prototyping or legacy repair; lacks SOIC thermal/mounting advantages. | Select for hand-soldered evaluation or field replacement where SOIC rework is impractical. |
| SN64BCT244NSR | Same SO package (NS), different reel packaging (2000 pcs vs. 25 pcs); identical die and markings. | Optimized for high-volume SMT production; same footprint and performance as SN64BCT244DWRG4. | Select for volume manufacturing with automated pick-and-place; functionally interchangeable. |
Compared with SN74BCT244N and SN64BCT244NSR, the SN64BCT244DWRG4 offers identical core functionality in a small-outline package optimized for space-constrained industrial PCBs, with verified 5-V TTL compatibility and power-ramp safe operation - making it ideal for new designs requiring surface-mount reliability and legacy interface support.
Availability
SN64BCT244DWRG4 is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, and bus transceiver interfacing requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for SN64BCT244DWRG4 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 delivering analog, embedded processing, and logic solutions with over 90 years of innovation in industrial, automotive, and communications markets.
The SN64BCT244DWRG4 belongs to TI's BCT logic family, designed specifically for high-density, high-drive 3-state memory address and clock buffering in 5-V TTL systems requiring robust power sequencing behavior.
FAQ
What is the maximum output sink current per channel for SN64BCT244DWRG4?
The SN64BCT244DWRG4 supports a guaranteed 64 mA low-level output current (IOL) per Y output under recommended operating conditions (VCC = 4.5 V, TA = −40°C to 85°C). This enables direct driving of multiple TTL loads or terminated transmission lines without external amplification. The device maintains this rating across its full industrial temperature range and is validated per TI's SCBS027A datasheet.
Does SN64BCT244DWRG4 support hot-swap or power-ramp-safe operation?
Yes, the SN64BCT244DWRG4 enters a high-impedance state when VCC drops below approximately 3 V during power-down or rises from zero during power-up. This behavior is explicitly characterized in the datasheet and prevents bus contention in systems with asynchronous supply sequencing. The feature applies to all eight outputs simultaneously and requires no external circuitry.
What is the input structure of SN64BCT244DWRG4, and why does it matter?
The SN64BCT244DWRG4 uses P-N-P input transistors, which significantly reduce DC input loading compared to standard TTL inputs. This allows the device to interface cleanly with older logic families (e.g., 74LS, 74S) without degrading fanout margins. The reduced IIH/IIL values (20 µA/−1 mA) are confirmed in the electrical characteristics table of the SCBS027A datasheet.
Is SN64BCT244DWRG4 pin-compatible with SN74BCT244N?
Yes, SN64BCT244DWRG4 and SN74BCT244N share identical pin functions and logic behavior, differing only in package type (SOIC-20 vs. PDIP-20). The pin numbering, signal assignments (1OE, 1A1–1A4, 1Y1–1Y4, etc.), and functional truth table are fully aligned per TI's documentation. No PCB redesign is needed when migrating between these packages.
What is the typical propagation delay for SN64BCT244DWRG4 at 5 V?
At VCC = 5 V, CL = 50 pF, and TA = 25°C, the SN64BCT244DWRG4 exhibits typical propagation delays of 2.5 ns (tPLH) and 3.2 ns (tPHL) from A to Y, and 5.7 ns (tPZH) and 5.9 ns (tPZL) from OE to Y. These values are measured under standardized load conditions and are specified in the switching characteristics table of the SCBS027A datasheet.
SN64BCT244DWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 64BCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 15mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN64BCT244DWRG4 FAQ
1.How can I place an order for SN64BCT244DWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN64BCT244DWRG4 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 SN64BCT244DWRG4 reliable?
The price and inventory of SN64BCT244DWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT244DWRG4 is usually 5 days.
3.What payment methods are accepted for SN64BCT244DWRG4?
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4.How is shipping managed for SN64BCT244DWRG4?
SN64BCT244DWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN64BCT244DWRG4 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 SN64BCT244DWRG4?
For technical support, including SN64BCT244DWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT244DWRG4 requirements.
6.How does Aetrix verify that SN64BCT244DWRG4 is sourced from the original manufacturer or authorized distributors?
All SN64BCT244DWRG4 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 SN64BCT244DWRG4 meets industry standards.
7.What is the process for return or replacement of SN64BCT244DWRG4?
All SN64BCT244DWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT244DWRG4, 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 SN64BCT244DWRG4 part is unused and in its original packaging.
Return procedure for SN64BCT244DWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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