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Texas Instruments SN64BCT245DWR
- Part No.:
- SN64BCT245DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN64BCT245DWR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,544
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Product details
Overview
SN64BCT245DWR from Texas Instruments is an octal bus transceiver with BiCMOS design, 3-state true outputs, and direction-controlled bidirectional data flow between A and B buses. It operates from −40°C to 85°C at 4.5–5.5 V supply, supports 64 mA low-level output current on B-side, and features high-impedance state during power up/down for bus isolation in industrial control backplanes.
For engineers reviewing the SN64BCT245DWR datasheet, SN64BCT245DWR pinout, SN64BCT245DWR application, or SN64BCT245DWR equivalent, key selection criteria include its 20-pin SOIC (DW) package, DIR/OE dual-control logic, ±15 mA high-level output drive on B-bus, and guaranteed 7 ns max propagation delay under 50 pF load.
Technical Context
The SN64BCT245DWR implements asynchronous bidirectional bus communication using a single DIR input to select A→B or B→A data path, and an active-low OE input to place all outputs in high-impedance state. Its BiCMOS architecture enables low ICCZ (10–15 mA) while delivering TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V) and robust drive capability.
It guarantees safe operation during supply ramp-up/down via automatic high-Z behavior below ~3 V VCC, and meets MIL-STD-883C ESD protection (>2000 V). Switching performance is characterized across −40°C to 85°C with tPLH/tPHL ≤ 7 ns and tPZH/tPZL ≤ 11.2 ns at 5 V/50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - Ensures compatibility with standard 5 V TTL/CMOS systems and margin against rail droop. |
| Operating Temperature | −40°C to 85°C - Qualified for industrial-grade embedded control and automation environments. |
| B-Side IOL | 64 mA - Drives heavy capacitive loads (e.g., multi-drop bus traces) without external buffers. |
| tPLH / tPHL | ≤ 7 ns @ 5 V/50 pF - Enables reliable timing in high-speed parallel data transfer up to ~100 MHz effective rate. |
| ICCZ (Quiescent) | 10–15 mA - Low standby current preserves system power budget when device is enabled but idle. |
| VOL (B-side) | 0.42–0.55 V @ 64 mA - Maintains solid logic-low margin under full load, preventing false switching in noise-prone backplanes. |
| ESD Protection | >2000 V HBM - Survives handling and board-level electrostatic events per MIL-STD-883C Method 3015. |
Pinout & Package
SN64BCT245DWR is housed in a 20-pin SOIC (DW) package with 0.51 mm pitch, 7.6 mm body width, and 12.83 mm length per TI DW0020A outline. Pin 1 is marked by a beveled corner and located at top-left when notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Low = B→A data transfer; High = A→B data transfer - determines real-time bus flow direction. |
| 2–9 (A1–A8) | A-Bus Data Inputs/Outputs | Bi-directional I/O ports connected to source-side bus; driven high-Z when OE = High or VCC < ~3 V. |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output drivers; must be low-inductance connection. |
| 11–18 (B1–B8) | B-Bus Data Inputs/Outputs | Bi-directional I/O ports connected to sink-side bus; deliver 64 mA sink current capability on low state. |
| 19 (OE) | Output Enable Input | Active-low control: OE = Low enables transceiver; OE = High forces all A/B pins into high-impedance state. |
| 20 (VCC) | Power Supply | +5 V nominal supply; powers BiCMOS output stage and input buffers; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Output Stage | Reduces ICCZ to 10–15 mA versus bipolar-only equivalents, lowering system power in always-on bus interfaces. |
| Power-Up/Down High-Z | Automatically enters high-impedance state when VCC < ~3 V - prevents bus contention during supply sequencing. |
| TTL-Compatible Thresholds | VIH = 2 V, VIL = 0.8 V - ensures interoperability with legacy 5 V TTL logic families without level-shifting. |
| 3-State True Outputs | No inversion on A or B ports - simplifies PCB routing and eliminates need for external inverters in bus arbitration. |
| MIL-STD-883C ESD Robustness | >2000 V HBM - reduces field failure risk in manufacturing, test, and deployment environments. |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
|
Use Scenario: Isolating and extending parallel address/data buses between CPU modules and I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing A→B and B→A data flow under DIR control, with OE-gated isolation during hot-swap events. Use Value: 64 mA B-side drive sustains signal integrity across 15 cm backplane traces; high-Z during power sequencing prevents module insertion glitches. |
Use Scenario: Interfacing modern microcontroller peripherals with older ISA-style peripheral cards requiring 5 V TTL signaling. IC Role / Device Role / Timing Role: Level-consistent bus translator enabling direct connection between 5 V MCUs and legacy 5 V peripheral buses. Use Value: TTL-compatible VIH/VIL thresholds eliminate external level shifters; 7 ns propagation supports 10 MHz bus clock domains. |
| Test Equipment Data Path | Automated Test Fixture Control |
|
Use Scenario: Routing stimulus/response data between pattern generator and DUT interface boards in ATE systems. IC Role / Device Role / Timing Role: Directionally configurable data conduit synchronized to test controller's DIR and OE signals for precise vector timing. Use Value: Guaranteed tPZH ≤ 11.2 ns ensures predictable enable-to-output delay; BiCMOS design minimizes ground bounce during parallel switching. |
Use Scenario: Controlling multiple relay banks and sensor readback lines in factory-floor test fixtures with shared 5 V bus infrastructure. IC Role / Device Role / Timing Role: Isolation switch enabling/disabling groups of I/O lines via OE, with DIR selecting between control command and status feedback paths. Use Value: High-impedance state during power cycling prevents relay chatter; 2000 V ESD rating withstands repeated operator contact in ungrounded environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74BCT245DW | Same BiCMOS architecture and pinout, but rated only for 0°C to 70°C operation - lacks extended temperature qualification. | Not suitable for industrial environments exceeding 70°C ambient or requiring −40°C cold-start capability. | Select SN64BCT245DWR when full −40°C to 85°C operation is mandatory; SN74BCT245DW may reduce cost in commercial-grade systems. |
| SN64LVTH245RGYR | 3.3 V LVTH family with 24 mA IOL, 1.8–3.6 V supply range, and different voltage thresholds (VIH = 2 V, VIL = 0.7 V). | Requires level translation when interfacing with 5 V buses; not a drop-in replacement due to supply and logic threshold mismatch. | Choose SN64LVTH245RGYR only in new 3.3 V system designs; SN64BCT245DWR remains optimal for existing 5 V infrastructure. |
Compared with SN74BCT245DW and SN64LVTH245RGYR, the SN64BCT245DWR uniquely combines industrial temperature range, 5 V TTL compatibility, and 64 mA drive strength - making it irreplaceable in legacy 5 V backplane upgrades where thermal margin and bus loading are critical.
Availability
SN64BCT245DWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus extensions, automated test fixture control, and 5 V microcontroller peripheral bridging requiring stable component supply across extended temperature ranges.
Supply support for SN64BCT245DWR 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 SN64BCT245DWR belongs to TI's BCT (Bipolar-CMOS Transceiver) logic family, engineered specifically for robust, high-drive 5 V bus interfacing in electrically noisy and thermally demanding industrial control systems.
FAQ
What is the operating temperature range for the SN64BCT245DWR?
The SN64BCT245DWR is characterized for operation from −40°C to 85°C, meeting industrial-grade environmental requirements. This range is explicitly confirmed in the absolute maximum ratings and recommended operating conditions tables of the SCBS040A datasheet, and distinguishes it from commercial variants like the SN74BCT245DW.
Does the SN64BCT245DWR support 3.3 V logic levels?
No, the SN64BCT245DWR is designed exclusively for 5 V operation with TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and requires VCC = 4.5–5.5 V. It does not guarantee functionality at 3.3 V supply or accept 3.3 V inputs as valid logic levels - use SN64LVTH245RGYR for 3.3 V systems.
What is the maximum output current the SN64BCT245DWR can sink on the B-side pins?
The SN64BCT245DWR guarantees a minimum low-level output current (IOL) of 64 mA per B1–B8 pin at VCC = 4.5 V and VOL ≤ 0.55 V. This value is specified in the recommended operating conditions table and verified across the full −40°C to 85°C temperature range.
How does the SN64BCT245DWR behave during power-up and power-down?
The SN64BCT245DWR automatically places all A and B pins in high-impedance state whenever VCC drops below approximately 3 V - a feature documented in the functional description and electrical characteristics sections. This prevents bus contention during supply ramping and supports hot-swap-capable system architectures.
Is the SN64BCT245DWR pin-compatible with the SN74BCT245DW?
Yes, the SN64BCT245DWR and SN74BCT245DW share identical pinout, package (SOIC-20 DW), and functional logic diagram. However, they differ in temperature rating: SN64BCT245DWR is qualified for −40°C to 85°C, while SN74BCT245DW is limited to 0°C to 70°C - a critical distinction for industrial deployment.
SN64BCT245DWR 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:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 3mA, 24mA; 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
SN64BCT245DWR FAQ
1.How can I place an order for SN64BCT245DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN64BCT245DWR 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 SN64BCT245DWR reliable?
The price and inventory of SN64BCT245DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT245DWR is usually 5 days.
3.What payment methods are accepted for SN64BCT245DWR?
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4.How is shipping managed for SN64BCT245DWR?
SN64BCT245DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN64BCT245DWR 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 SN64BCT245DWR?
For technical support, including SN64BCT245DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT245DWR requirements.
6.How does Aetrix verify that SN64BCT245DWR is sourced from the original manufacturer or authorized distributors?
All SN64BCT245DWR 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 SN64BCT245DWR meets industry standards.
7.What is the process for return or replacement of SN64BCT245DWR?
All SN64BCT245DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT245DWR, 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 SN64BCT245DWR part is unused and in its original packaging.
Return procedure for SN64BCT245DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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