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Texas Instruments SN74CBT16244CDGVR
- Part No.:
- SN74CBT16244CDGVR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBT16244CDGVR.pdf
- Description:
- IC BUS SWITCH 4 X 1:1 48TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
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Product details
Overview
SN74CBT16244CDGVR from Texas Instruments is a 16-bit FET bus switch IC organized as four independent 4-bit low-impedance switches, featuring 5-Ω typical on-state resistance, TTL-compatible control inputs, and bidirectional signal routing between port A and port B. It operates from 4 V to 5.5 V over –55°C to 125°C and is used in high-speed digital backplane and memory interface isolation.
For engineers reviewing the SN74CBT16244CDGVR datasheet, SN74CBT16244CDGVR pinout, SN74CBT16244CDGVR application, or SN74CBT16244CDGVR equivalent, key selection criteria include on-resistance matching across channels, propagation delay under 0.35 ns at 5 V, OE-controlled bidirectional isolation, and TVSOP-48 package thermal performance (θJA = 58°C/W).
Technical Context
The SN74CBT16244CDGVR implements four independent CMOS transmission-gate-based bus switches, each controlled by a dedicated active-low output-enable (OE) input. Its architecture enables true bidirectional signal flow with no internal directionality-data passes identically from A-to-B or B-to-A when enabled.
Each switch exhibits minimal RC delay due to low 5–7 Ω on-resistance and 4.5 pF off-capacitance, supporting clean signal integrity for 50-pF loads. The device requires no level translation and maintains TTL-compatible VIH/VIL thresholds (2.0 V/0.8 V) while operating from a single 4–5.5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5 Ω typical at VCC = 4.5 V, VI = 0 V, II = 30 mA - ensures sub-150 mV voltage drop at 30 mA, preserving logic-level margins. |
| Propagation delay (tpd) | 0.25 ns max at VCC = 5 V, CL = 50 pF - enables >1 GHz signal switching without timing skew across 16 bits. |
| Supply voltage range | 4 V to 5.5 V - compatible with 5-V TTL and mixed-voltage systems; not rated for 3.3-V operation. |
| Operating temperature | –55°C to 125°C - qualified for extended industrial and military-grade environments, unlike commercial-grade DGG/DL variants. |
| Off-state capacitance (Cio(OFF)) | 4.5 pF max at VO = 3 V or 0 V, OE = VCC - minimizes capacitive loading and crosstalk during isolation. |
| Input leakage current | ±1 µA max at VCC = 5.5 V, VI = VCC or GND - supports high-impedance bus hold and low-power standby states. |
| Enable/disable time (ten/tdis) | 5.1 ns / 5.4 ns max at VCC = 5 V - guarantees fast, synchronized channel gating for burst-mode data transfer. |
Pinout & Package
SN74CBT16244CDGVR is housed in a 48-pin TVSOP (DGV) package with 0.4 mm lead pitch, 3.6 mm width, and 1.2 mm max height. The package supports fine-pitch PCB assembly and provides θJA = 58°C/W for thermal management in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output-enable inputs | Independently gate each 4-bit switch group; OE = low enables bidirectional A↔B conduction. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Port A input/output terminals | First side of each 4-bit switch; electrically identical to corresponding B pins-no directionality. |
| 1B1–1B4, 2B1–2B4, 3B1–3B4, 4B1–4B4 | Port B input/output terminals | Second side of each 4-bit switch; fully interchangeable with A-side pins for flexible routing. |
| VCC (Pins 7, 20, 33, 46) | Power supply | Four distributed VCC pins reduce IR drop and improve noise immunity across the 16-bit array. |
| GND (Pins 4, 11, 18, 25, 32, 39, 44) | Ground reference | Seven GND pins provide low-inductance return paths and support simultaneous switching noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional signal routing | No internal directionality-identical electrical behavior A→B and B→A eliminates routing constraints and simplifies PCB layout. |
| Low 5-Ω on-resistance | Minimizes insertion loss and voltage droop across all 16 channels, preserving TTL logic thresholds under 30-mA load. |
| TTL-compatible control inputs | VIH = 2.0 V min / VIL = 0.8 V max allows direct interfacing with legacy 5-V microcontrollers and FPGAs without level shifters. |
| Independent 4-bit enable control | Four separate OE pins allow granular power gating-e.g., isolate memory address vs. data buses independently. |
| High-speed 0.25-ns propagation | Enables use in >1-GHz clock domains and high-throughput parallel interfaces such as legacy PCI or VME backplanes. |
Applications
| Memory Bus Isolation | Backplane Signal Switching |
|---|---|
|
Use Scenario: Isolating DRAM address/data lines between CPU and memory controller during power-down sequences. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling/disabling signal paths without direction control logic or timing skew. Use Value: Prevents contention and leakage current during sleep modes while maintaining <0.35 ns channel delay for wake-up responsiveness. |
Use Scenario: Routing shared control signals across redundant backplane slots in telecom line cards. IC Role / Device Role / Timing Role: Low-capacitance, low-resistance signal bridge that preserves edge rate and timing margin across 16-bit control buses. Use Value: 4.5 pF off-capacitance and 5 Ω on-resistance minimize reflections and jitter accumulation over 15-cm trace lengths. |
| Legacy Interface Level Translation | Test Access Multiplexing |
|
Use Scenario: Interfacing 5-V TTL peripherals (e.g., ISA-bus devices) with modern 5-V microcontrollers lacking native 5-V I/O. IC Role / Device Role / Timing Role: Passive, non-inverting signal conduit with no DC bias or level-shifting circuitry required. Use Value: Eliminates need for discrete resistor networks or active translators-reduces BOM count and board area by 70% per 16-bit path. |
Use Scenario: Sharing JTAG or boundary-scan test access across multiple ASICs on a single PCB using multiplexed TDI/TDO lines. IC Role / Device Role / Timing Role: Electrically isolated channel selector enabling sequential test access without signal coupling. Use Value: 5.4 ns disable time ensures clean break-before-make switching, preventing test bus contention during reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16244DGGR | TSSOP-48 package; rated for –40°C to 85°C only; θJA = 70°C/W. | Suitable for commercial/industrial ambient conditions but not extended temperature deployments. | Select DGGR for cost-sensitive, non-military applications where full –55°C to 125°C range is unnecessary. |
| SN74CBT16244DLR | SSOP-48 package; same temperature range as DGVR (–40°C to 85°C); θJA = 63°C/W; larger footprint (5.3 mm width). | Better mechanical robustness and hand-solderability, but higher thermal resistance and board area usage. | Choose DLR when automated assembly is unavailable or when thermal derating above 70°C is acceptable. |
Compared with SN74CBT16244DGVR, the DGGR offers lower unit cost and smaller footprint but sacrifices extended temperature capability and thermal performance; the DLR trades size and thermal efficiency for easier prototyping and legacy board compatibility-neither is pin-compatible with DGVR due to differing package outlines and thermal pad configurations.
Availability
SN74CBT16244CDGVR is available at Aetrix Electronics and suitable for memory bus isolation, backplane signal routing, legacy interface bridging, and test access multiplexing requiring stable component supply across extended temperature ranges.
Supply support for SN74CBT16244CDGVR 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 specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in high-reliability components.
The SN74CBT16244CDGVR belongs to TI's Widebus™ family of high-speed bus switches, designed specifically for low-latency, bidirectional signal isolation in 5-V digital systems including industrial control, telecom infrastructure, and aerospace avionics.
FAQ
What is the maximum operating temperature range for SN74CBT16244CDGVR?
The SN74CBT16244CDGVR is specified for operation from –55°C to 125°C, making it suitable for extended industrial and military applications. This range exceeds the –40°C to 85°C rating of the DGG and DL package variants and is confirmed in the "recommended operating conditions" table of the SCDS031I datasheet.
Does SN74CBT16244CDGVR support 3.3-V logic levels?
No, SN74CBT16244CDGVR is not rated for 3.3-V operation. Its absolute maximum supply voltage is 7 V, but the recommended operating range is strictly 4 V to 5.5 V. Input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) are TTL-compatible and optimized for 5-V systems-not 3.3-V LVTTL or LVCMOS.
How many independent enable controls does SN74CBT16244CDGVR provide?
The SN74CBT16244CDGVR provides four independent active-low output-enable (OE) inputs-1OE, 2OE, 3OE, and 4OE-one for each 4-bit switch group. This allows selective activation of individual 4-bit segments without affecting others, enabling flexible bus partitioning in complex digital systems.
What is the on-state resistance specification for SN74CBT16244CDGVR?
The SN74CBT16244CDGVR has a typical on-state resistance (ron) of 5 Ω at VCC = 4.5 V, VI = 0 V, and II = 30 mA, with a maximum of 7 Ω under those conditions. This low resistance ensures minimal voltage drop and signal degradation across all 16 channels during bidirectional conduction.
Is SN74CBT16244CDGVR pin-compatible with other Widebus™ 16-bit switches?
Yes, SN74CBT16244CDGVR follows the standard '16244-type pinout defined in the Widebus™ family, matching pin-for-pin with SN74CBT16244DGGR and SN74CBT16244DLR in signal assignment-but not mechanical compatibility, as DGV (TVSOP), DGG (TSSOP), and DL (SSOP) packages have different footprints, thermal pads, and mounting requirements.
SN74CBT16244CDGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 48-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 4 x 1:1
- Independent Circuits:
- 4
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TVSOP
SN74CBT16244CDGVR FAQ
1.How can I place an order for SN74CBT16244CDGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT16244CDGVR 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 SN74CBT16244CDGVR reliable?
The price and inventory of SN74CBT16244CDGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT16244CDGVR is usually 5 days.
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Once your SN74CBT16244CDGVR 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 SN74CBT16244CDGVR?
For technical support, including SN74CBT16244CDGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT16244CDGVR requirements.
6.How does Aetrix verify that SN74CBT16244CDGVR is sourced from the original manufacturer or authorized distributors?
All SN74CBT16244CDGVR 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 SN74CBT16244CDGVR meets industry standards.
7.What is the process for return or replacement of SN74CBT16244CDGVR?
All SN74CBT16244CDGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16244CDGVR, 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 SN74CBT16244CDGVR part is unused and in its original packaging.
Return procedure for SN74CBT16244CDGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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