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Texas Instruments SN74CBT16210DL
- Part No.:
- SN74CBT16210DL
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74CBT16210DL.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,583
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Product details
Overview
SN74CBT16210DL from Texas Instruments is a 20-bit FET bus switch in SSOP-48 package, featuring 5 Ω typical on-state resistance, TTL-compatible control inputs (VIH = 2 V, VIL = 0.8 V), and dual 10-bit independent switching with separate OE pins. It enables high-speed, low-propagation-delay interconnects in memory expansion and data-path isolation applications.
For engineers reviewing the SN74CBT16210DL datasheet, SN74CBT16210DL pinout, SN74CBT16210DL application, or SN74CBT16210DL equivalent, key selection criteria include its 5 Ω ron, 0.25 ns typical propagation delay at 5 V, ±1 µA input leakage, 4–5.5 V supply range, and dual-OE-controlled 20-bit bidirectional switching capability.
Technical Context
The SN74CBT16210DL implements two independent 10-bit FET-based transmission gates, each controlled by a dedicated OE input. Its CMOS-compatible control logic drives N-channel pass transistors with no internal level-shifting circuitry.
Each switch exhibits symmetrical A↔B conduction with minimal voltage drop (ron ≤ 7 Ω at 30 mA), supports bidirectional signal flow without direction control, and maintains high-impedance isolation when OE is high - enabling hot-swap and power-domain isolation use cases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5 Ω typical at VCC = 4.5 V, ensuring <150 mV voltage drop at 30 mA for clean signal integrity |
| Propagation delay (tpd) | 0.25 ns typical at VCC = 5 V, CL = 50 pF - enables sub-nanosecond interconnect timing |
| Supply voltage (VCC) | 4 V to 5.5 V - compatible with 5 V TTL and mixed-voltage system backplanes |
| Control input thresholds | VIH = 2 V min, VIL = 0.8 V max - fully TTL-compatible with legacy logic families |
| Input leakage current | ±1 µA max at VCC = 5.5 V - negligible loading on upstream drivers |
| Off-state capacitance (Cio) | 5.5 pF max - minimizes capacitive crosstalk and signal degradation in high-speed buses |
| Operating temperature | –40°C to +85°C - qualified for industrial-grade embedded and telecom equipment |
Pinout & Package
SN74CBT16210DL uses a 48-pin SSOP (DL) package with 0.5 mm pitch, 12.4 mm × 6.1 mm body size, and 1.2 mm max height per JEDEC MO-153. Pin 1 is located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A10, 2A1–2A10 | Port A inputs/outputs (first/second 10-bit group) | Unidirectional signal terminals tied to one side of respective 10-bit switch array |
| 1B1–1B10, 2B1–2B10 | Port B inputs/outputs (first/second 10-bit group) | Unidirectional signal terminals tied to opposite side of respective 10-bit switch array |
| 1OE, 2OE | Output-enable controls (active-low) | Independent enable for each 10-bit section - low = connect A↔B, high = high-Z isolation |
| VCC | Positive supply | Single 4–5.5 V rail powers all 20 switches and control logic |
| GND (pins 8, 17, 35, 46) | Ground reference | Four dedicated ground pins reduce switching noise and improve PSRR |
| NC (pins 1, 48) | No internal connection | Reserved positions - must remain unconnected per TI design |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance | 5 Ω typical ensures minimal insertion loss and preserves signal amplitude across 20-bit paths |
| Dual independent OE control | Enables selective isolation of two 10-bit domains - e.g., isolate CPU address bus from peripheral I/O bus |
| TTL-compatible inputs | Eliminates need for level translators when interfacing with 74LS/74ALS logic or microcontroller GPIO |
| Bidirectional signal flow | No direction pin required - signals propagate equally well A→B or B→A within same switch path |
| High off-isolation | 5.5 pF Cio(OFF) and >10⁹ Ω off-resistance prevent coupling between powered and unpowered subsystems |
Applications
| Memory Expansion Interface | PCI/ISA Bus Isolation |
|---|---|
|
Use Scenario: Expanding DRAM capacity in legacy x86 systems using multiple SIMM banks sharing a common data bus. IC Role / Device Role / Timing Role: SN74CBT16210DL acts as a 20-bit bidirectional bus switch isolating inactive memory banks to prevent contention and signal loading. Use Value: Enables zero-wait-state memory access with <0.3 ns added delay and eliminates need for tristate buffers or complex bus arbitration. |
Use Scenario: Segregating PCI add-in card signals from motherboard ISA bus during hot-plug or configuration changes. IC Role / Device Role / Timing Role: SN74CBT16210DL provides galvanic isolation between legacy ISA peripherals and PCI-exposed I/O lines via dual-OE control. Use Value: Prevents back-driving and latch-up during card insertion/removal while maintaining full 20-bit data/address throughput. |
| Microcontroller Peripheral Multiplexing | Test Access Port (TAP) Signal Routing |
|
Use Scenario: Sharing a single 20-bit parallel interface between LCD controller and flash memory on an ARM9-based HMI board. IC Role / Device Role / Timing Role: SN74CBT16210DL serves as a software-controllable 20-bit mux, routing signals based on active peripheral state. Use Value: Reduces PCB layer count by eliminating duplicate traces and allows dynamic reconfiguration without hardware changes. |
Use Scenario: Routing JTAG TDI/TDO/TCK/TMS signals between multiple ASICs on a high-density test board. IC Role / Device Role / Timing Role: SN74CBT16210DL functions as a low-capacitance, low-delay signal router for boundary-scan chain segmentation. Use Value: Maintains IEEE 1149.1 timing margins with <0.25 ns added skew and prevents signal integrity degradation across daisy-chained devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD16210DGGR | Includes bus-hold circuitry and higher drive strength; 6 Ω ron; TSSOP-48 package | Required where unused inputs must be held stable without external pull-ups | Choose SN74CBTD16210DGGR only if bus-hold functionality is needed; otherwise SN74CBT16210DL offers lower cost and identical switching performance |
| 74FST16210MTD | Fairchild part with 6.5 Ω ron, 0.3 ns tpd, same pinout but different thermal resistance (70°C/W vs 63°C/W) | Valid for drop-in replacement in existing DL-package layouts but requires validation of thermal margin at 85°C ambient | Select 74FST16210MTD only when TI supply continuity is constrained; verify junction temperature rise under worst-case load conditions |
Compared with SN74CBT16210DL, SN74CBTD16210DGGR adds bus-hold but increases package cost and power; 74FST16210MTD matches pinout and function but has higher thermal impedance - making SN74CBT16210DL optimal for cost-sensitive, thermally unconstrained 5 V bus-switching designs.
Availability
SN74CBT16210DL is available at Aetrix Electronics and suitable for memory expansion interfaces, PCI/ISA bus isolation, microcontroller peripheral multiplexing, and JTAG signal routing requiring stable component supply across industrial and embedded production cycles.
Supply support for SN74CBT16210DL 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 connectivity solutions for industrial, automotive, and communications markets.
The SN74CBT16210DL belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for low-latency, low-distortion signal routing in 5 V digital systems with strict timing budgets.
FAQ
What is the maximum continuous current rating per channel for SN74CBT16210DL?
The SN74CBT16210DL supports up to 128 mA continuous channel current per switch path, as specified in its absolute maximum ratings. This rating applies across the full operating temperature range (–40°C to +85°C) and ensures reliable conduction without thermal runaway when used within recommended VCC and load conditions. The device's 5 Ω typical on-resistance keeps self-heating well within safe limits at this current level.
Does SN74CBT16210DL support hot-swap operation?
Yes, SN74CBT16210DL supports hot-swap operation due to its high-impedance off-state (≥10⁹ Ω), low off-capacitance (5.5 pF), and rail-to-rail input tolerance (–0.5 V to 7 V). When OE is high, the switch presents near-ideal isolation between ports, preventing back-powering or signal injection into live subsystems - a key requirement for hot-pluggable modules using the SN74CBT16210DL.
Can SN74CBT16210DL operate with a 3.3 V supply?
No, SN74CBT16210DL is not rated for 3.3 V operation. Its recommended VCC range is 4 V to 5.5 V, and the absolute minimum supply is 4 V. At 3.3 V, the device fails to meet VIH/VIL thresholds (2 V/0.8 V), resulting in undefined control behavior and degraded ron performance. For 3.3 V systems, consider TI's SN74CB3Q16210 or similar 3.3 V–optimized bus switches instead of SN74CBT16210DL.
How many ground pins does SN74CBT16210DL have, and why are they distributed?
SN74CBT16210DL has four dedicated ground pins (pins 8, 17, 35, and 46) placed symmetrically across the SSOP-48 package. This distribution minimizes ground loop inductance and reduces simultaneous switching noise (SSN) by providing low-impedance return paths for all 20 switch channels. TI's layout guidance confirms that using all four GND pins is mandatory to achieve specified tpd and noise immunity in the SN74CBT16210DL.
Is SN74CBT16210DL pin-compatible with SN74CBT16210DGGR or SN74CBT16210DGVR?
Yes, SN74CBT16210DL is pin-compatible with SN74CBT16210DGGR (TSSOP-48) and SN74CBT16210DGVR (TVSOP-48): all share identical 48-pin functional mapping, pin numbering, and signal assignments per TI's package drawings. However, mechanical dimensions differ - DL is wider (12.4 mm) than DGG (7.9 mm) and DGV (6.2 mm) - so PCB land patterns are not interchangeable despite electrical pin compatibility in the SN74CBT16210DL family.
SN74CBT16210DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 10 x 1:1
- Independent Circuits:
- 2
- 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-SSOP
SN74CBT16210DL FAQ
1.How can I place an order for SN74CBT16210DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT16210DL 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 SN74CBT16210DL reliable?
The price and inventory of SN74CBT16210DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT16210DL is usually 5 days.
3.What payment methods are accepted for SN74CBT16210DL?
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4.How is shipping managed for SN74CBT16210DL?
SN74CBT16210DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBT16210DL 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 SN74CBT16210DL?
For technical support, including SN74CBT16210DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT16210DL requirements.
6.How does Aetrix verify that SN74CBT16210DL is sourced from the original manufacturer or authorized distributors?
All SN74CBT16210DL 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 SN74CBT16210DL meets industry standards.
7.What is the process for return or replacement of SN74CBT16210DL?
All SN74CBT16210DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16210DL, 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 SN74CBT16210DL part is unused and in its original packaging.
Return procedure for SN74CBT16210DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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