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Texas Instruments SN74CBT16214CDLRG4
- Part No.:
- SN74CBT16214CDLRG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74CBT16214CDLRG4.pdf
- Description:
- IC MUX/DEMUX 12 X 1:3 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,854
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Product details
Overview
SN74CBT16214CDLRG4 from Texas Instruments is a 12-bit, 1-of-3 bidirectional FET multiplexer/demultiplexer with 3 Ω typical ON-state resistance, near-zero propagation delay (0.15 ns at VCC = 5 V), and −2 V undershoot protection on A/B ports. It operates from 4 V to 5.5 V and supports mixed-voltage signaling (0.8 V to 5 V) across PCI interface and bus isolation applications.
For engineers reviewing the SN74CBT16214CDLRG4 datasheet, SN74CBT16214CDLRG4 pinout, SN74CBT16214CDLRG4 application, or SN74CBT16214CDLRG4 equivalent, key selection criteria include Ioff-enabled partial-power-down operation, 5.5 pF typical OFF-state B-port capacitance, 12-bit 3-channel switching architecture, and SSOP-56 package compatibility with industrial temperature range (−40°C to 85°C).
Technical Context
This device implements twelve independent 1-of-3 analog/digital switches controlled by three select lines (S0–S2), enabling bidirectional signal routing between one A port and three B subports (B1/B2/B3) per channel. Each switch features active undershoot-protection circuitry that maintains OFF-state integrity during −2 V transients.
It uses TTL-compatible control inputs (VIH = 2 V min, VIL = 0.8 V max) and supports Ioff isolation when VCC = 0 V, preventing backflow current up to ±128 mA per switch path. The internal enable logic ensures high-impedance state during power sequencing when select lines are pulled to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON-state resistance (ron) | 3 Ω typical - minimizes voltage drop and power loss in signal paths carrying up to ±128 mA. |
| Propagation delay (tpd) | 0.15 ns at VCC = 5 V - enables high-speed data gating without timing skew in PCI and memory bus applications. |
| B-port OFF capacitance (Cio(OFF)) | 5.5 pF typical - reduces capacitive loading and preserves signal integrity in high-frequency digital routing. |
| Supply voltage range (VCC) | 4 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of supply droop during transient conditions. |
| Undershoot protection | −2 V on A/B ports - prevents false turn-on and latch-up during negative transients in hot-swap or cable-disconnect scenarios. |
| Ioff current | 10 µA max at VCC = 0 V - ensures robust isolation during partial power-down, protecting powered sections from unpowered buses. |
| Operating temperature | −40°C to 85°C - qualified for industrial-grade embedded systems and communications infrastructure equipment. |
Pinout & Package
SN74CBT16214CDLRG4 is packaged in a 56-pin SSOP (DL) with 0.5 mm pitch, 13.9 mm × 7.9 mm body size, and 1.2 mm max height. Pin 1 is marked in quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A–12A | A-side data input/output | Twelve unidirectional A-port terminals; each connects bidirectionally to one of three B-subports per channel. |
| 1B1–12B1, 1B2–12B2, 1B3–12B3 | B-subport data I/O | Three sets of twelve B-port terminals; S0/S1/S2 determine which set connects to corresponding A port. |
| S0, S1, S2 | Select control inputs | 3-bit binary address selecting active B-subport group (B1/B2/B3); floating inputs must be pulled to GND for safe power-up. |
| VCC | Power supply | Single 4–5.5 V rail powering all switch channels and control logic; decoupling required within 10 mm. |
| GND (Pins 8, 17, 37, 46) | Ground reference | Four dedicated ground pins minimize ground bounce and ensure stable switch threshold referencing. |
Key Features
| Feature | Design Value |
|---|---|
| Undershoot protection | Active sensing circuitry holds switch OFF during −2 V transients on A/B ports, eliminating need for external clamping diodes. |
| Bidirectional low-distortion switching | 3 Ω ron and 5.5 pF Cio(OFF) preserve signal edge rate and amplitude across 0–5 V logic families including 1.8 V and 3.3 V interfaces. |
| Ioff partial-power-down support | 10 µA max leakage at VCC = 0 V prevents backdrive current into unpowered subsystems, enabling live insertion in modular backplanes. |
| Mixed-voltage I/O compatibility | Data I/Os tolerate 0–5.5 V signals regardless of VCC level, allowing seamless interfacing between 0.8 V ASICs and 5 V legacy peripherals. |
| TTL/CMOS control compatibility | Control inputs accept 2 V min VIH and 0.8 V max VIL, enabling direct drive from 3.3 V or 5 V microcontrollers without level shifters. |
Applications
| PCI Bus Isolation | Hot-Swappable Module Interface |
|---|---|
Use Scenario: Isolating PCI add-in cards from motherboard during insertion/removal to prevent bus contention and voltage glitches. IC Role / Device Role / Timing Role: Bidirectional 12-bit 1-of-3 switch isolates data/address lines while maintaining signal integrity across hot-plug transitions. Use Value: −2 V undershoot protection prevents false switching during connector mating; Ioff blocks backfeed current when card is unpowered. | Use Scenario: Enabling live replacement of field-replaceable units (FRUs) in telecom line cards without system reset. IC Role / Device Role / Timing Role: Multiplexer routes control and status signals between baseboard controller and FRU, with select lines managed by CPLD/FPGA. Use Value: Near-zero propagation delay (0.15 ns) avoids timing violations in 33 MHz PCI-X domains; 3 Ω ron limits voltage drop under 64 mA load. |
| Multi-Voltage Memory Subsystem | Legacy-to-Modern Interface Bridge |
Use Scenario: Interfacing 1.8 V DDR2 memory controllers with 3.3 V configuration EEPROMs and 5 V power-monitoring ICs. IC Role / Device Role / Timing Role: Level-agnostic signal gate passes SCL/SDA, chip-select, and reset signals between voltage domains without translation logic. Use Value: 0–5.5 V I/O tolerance eliminates external level shifters; 5.5 pF Cio(OFF) prevents crosstalk between adjacent memory channels. | Use Scenario: Connecting modern 3.3 V FPGA I/O banks to legacy 5 V parallel bus peripherals (e.g., printers, industrial PLCs). IC Role / Device Role / Timing Role: Bidirectional multiplexer selects between multiple 5 V peripheral data paths while preserving setup/hold timing margins. Use Value: 3 Ω ron ensures <10 mV drop at 30 mA drive; TTL-compatible controls simplify integration with existing 5 V glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET multiplexer/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16214CDGGR | TSSOP-56 package (vs. SSOP-56); identical electrical specs and pinout; 24.4 mm reel width vs. 32.4 mm. | Preferred for space-constrained PCBs where 1.2 mm height and smaller footprint are critical. | Select SN74CBT16214CDGGR when board area is limited and reflow profile supports TSSOP; same functionality and timing. |
| SN74CBT3245ADLR | 8-bit dual-supply bus switch (VCCA/VCCB); no select logic; ron = 5 Ω typical; lacks undershoot protection. | Suitable only for fixed-path isolation, not 1-of-3 dynamic routing; requires separate level-shifting for mixed-voltage use. | Choose SN74CBT3245ADLR only for simpler 8-bit point-to-point isolation without select control or −2 V transient immunity. |
Compared with SN74CBT16214CDGGR, SN74CBT16214CDLRG4 offers identical switching performance but in a wider SSOP package better suited for manual assembly and thermal dissipation; versus SN74CBT3245ADLR, it provides programmable 12-bit 1-of-3 routing and certified −2 V undershoot resilience essential for PCI-compliant systems.
Availability
SN74CBT16214CDLRG4 is available at Aetrix Electronics and suitable for PCI interface design, industrial hot-swap modules, and multi-voltage memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74CBT16214CDLRG4 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 SN74CBT16214CDLRG4 belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for low-distortion, bidirectional signal routing in PCI, memory, and mixed-voltage system interconnects.
FAQ
What is the maximum undershoot voltage the SN74CBT16214CDLRG4 can withstand on its A and B ports?
The SN74CBT16214CDLRG4 provides active undershoot protection rated to −2 V on both A and B ports. This is verified per test conditions in the datasheet (VCC = 5.5 V, switch OFF), where the internal protection circuit senses the transient and forces the switch into a guaranteed OFF state to prevent false conduction or latch-up. This capability is intrinsic to the SN74CBT16214CDLRG4 design and does not require external components.
Does the SN74CBT16214CDLRG4 support partial-power-down operation, and how is it implemented?
Yes, the SN74CBT16214CDLRG4 supports partial-power-down via its Ioff feature. When VCC = 0 V, the device limits backflow current to ≤10 µA per I/O terminal, preventing damage to powered sections of the system. This behavior is inherent to the SN74CBT16214CDLRG4's FET architecture and is specified across the full operating temperature range (−40°C to 85°C), making it suitable for hot-plug applications where subsystems power up/down independently.
What is the ON-state resistance (ron) specification for the SN74CBT16214CDLRG4, and how does it affect signal integrity?
The SN74CBT16214CDLRG4 has a typical ON-state resistance of 3 Ω at VCC = 4.5 V and IO = 30 mA. This low ron minimizes voltage drop (e.g., <90 mV at 30 mA), preserves signal swing, and reduces power dissipation in high-speed data paths. Measured per datasheet methodology using the lower of A/B terminal voltages, this value is consistent across all 12 channels and directly contributes to the SN74CBT16214CDLRG4's suitability for PCI and memory bus isolation.
Can the SN74CBT16214CDLRG4 interface between different logic voltage levels such as 1.8 V and 5 V?
Yes, the SN74CBT16214CDLRG4 supports 0–5.5 V signaling on its data I/Os independent of VCC, enabling direct connection between 1.8 V, 2.5 V, 3.3 V, and 5 V devices. Its control inputs are TTL-compatible (VIH ≥ 2 V, VIL ≤ 0.8 V), so they can be driven by either 3.3 V or 5 V logic without level shifting. This dual-domain capability is a core functional attribute of the SN74CBT16214CDLRG4 and is validated across the full temperature range.
What package type and pin count does the SN74CBT16214CDLRG4 use, and is it RoHS compliant?
The SN74CBT16214CDLRG4 uses a 56-pin SSOP (DL) package with 0.5 mm pitch, 13.9 mm × 7.9 mm body dimensions, and 1.2 mm max height. It is RoHS compliant (lead-free NiPdAu finish) and rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH). This package matches the pinout and footprint of SN74CBT16214CDL and SN74CBT16214CDLR variants, ensuring interchangeability in existing designs.
SN74CBT16214CDLRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 12 x 1:3
- Independent Circuits:
- 1
- 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:
- 56-SSOP
SN74CBT16214CDLRG4 FAQ
1.How can I place an order for SN74CBT16214CDLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT16214CDLRG4 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 SN74CBT16214CDLRG4 reliable?
The price and inventory of SN74CBT16214CDLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT16214CDLRG4 is usually 5 days.
3.What payment methods are accepted for SN74CBT16214CDLRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBT16214CDLRG4 transactions.
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4.How is shipping managed for SN74CBT16214CDLRG4?
SN74CBT16214CDLRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBT16214CDLRG4 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 SN74CBT16214CDLRG4?
For technical support, including SN74CBT16214CDLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT16214CDLRG4 requirements.
6.How does Aetrix verify that SN74CBT16214CDLRG4 is sourced from the original manufacturer or authorized distributors?
All SN74CBT16214CDLRG4 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 SN74CBT16214CDLRG4 meets industry standards.
7.What is the process for return or replacement of SN74CBT16214CDLRG4?
All SN74CBT16214CDLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16214CDLRG4, 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 SN74CBT16214CDLRG4 part is unused and in its original packaging.
Return procedure for SN74CBT16214CDLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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