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Texas Instruments SN74CBTLV3253PWR
- Part No.:
- SN74CBTLV3253PWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBTLV3253PWR.pdf
- Description:
- IC MUX/DEMUX 2 X 4:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,828
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Product details
Overview
SN74CBTLV3253PWR from Texas Instruments is a low-voltage dual 1-of-4 FET multiplexer/demultiplexer in TSSOP-16 package, featuring 5Ω typical ON-state resistance, rail-to-rail switching on I/O ports, and Ioff support for partial-power-down operation. It enables high-speed signal routing in 2-channel, 4:1 configurations for enterprise computing and wired networking systems.
For engineers reviewing the SN74CBTLV3253PWR datasheet, SN74CBTLV3253PWR pinout, SN74CBTLV3253PWR application, or SN74CBTLV3253PWR equivalent, key selection criteria include guaranteed 5Ω ron at 3.3V/64mA, −40°C to 85°C operating range, active-low OE control per channel, and compatibility with 2.3V–3.6V supply rails.
Technical Context
The SN74CBTLV3253PWR implements two independent 1-of-4 analog switches using low-threshold FETs, each controlled by S0/S1 select lines and individual active-low OE inputs. Its architecture supports bidirectional signal flow with minimal propagation delay (≤0.25 ns at 3.3V) and maintains high-impedance isolation when disabled.
It integrates Ioff protection to block current backflow during partial power-down, meets JESD78 Class II latch-up immunity (>100 mA), and tolerates I/O voltages up to 4.6V regardless of VCC level-enabling safe interfacing with mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON-state resistance (ron) | 5 Ω typical at VCC = 3.3V, 64mA - ensures minimal voltage drop and signal attenuation in high-speed data paths |
| Supply voltage range | 2.3V to 3.6V - compatible with modern low-voltage logic families including LVT and AVC |
| Propagation delay (tpd) | 0.15–0.25 ns at VCC = 3.3V - enables sub-nanosecond switching for DDR, PCIe, and high-frequency bus applications |
| Ioff current | 15 µA max at VCC = 0V - prevents damaging back-current during hot-swap or partial-power-down sequences |
| ESD rating (HBM) | ±2000 V - provides robust handling margin in automated assembly and field-replaceable module environments |
| Operating temperature | −40°C to +85°C - validated for industrial-grade deployment in datacenter and networking equipment |
| Input capacitance (Ci) | 3 pF - minimizes loading on driving sources and preserves signal integrity in high-impedance interfaces |
Pinout & Package
TSSOP-16 package (5.00 mm × 4.40 mm), thermally enhanced with exposed pad option not present in PW variant; RoHS-compliant, NIPDAU lead finish, MSL Level-1 (260°C, unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low enable for Channel 1 | Drives all four B1–B4 switches of first multiplexer; high = open-circuit isolation |
| S1, S0 | Binary select inputs for both channels | Set 1-of-4 path selection (00→B1, 01→B2, 10→B3, 11→B4); shared across both A ports |
| 1A, 2A | Common input/output terminals | Bidirectional signal hubs - connect to system buses or processors; tolerate 0–4.6V swing |
| 1B1–1B4, 2B1–2B4 | Channel-specific I/O terminals | Four independent switched paths per channel; each rated for ±128mA continuous current |
| VCC | Power supply | Single 2.3–3.6V rail powers logic and switch FETs; bypass capacitor required at pin |
| GND | Reference ground | Return path for all signals and supply current; must be low-impedance for noise control |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O switching | Supports full 0V to VCC signal swing on all ports - eliminates level-shifting in mixed-supply systems |
| Functional equivalence to QS3253 | Drop-in replacement for legacy designs using QS3253 - same pinout, timing, and electrical behavior |
| Partial-power-down support (Ioff) | Blocks current flow between powered and unpowered domains - critical for hot-plug and modular backplane architectures |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II - ensures reliability in noisy industrial and telecom environments |
| Low ON-resistance flatness | ron variation < 3Ω across 0–3.3V input range - preserves amplitude fidelity in analog and digital signal routing |
Applications
| Enterprise Server Backplanes | Data Center Network Switches |
|---|---|
Use Scenario: Routing PCIe Gen4/Gen5 control signals and sideband buses between CPU, PLX switches, and NIC modules across multi-slot backplanes. IC Role / Device Role / Timing Role: Dual 4:1 analog switch enabling dynamic reconfiguration of SMBus, JTAG, and CLKREQ# lines without interrupting host operation. Use Value: 5Ω ron and sub-0.3ns tpd maintain signal integrity at >8 GT/s; Ioff prevents backfeed during hot-swap of line cards. | Use Scenario: Selecting between redundant PHYs or media interfaces (SFP+, QSFP-DD) in top-of-rack switches with shared MAC controllers. IC Role / Device Role / Timing Role: Bidirectional signal router for MDIO, RGMII, and SGMII lanes - managed via FPGA GPIOs driving S0/S1 and OE pins. Use Value: Rail-to-rail I/O supports 1.8V/3.3V PHY voltage domains; 2.3–3.6V VCC range aligns with switch ASIC core voltage rails. |
| Industrial Ethernet Gateways | Video Broadcast IP Transcoders |
Use Scenario: Multiplexing RS-485, CAN FD, and EtherCAT diagnostics lines onto a single MCU UART interface in programmable logic controllers. IC Role / Device Role / Timing Role: Low-latency analog switch isolating communication channels during firmware updates or fault recovery sequences. Use Value: −40°C to 85°C rating ensures operation in uncontrolled cabinet environments; 4.6V I/O tolerance accommodates transient surges on field wiring. | Use Scenario: Dynamically assigning HDMI, SDI, and MIPI CSI-2 video streams to encode/decode ASICs in multi-format broadcast transcoders. IC Role / Device Role / Timing Role: High-fidelity signal path selector preserving edge rates and jitter performance for uncompressed video transport. Use Value: 3pF Ci and 5Ω ron minimize rise-time degradation; TSSOP-16 footprint allows dense placement near high-speed connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3253PW | Same die, identical electrical specs, obsolete status - no new production, limited remaining stock | No functional difference; identical pinout and thermal profile | Select SN74CBTLV3253PWR for assured long-term supply and TI's current production support |
| QS3253QG | Functionally equivalent per TI documentation; 5Ω ron, same 16-pin SOIC package but larger footprint (9.9 × 3.9 mm) | SOIC-16 requires more PCB area; lacks TSSOP's thermal advantage in compact layouts | Choose QS3253QG only if legacy SOIC layout reuse is mandatory and space constraints allow |
Compared with SN74CBTLV3253PW (obsolete) and QS3253QG (SOIC), SN74CBTLV3253PWR delivers identical switching performance in a smaller, thermally superior TSSOP package with active production status - making it the optimal choice for new designs requiring supply continuity and board-area efficiency.
Availability
SN74CBTLV3253PWR is available at Aetrix Electronics and suitable for enterprise server backplanes, data center network switches, and industrial Ethernet gateways requiring stable component supply across extended product lifecycles.
Supply support for SN74CBTLV3253PWR 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 solutions, with over 90 years of innovation in high-reliability components.
The SN74CBTLV3253 belongs to TI's CBTLV (Crossbar Low-Voltage) logic family, designed specifically for high-speed, low-distortion signal routing in next-generation computing and communications infrastructure.
FAQ
What is the maximum allowable I/O voltage for SN74CBTLV3253PWR when VCC = 0V?
The SN74CBTLV3253PWR supports I/O voltages from −0.5V to 4.6V regardless of VCC state. This overvoltage tolerance enables safe connection to live buses during power sequencing or partial power-down, and is explicitly specified in Section 5.1 Absolute Maximum Ratings of the datasheet.
Does SN74CBTLV3253PWR support hot-swap operation, and how is it implemented?
Yes, SN74CBTLV3253PWR supports hot-swap via its Ioff feature: when VCC = 0V, leakage current is limited to 15 µA max, preventing damaging back-current from live I/O traces into unpowered circuitry. This capability is validated per JESD78 Class II latch-up testing and is integral to its use in modular datacenter hardware.
What is the recommended bypass capacitor for SN74CBTLV3253PWR, and where should it be placed?
A 0.1µF ceramic capacitor is recommended for SN74CBTLV3253PWR, placed as close as possible to the VCC pin (Pin 16) and GND (Pin 8). This placement minimizes high-frequency impedance and suppresses supply noise that could degrade switching performance or cause false triggering of internal logic.
How does the SN74CBTLV3253PWR handle simultaneous switching of both channels?
The SN74CBTLV3253PWR uses shared S0/S1 select lines but independent 1OE and 2OE enables, allowing fully asynchronous control of each 1-of-4 switch. Both channels operate concurrently with identical timing (tpd ≤ 0.25 ns), and crosstalk between channels is suppressed by design to < −50 dB per characterization data.
Is SN74CBTLV3253PWR pin-compatible with older TI multiplexers like SN74CBT3253?
No - SN74CBTLV3253PWR is not pin-compatible with SN74CBT3253. While functionally similar, SN74CBT3253 uses different pin assignments (e.g., OE pins located at Pins 1 and 15 vs. Pins 1 and 15 in SN74CBTLV3253PWR), and operates at higher VCC (4.5–5.5V). Direct substitution would require PCB redesign.
SN74CBTLV3253PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 2 x 4:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74CBTLV3253PWR FAQ
1.How can I place an order for SN74CBTLV3253PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTLV3253PWR 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 SN74CBTLV3253PWR reliable?
The price and inventory of SN74CBTLV3253PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTLV3253PWR is usually 5 days.
3.What payment methods are accepted for SN74CBTLV3253PWR?
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4.How is shipping managed for SN74CBTLV3253PWR?
SN74CBTLV3253PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTLV3253PWR 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 SN74CBTLV3253PWR?
For technical support, including SN74CBTLV3253PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTLV3253PWR requirements.
6.How does Aetrix verify that SN74CBTLV3253PWR is sourced from the original manufacturer or authorized distributors?
All SN74CBTLV3253PWR 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 SN74CBTLV3253PWR meets industry standards.
7.What is the process for return or replacement of SN74CBTLV3253PWR?
All SN74CBTLV3253PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTLV3253PWR, 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 SN74CBTLV3253PWR part is unused and in its original packaging.
Return procedure for SN74CBTLV3253PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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