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Texas Instruments SN74CB3T3253PWR
- Part No.:
- SN74CB3T3253PWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CB3T3253PWR.pdf
- Description:
- IC MUX/DEMUX 2 X 4:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,710
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Product details
Overview
SN74CB3T3253PWR from Texas Instruments is a dual 1-of-4 FET multiplexer/demultiplexer with 5V-tolerant I/Os, 2.3V–3.6V VCC operation, 5Ω typical ON-state resistance, bidirectional signal flow, and Ioff partial-power-down support. It enables level translation between 5V, 3.3V, and 2.5V domains in USB interface and memory interleaving applications.
For engineers reviewing the SN74CB3T3253PWR datasheet, SN74CB3T3253PWR pinout, SN74CB3T3253PWR application, or SN74CB3T3253PWR equivalent, key selection criteria include mixed-mode voltage translation capability, 5V tolerance with 2.5V/3.3V supply, low propagation delay (≤0.25 ns), Ioff isolation during power-down, and TSSOP-16 package compatibility with high-density PCB layouts.
Technical Context
The SN74CB3T3253PWR implements two independent 1-of-4 analog switches controlled by active-low OE and 2-bit S1/S0 select inputs. Each switch supports rail-to-rail bidirectional data flow with VCC-tracked output voltage translation - e.g., 5V input to 3.3V output at 3.3V VCC, or 5V/3.3V input to 2.5V output at 2.5V VCC.
It features undershoot clamp diodes on all I/O and control pins, 5pF typical OFF-state I/O capacitance, 20μA max ICC, and JESD17 latch-up immunity (>250mA). The device maintains high-impedance isolation when powered down via Ioff, preventing backflow current and enabling hot-swap capability in mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - Enables operation across 2.5V and 3.3V logic domains without external level shifters. |
| rON (Typ) | 5Ω - Minimizes insertion loss and signal distortion in high-speed digital buses up to 100+ MHz. |
| I/O Voltage Range | 0V to 5.5V - Supports 5V-tolerant signaling regardless of VCC state, including during power-up/down sequences. |
| tpd (Max) | 0.25 ns at 3.3V - Near-zero propagation delay preserves timing integrity in DDR, USB, and memory bus switching. |
| Cio(OFF) (Typ) | 5pF - Reduces capacitive loading on source and destination buses, critical for maintaining signal rise/fall times. |
| Ioff Leakage | ±10 μA - Ensures robust channel isolation during partial power-down, preventing unintended current paths. |
| ESD Rating (HBM) | ±2000 V - Meets Class II ESD robustness for handling in standard manufacturing environments. |
Pinout & Package
TSSOP-16 (PW) package: 5mm × 6.4mm body, 0.65mm pitch, surface-mount, RoHS-compliant, MSL Level-1 (260°C, unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low enable inputs | Independently activate each 1-of-4 mux; tied high via pullup for power-up high-Z safety. |
| S1, S0 | 2-bit binary select inputs | Determine which of four B-port channels connects to A port (L/L = B1, H/H = B4). |
| 1A, 2A | Common I/O ports (Channel 1 & 2) | Bidirectional data path hubs; connect to system bus or controller interface. |
| 1B1–1B4, 2B1–2B4 | Individual I/O channels | Four selectable endpoints per mux; support mixed-voltage routing (e.g., 5V sensor → 3.3V MCU). |
| VCC | Supply pin | Power source for internal FET gate drive; sets translation reference and rON performance. |
| GND | Ground reference | Return path for all I/O and control signals; must be low-inductance for noise-sensitive switching. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage translation tracking VCC | Enables seamless 5V→3.3V or 5V/3.3V→2.5V level shifting without external components or direction control. |
| 5V-tolerant I/Os (powered/unpowered) | Allows safe connection to 5V buses even when VCC = 0V, supporting hot-plug and partial-power-down architectures. |
| Ioff partial-power-down protection | Blocks damaging back-current flow during VCC ramp-down, eliminating need for external isolation circuitry. |
| Low Cio(OFF) = 5pF | Minimizes capacitive loading on inactive channels, preserving signal integrity in multi-drop or high-frequency buses. |
| Undershoot clamp diodes | Protects internal FET gates from negative transients down to –1.2V, enhancing reliability in noisy industrial environments. |
Applications
| USB Interface Switching | Memory Interleaving |
|---|---|
|
Use Scenario: Selecting between two USB peripheral controllers sharing a single USB PHY or connector. IC Role / Device Role / Timing Role: Bidirectional 1-of-4 analog switch enabling dynamic USB path routing with sub-nanosecond delay. Use Value: Eliminates need for discrete MOSFET arrays or dedicated USB switches while maintaining full 480 Mbps signal fidelity. |
Use Scenario: Routing address/data lines between two memory banks (e.g., SRAM and Flash) in a microcontroller subsystem. IC Role / Device Role / Timing Role: Dual-channel bus multiplexer providing glitch-free memory bank selection under software control. Use Value: Reduces PCB layer count and routing complexity versus discrete solutions, with no added setup/hold timing penalties. |
| Level Translation Bridge | Bus Isolation |
|
Use Scenario: Interfacing a 5V legacy sensor to a 3.3V or 2.5V host MCU in industrial IoT edge nodes. IC Role / Device Role / Timing Role: Voltage-translating FET switch translating logic levels while preserving signal polarity and timing. Use Value: Achieves drop-in compatibility without pull-up resistors, level shifter ICs, or voltage dividers - reducing BOM cost and layout area. |
Use Scenario: Isolating debug/test interfaces (e.g., JTAG or SWD) from main system power domains during firmware updates. IC Role / Device Role / Timing Role: High-impedance switch disabling signal paths during VCC ramp-up or brownout conditions. Use Value: Prevents backfeeding and bus contention during power sequencing, improving system boot reliability and test repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET multiplexer/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3253PWR | Higher rON (7Ω typ), no Ioff support, 4.5V–5.5V VCC only - lacks mixed-voltage translation and partial-power-down capability. | Restricted to 5V-only systems; unsuitable for 2.5V/3.3V domains or hot-swap use cases. | Select only if operating exclusively at 5V and Ioff is not required; otherwise SN74CB3T3253PWR provides broader voltage flexibility and safety. |
| TS3A226AEYFFR | Single 2-channel SPDT, 0.7Ω rON, 1.65V–3.6V VCC, no 5V tolerance - optimized for ultra-low RON but limited I/O voltage range. | Cannot interface 5V sources; requires external clamping or level shifters for legacy 5V peripherals. | Prefer for low-RON, low-voltage-only designs; choose SN74CB3T3253PWR when 5V tolerance, dual 1-of-4 topology, or VCC-tracked translation is mandatory. |
Compared with SN74CBT3253PWR and TS3A226AEYFFR, the SN74CB3T3253PWR uniquely combines 5V-tolerant I/Os, VCC-tracked level translation, Ioff-enabled power-down isolation, and dual 1-of-4 architecture - making it the only option supporting mixed-voltage USB, memory, and industrial bus applications without supplemental circuitry.
Availability
SN74CB3T3253PWR is available at Aetrix Electronics and suitable for USB interface switching, memory interleaving, level translation bridges, and bus isolation applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant TSSOP packaging.
Supply support for SN74CB3T3253PWR 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 decades of expertise in high-speed logic and interface solutions.
The SN74CB3T3253PWR belongs to TI's CB3T series of advanced bus switches, designed specifically for mixed-voltage system interconnects requiring low-latency, bidirectional, and power-aware signal routing in portable and industrial electronics.
FAQ
What voltage levels can SN74CB3T3253PWR translate between?
The SN74CB3T3253PWR supports bidirectional voltage translation where output levels track VCC: with 3.3V VCC, it translates 5V inputs down to 3.3V outputs; with 2.5V VCC, it translates 5V or 3.3V inputs down to 2.5V outputs. Data I/Os tolerate 0V–5.5V regardless of VCC state, enabling robust interfacing across legacy and modern logic families in the SN74CB3T3253PWR.
Does SN74CB3T3253PWR support partial power-down operation?
Yes, the SN74CB3T3253PWR includes Ioff circuitry that disables current flow through the switch when VCC = 0V, preventing damaging back-current from live buses into a powered-down system. This feature ensures safe hot-swap and power-gating scenarios - a core design requirement explicitly validated in the SN74CB3T3253PWR datasheet under Recommended Operating Conditions and Absolute Maximum Ratings.
What is the maximum signal frequency supported by SN74CB3T3253PWR?
The SN74CB3T3253PWR has no specified maximum clock frequency, but its 0.25 ns typical propagation delay (at 3.3V) and 5pF OFF-state I/O capacitance enable reliable operation with digital signals up to 100+ MHz. System-level bandwidth depends on trace impedance, load capacitance, and driver strength - verified in the SN74CB3T3253PWR switching characteristics table and typical application layout guidelines.
Can SN74CB3T3253PWR replace SN74CBT3253PWR in existing designs?
SN74CB3T3253PWR is pin-compatible with SN74CBT3253PWR in the TSSOP-16 package and shares identical pinout and logic function, but adds 5V tolerance, Ioff, and VCC-tracked translation. Replacement is feasible if the design benefits from enhanced voltage flexibility and power-down safety - however, verify VCC range (2.3V–3.6V vs. 4.5V–5.5V) and update decoupling per SN74CB3T3253PWR recommendations before deployment.
What package type and moisture sensitivity level does SN74CB3T3253PWR use?
SN74CB3T3253PWR uses the PW (TSSOP-16) package: 5mm × 6.4mm body, 0.65mm lead pitch, RoHS-compliant, NIPDAU lead finish, and MSL Level-1 (260°C, unlimited floor life). This matches the mechanical and thermal specifications published in TI's official packaging addendum for SN74CB3T3253PWR, ensuring compatibility with standard SMT assembly processes.
SN74CB3T3253PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CB
- 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
SN74CB3T3253PWR FAQ
1.How can I place an order for SN74CB3T3253PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CB3T3253PWR 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 SN74CB3T3253PWR reliable?
The price and inventory of SN74CB3T3253PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CB3T3253PWR is usually 5 days.
3.What payment methods are accepted for SN74CB3T3253PWR?
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4.How is shipping managed for SN74CB3T3253PWR?
SN74CB3T3253PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CB3T3253PWR 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 SN74CB3T3253PWR?
For technical support, including SN74CB3T3253PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CB3T3253PWR requirements.
6.How does Aetrix verify that SN74CB3T3253PWR is sourced from the original manufacturer or authorized distributors?
All SN74CB3T3253PWR 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 SN74CB3T3253PWR meets industry standards.
7.What is the process for return or replacement of SN74CB3T3253PWR?
All SN74CB3T3253PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CB3T3253PWR, 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 SN74CB3T3253PWR part is unused and in its original packaging.
Return procedure for SN74CB3T3253PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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