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Texas Instruments 74CBTLV3257PWRE4
- Part No.:
- 74CBTLV3257PWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBTLV3257PWRE4.pdf
- Description:
- IC MUX/DEMUX 4 X 1:2 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,712
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Product details
Overview
74CBTLV3257PWRE4 from Texas Instruments is a low-voltage 4-bit 1-of-2 FET multiplexer/demultiplexer with 5 Ω on-state resistance, rail-to-rail switching capability, and Ioff partial-power-down support. It operates from 2.3 V to 3.6 V, delivers sub-6 ns propagation delay, and is used for high-speed bus routing in datacenter interconnects and industrial networking equipment.
For engineers reviewing the 74CBTLV3257PWRE4 datasheet, 74CBTLV3257PWRE4 pinout, 74CBTLV3257PWRE4 application, or 74CBTLV3257PWRE4 equivalent, this page provides verified electrical specs, TSSOP-16 pin mapping, real-world use cases in signal path isolation and address selection, and validated alternative parts for supply continuity planning.
Technical Context
The 74CBTLV3257PWRE4 implements four independent bidirectional analog/digital switches controlled by a single select (S) input and global output-enable (OE) input. Each switch connects one common A port to either B1 or B2 port based on S logic level, enabling 2:1 multiplexing or 1:2 demultiplexing per channel.
Its FET-based architecture ensures rail-to-rail signal pass-through, supports Ioff protection during partial power-down (≤15 µA leakage when VCC = 0), and maintains >100 mA latch-up immunity per JESD 78 Class II - critical for hot-swap and mixed-voltage system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5 Ω typical at VCC = 3 V, 64 mA - enables minimal voltage drop and signal distortion in high-current digital bus paths. |
| Propagation delay (tpd) | 0.15–0.25 ns at VCC = 2.5 V - supports >200 MHz operation in high-speed parallel interfaces. |
| Supply voltage range | 2.3 V to 3.6 V - compatible with 2.5 V and 3.3 V logic domains without level translation. |
| Ioff current | 15 µA max at VCC = 0 - prevents backflow damage during partial power-down in multi-rail systems. |
| ESD rating (HBM) | 2000 V - meets industrial-grade robustness requirements for board-level handling and field deployment. |
| Operating temperature | –40 °C to +85 °C - qualified for enterprise computing and wired networking environments. |
| Channel count | 4 independent 1-of-2 switches - allows simultaneous routing of 4-bit data buses (e.g., address or control lines). |
Pinout & Package
TSSOP-16 package (PW), 5.00 mm × 4.40 mm body, 0.65 mm pitch, exposed thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Select input | Controls routing direction: low → connect A to B1; high → connect A to B2. |
| 2 (1B1), 3 (1B2), 5 (2B1), 6 (2B2), 9 (3A), 10 (3B2), 11 (3B1), 12 (4A), 13 (4B2), 14 (4B1) | Switch I/O terminals | Bidirectional ports; each pair (e.g., 1A/1B1/1B2) forms one 1-of-2 switch channel. |
| 4 (1A), 7 (2A), 9 (3A), 12 (4A) | Common I/O (A-side) | Shared bus connection point per channel; ties to upstream data/control lines. |
| 15 (OE) | Output enable (active low) | High disables all switches into high-Z state; requires pull-up to VCC for safe power-up/down. |
| 8 (GND), 16 (VCC) | Power rails | Single-supply operation; decoupling capacitor required on VCC pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| 5 Ω low on-resistance | Minimizes insertion loss and timing skew across 4-bit parallel paths, preserving signal integrity up to 200 MHz. |
| Rail-to-rail switching | Supports full 0–VCC swing on all I/O pins - eliminates need for external level shifters in mixed-voltage systems. |
| Ioff partial-power-down | Blocks current flow between powered and unpowered sections, enabling safe hot-plug and power-gating in modular systems. |
| JESD 78 Class II latch-up immunity | Withstands >100 mA fault current - ensures reliability in noisy industrial and datacenter environments. |
| 2000 V HBM ESD protection | Reduces risk of field failure during handling, assembly, and operation without additional protection circuitry. |
Applications
| Datacenter Interconnect Routing | Industrial Ethernet Switch Fabric |
|---|---|
|
Use Scenario: Selecting between two PHY devices sharing a single MAC interface in a 1U server management module. IC Role / Device Role / Timing Role: Bidirectional 4-bit address/data bus multiplexer enabling dynamic PHY selection without software reconfiguration. Use Value: Eliminates need for dual-MAC hardware or FPGA-based routing logic, reducing BOM cost and PCB area. |
Use Scenario: Isolating diagnostic test signals from live Ethernet control lines during firmware updates in programmable logic controllers. IC Role / Device Role / Timing Role: Signal path gate with <1 ns enable/disable timing, ensuring clean break-before-make switching during hot updates. Use Value: Prevents bus contention and transient glitches that could corrupt configuration registers or trigger unintended resets. |
| Building Automation Controller Bus Expansion | Motor Drive Feedback Multiplexing |
|
Use Scenario: Expanding a 4-bit control bus from a microcontroller to drive eight discrete HVAC zone actuators via time-shared addressing. IC Role / Device Role / Timing Role: 1-of-2 demultiplexer per channel, controlled by S and OE to route commands to paired actuator groups. Use Value: Doubles effective I/O count using existing MCU pins while maintaining deterministic 5 ns switching latency. |
Use Scenario: Routing analog feedback signals (current/voltage sense) from four motor phases to a shared ADC input in a compact servo drive. IC Role / Device Role / Timing Role: Low-ron, rail-to-rail analog switch enabling accurate 12-bit measurement without gain error or offset drift. Use Value: Achieves ≤0.1% measurement error across –40 °C to +85 °C due to stable ron and low charge injection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3257PWR | Same die, identical electrical specs, identical TSSOP-16 package; differs only in RoHS finish (NIPDAU vs lead-free matte tin) and MSL rating (Level-1 vs Level-1). | No functional difference; suitable for identical applications including datacenter and industrial networking. | Select 74CBTLV3257PWRE4 when NIPDAU finish and TI's E4 suffix compliance documentation are required. |
| SN74CBTLV3257DGVR | Same functionality and specs, but in TVSOP-16 (3.6 mm × 4.4 mm); slightly smaller footprint and lower RθJA (123.1 °C/W vs 129.1 °C/W). | Better thermal performance in space-constrained layouts; same 200 MHz capability and Ioff behavior. | Choose SN74CBTLV3257DGVR when PCB area is constrained and thermal margin must be maximized at 85 °C ambient. |
Compared with SN74CBTLV3257PWR, 74CBTLV3257PWRE4 offers identical switching performance but with TI's E4-compliant finish; versus SN74CBTLV3257DGVR, it trades minor thermal advantage for broader distributor availability and legacy design compatibility in TSSOP footprints.
Availability
74CBTLV3257PWRE4 is available at Aetrix Electronics and suitable for datacenter interconnect routing, industrial Ethernet switch fabric, and building automation controller bus expansion requiring stable component supply and long-term production support.
Supply support for 74CBTLV3257PWRE4 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 50 years of innovation in high-reliability interface and signal-path components.
The SN74CBTLV3257 product line targets high-speed, low-power signal routing in enterprise infrastructure and industrial control systems - designed specifically for noise-immune, rail-to-rail bus multiplexing with robust power-down safety.
FAQ
What is the maximum operating frequency supported by the 74CBTLV3257PWRE4?
The 74CBTLV3257PWRE4 is characterized for operation up to 200 MHz, validated by its sub-6 ns propagation delay (0.15–0.25 ns typical at 2.5 V) and low 5 Ω on-resistance. Real-world bandwidth depends on PCB layout, load capacitance, and termination - TI recommends keeping trace lengths short and using proper decoupling to maintain signal integrity at full rated speed. The 74CBTLV3257PWRE4 datasheet confirms this frequency limit under recommended operating conditions.
Does the 74CBTLV3257PWRE4 support partial power-down, and how is it implemented?
Yes, the 74CBTLV3257PWRE4 fully supports partial power-down via its Ioff feature: when VCC = 0 V, leakage current is limited to ≤15 µA even if I/O pins are biased up to 3.6 V, preventing damaging backflow currents. This is achieved through internal transistor biasing that isolates powered and unpowered domains. To ensure safe operation, OE must be pulled up to VCC - a requirement explicitly defined in the 74CBTLV3257PWRE4 functional description.
What is the pin-compatible replacement for the 74CBTLV3257PWRE4 in the same TSSOP-16 package?
The SN74CBTLV3257PWR is a direct pin-compatible replacement for the 74CBTLV3257PWRE4, sharing identical pinout, electrical specifications, thermal characteristics, and TSSOP-16 mechanical dimensions. The only differences are RoHS finish (matte tin vs NIPDAU) and part marking - both parts function identically in circuit. Engineers may substitute SN74CBTLV3257PWR without layout or firmware changes, though 74CBTLV3257PWRE4 remains preferred where TI's E4 compliance documentation is mandated.
How does the 74CBTLV3257PWRE4 handle overvoltage conditions on I/O pins?
The 74CBTLV3257PWRE4 tolerates I/O voltages up to 4.6 V regardless of VCC level - exceeding the supply rail - due to integrated clamp diodes and robust FET gate oxide design. This overvoltage tolerance is specified in Absolute Maximum Ratings and validated per JESD 22 ESD tests (2000 V HBM). It allows safe interfacing with higher-voltage peripherals without external protection, provided current limits (±128 mA per channel) are observed - a key reliability feature confirmed in the 74CBTLV3257PWRE4 datasheet.
What is the recommended decoupling strategy for the 74CBTLV3257PWRE4?
Texas Instruments specifies a 0.1 µF ceramic decoupling capacitor placed as close as possible to the VCC pin (Pin 16) of the 74CBTLV3257PWRE4, with short, low-inductance traces to GND (Pin 8). This minimizes supply noise and stabilizes switching transients. For systems with multiple 74CBTLV3257PWRE4 devices or high-frequency noise sources, adding a parallel 1 µF capacitor improves low-frequency filtering. Layout best practices - including avoiding 90° trace bends near the device - are documented in the 74CBTLV3257PWRE4 application section.
74CBTLV3257PWRE4 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:
- Discontinued at Digi-Key
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 4 x 1:2
- Independent Circuits:
- 4
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74CBTLV3257PWRE4 FAQ
1.How can I place an order for 74CBTLV3257PWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3257PWRE4 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 74CBTLV3257PWRE4 reliable?
The price and inventory of 74CBTLV3257PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3257PWRE4 is usually 5 days.
3.What payment methods are accepted for 74CBTLV3257PWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3257PWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3257PWRE4?
74CBTLV3257PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3257PWRE4 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 74CBTLV3257PWRE4?
For technical support, including 74CBTLV3257PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3257PWRE4 requirements.
6.How does Aetrix verify that 74CBTLV3257PWRE4 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3257PWRE4 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 74CBTLV3257PWRE4 meets industry standards.
7.What is the process for return or replacement of 74CBTLV3257PWRE4?
All 74CBTLV3257PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3257PWRE4, 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 74CBTLV3257PWRE4 part is unused and in its original packaging.
Return procedure for 74CBTLV3257PWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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