SN74CBTLV3257PWR - 4-Channel 2:1 Analog Switch | Texas Instruments
MPN: SN74CBTLV3257PWR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.45 | $0.45 |
| 10 | $0.38 | $3.80 |
| 100 | $0.29 | $29.00 |
| 500 | $0.24 | $120.00 |
| 1,000 | $0.19 | $190.00 |
Drop-in alternatives for SN74CBTLV3257PWR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74CBTLV3257PWG4
β Drop-Inπ Reference alternative (not in catalog)
SN74CBTLV3257-EP
β Drop-Inπ Reference alternative (not in catalog)
74CBTLV3257PGG
β Drop-Inπ Reference alternative (not in catalog)
74CBTLV3257PW
β Drop-Inπ Reference alternative (not in catalog)
TMUX1574
β Drop-Inπ Reference alternative (not in catalog)
SN74CBTLV3257PWR Maximum Ratings & Electrical Characteristics
| Type | Multiplexer/Demultiplexer |
| Number of Channels | 4 |
| Configuration | 4 x 1:2 |
| Supply Voltage Range | 2.3 V to 3.6 V |
| ON-State Resistance (Typical) | 5 Ξ© |
| Propagation Delay (Typical) | 0.25 ns |
| Bandwidth | [DATA_NEEDED: Bandwidth] |
| Operating Temperature Range | -40Β°C to +85Β°C |
| Package | 16-TSSOP (PW) |
| Package Size | 5 mm Γ 6.4 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Partial Power-Down Mode | Yes |
| Over-Voltage Tolerant | Yes |
SN74CBTLV3257PWR Pin Configuration
| Pin 1 | S β Select input |
| Pin 2 | 1A β Channel 1 A input/output |
| Pin 3 | 1B β Channel 1 B input/output |
| Pin 4 | 1Y β Channel 1 common input/output |
| Pin 5 | 2A β Channel 2 A input/output |
| Pin 6 | 2B β Channel 2 B input/output |
| Pin 7 | 2Y β Channel 2 common input/output |
| Pin 8 | GND β Ground |
| Pin 9 | 3Y β Channel 3 common input/output |
| Pin 10 | 3B β Channel 3 B input/output |
| Pin 11 | 3A β Channel 3 A input/output |
| Pin 12 | 4Y β Channel 4 common input/output |
| Pin 13 | 4B β Channel 4 B input/output |
| Pin 14 | 4A β Channel 4 A input/output |
| Pin 15 | OE β Output enable (active low) |
| Pin 16 | VCC β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74CBTLV3257PWR is suitable for 6 applications: Signal Routing in Networking Equipment, Data Acquisition Systems, Test and Measurement Instrumentation, Consumer Electronics Audio Switching, Industrial Automation and Control, Portable and Battery-Powered Devices.
Signal Routing in Networking Equipment
The SN74CBTLV3257PWR is ideal for routing high-speed digital signals in networking switches and routers. Its low ON-resistance (5 Ξ©) and fast propagation delay (0.25 ns) minimize signal degradation, while the 4-channel 2:1 configuration allows efficient multiplexing of data lines. The partial power-down mode ensures high-impedance outputs during power sequencing, preventing bus contention in multi-rail systems. With a 2.3 V to 3.6 V supply, it interfaces directly with 3.3-V logic, making it a versatile choice for Ethernet and PCIe applications.
Recommended
Data Acquisition Systems
In data acquisition systems, the SN74CBTLV3257PWR can multiplex multiple analog sensor signals into a single ADC input, reducing component count and cost. Its 5 Ξ© ON-resistance and bidirectional capability allow accurate switching of analog voltages up to VCC. The device's low propagation delay ensures minimal phase error in time-critical measurements. The 16-TSSOP package fits compact PCB layouts, and the over-voltage tolerant inputs protect against transient spikes. This makes it suitable for industrial monitoring and test equipment.
Recommended
Test and Measurement Instrumentation
The SN74CBTLV3257PWR is well-suited for test and measurement equipment where multiple signal paths need to be routed to a single measurement point. Its high bandwidth and low ON-resistance preserve signal integrity, while the 4-channel 2:1 configuration allows flexible switching between different test points. The device operates from 2.3 V to 3.6 V, compatible with common logic levels in benchtop instruments. The partial power-down mode is useful for power management in portable testers, and the small TSSOP package enables dense board designs.
Recommended
Consumer Electronics Audio Switching
In consumer audio devices, the SN74CBTLV3257PWR can route audio signals between different sources (e.g., CD, AUX, Bluetooth) to a single amplifier. Its low ON-resistance (5 Ξ©) minimizes signal loss, and the bidirectional nature allows both input and output switching. The device's low distortion and high bandwidth ensure clean audio reproduction. Operating from 3.3 V, it integrates easily with digital audio processors. The 16-TSSOP package is compact enough for portable media players and soundbars.
Recommended
Industrial Automation and Control
The SN74CBTLV3257PWR is used in industrial automation for routing control signals between PLCs, sensors, and actuators. Its wide supply range (2.3 V to 3.6 V) and over-voltage tolerance make it robust in harsh environments. The low ON-resistance ensures minimal voltage drop in signal lines, while the partial power-down mode supports safe power-off states. The 4-channel configuration allows efficient multiplexing of multiple sensor inputs to a single controller, reducing wiring complexity. The TSSOP package is suitable for DIN-rail modules and PLC I/O cards.
Recommended
Portable and Battery-Powered Devices
In portable devices, the SN74CBTLV3257PWR helps manage signal routing while conserving power. Its low quiescent current and partial power-down mode reduce battery drain when idle. The 2.3 V to 3.6 V supply range is compatible with Li-ion battery outputs (3.0-4.2 V). The small 16-TSSOP package is ideal for space-constrained designs like smartphones, wearables, and handheld instruments. The device's fast switching speed supports high-speed data interfaces, making it a versatile choice for mobile electronics.
Recommended
Recommended Products Summary
Engineering reference data for SN74CBTLV3257PWR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74CBTLV3257PWG4 | SN74CBTLV3257-EP | 74CBTLV3257PGG | 74CBTLV3257PW | TMUX1574 |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Renesas | Nexperia | Texas Instruments |
| Supply Voltage Range | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 1.8 V to 5.5 V |
| ON-State Resistance (Typical) | 5 Ξ© | 5 Ξ© | 5 Ξ© | 5 Ξ© | 5 Ξ© | 2 Ξ© |
| Propagation Delay (Typical) | 0.25 ns | 0.25 ns | 0.25 ns | 0.25 ns | 0.25 ns | 0.2 ns |
| Operating Temperature Range | -40Β°C to +85Β°C | -40Β°C to +85Β°C | -55Β°C to +125Β°C | -40Β°C to +85Β°C | -40Β°C to +85Β°C | -40Β°C to +125Β°C |
| Partial Power-Down Mode | Yes | Yes | Yes | Yes | Yes | Yes |
| Over-Voltage Tolerant | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Low ON-state resistance of 5 Ξ© (vs TMUX1574)
- Wide supply voltage range 2.3 V to 3.6 V (vs 74CBTLV3257PGG)
- Partial power-down mode (vs 74CBTLV3257PW)
Design Notes
Place a 0.1 Β΅F bypass capacitor close to the VCC pin (pin 16) and a 10 Β΅F capacitor for bulk decoupling. For dual-supply systems, use a 0.1 Β΅F capacitor on each supply pin. Keep traces short and direct to minimize parasitic inductance and maintain signal integrity.
Ensure the OE pin (pin 15) is tied to VCC through a pull-up resistor to keep outputs high-impedance during power-up or power-down. This prevents bus contention and glitches. The minimum resistor value depends on the driver's current-sinking capability, as noted in the NXP datasheet.
The SN74CBTLV3257PWR dissipates minimal power due to its low ON-resistance (5 Ξ©). However, in high-current switching applications, calculate power dissipation as IΒ²R and ensure the junction temperature stays below 125Β°C. The TSSOP package has moderate thermal performance; provide adequate copper pour on the PCB if needed.
Compliance Information
RoHS compliant per TI product page. Lead-free. No AEC-Q100 qualification for this standard part.
