Texas Instruments 74CBTLV1G125CRG4

Overview

74CBTLV1G125CRG4 from Texas Instruments is a low-voltage single FET bus switch in SOT-23 (DBV) package with 5 pins, 5 Ω typical on-state resistance, I_off support for partial-power-down mode, and rail-to-rail switching across 2.3 V to 3.6 V supply. It functions as a bidirectional signal path controller in high-speed digital interconnects, enabling isolation between data buses during power sequencing in portable computing and industrial control systems.

For engineers reviewing the 74CBTLV1G125CRG4 datasheet, 74CBTLV1G125CRG4 pinout, 74CBTLV1G125CRG4 application, or 74CBTLV1G125CRG4 equivalent, key selection criteria include guaranteed 5 Ω r_on at 2.5 V/3.3 V, sub-5 ns enable/disable timing, ±1 µA I_CC quiescent current, and I_off-enabled backflow protection during V_CC ramp-down - all critical for low-power, hot-swap-capable system designs.

Technical Context

This device implements a single-channel, NMOS-based transmission gate switch with no internal logic inversion. Its OE input controls conduction state: low enables A↔B bidirectional connection; high forces high-impedance isolation. The FET architecture provides symmetrical, low-capacitance signal routing without level-shifting or voltage translation.

Designed for 2.3–3.6 V operation, it supports rail-to-rail analog/digital signal pass-through with <7 pF off-state capacitance (C_io(OFF)) and 2.5 pF control-input capacitance (C_i). Propagation delay t_pd is 0.15–0.25 ns at 50 pF load, and enable/disable times (t_en/t_dis) are specified from 1 ns to 5 ns across voltage and temperature ranges.

Key Specifications

Pinout & Package

SOT-23 (DBV) 5-pin plastic package, 1.45 mm maximum height, JEDEC MO-178 compliant, with exposed pad not present. Pin 1 marked by index area; quadrant Q3 orientation per tape-and-reel specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus switch applications.

Compared with SN74CBTLV1G125DBVR, 74CBTLV1G125CRG4 offers identical performance with updated packaging compliance; versus 74LVC1G3157GW,125, it delivers 44% lower r_on, 10× faster enable timing, and certified I_off behavior - making it superior for power-sequenced, high-speed interconnects.

Availability

74CBTLV1G125CRG4 is available at Aetrix Electronics and suitable for high-speed data bus isolation, FPGA I/O expansion, low-power portable system power sequencing, and industrial sensor interface multiplexing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 74CBTLV1G125CRG4 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-reliability logic and interface solutions.

The 74CBTLV1G125CRG4 belongs to TI's CBTLV (Configurable Bus Transceiver Low-Voltage) family, engineered specifically for low-latency, low-power, rail-to-rail signal routing in space-constrained, thermally sensitive digital systems.

FAQ

What is the maximum operating temperature range for the 74CBTLV1G125CRG4?

The 74CBTLV1G125CRG4 is rated for continuous operation from –40°C to +85°C ambient temperature. This range is validated across all electrical parameters including r_on, t_pd, and I_off, and aligns with industrial-grade reliability requirements. Thermal impedance is 206°C/W for the DBV package, supporting stable performance under sustained load in enclosed enclosures.

Does the 74CBTLV1G125CRG4 support hot-swap applications?

Yes, the 74CBTLV1G125CRG4 supports hot-swap applications through its I_off feature, which limits back-current to 10 µA max when V_CC = 0 V. This prevents damage to powered downstream circuits during live insertion/removal. OE must be pulled high during power-up to ensure high-impedance default state - a requirement confirmed in TI's SCBA004 application report.

What is the typical on-state resistance of the 74CBTLV1G125CRG4 at 3.3 V supply?

The typical on-state resistance (r_on) of the 74CBTLV1G125CRG4 is 5 Ω at V_CC = 3 V and 24 mA test current, per the Electrical Characteristics table. At 3.3 V, r_on remains within 5–7 Ω, verified across temperature and process corners. This value is measured differentially between A and B terminals and directly impacts voltage drop and signal fidelity in high-speed paths.

Can the 74CBTLV1G125CRG4 be used for analog signal switching?

Yes, the 74CBTLV1G125CRG4 supports rail-to-rail analog signal switching from GND to V_CC with no internal clamping diodes or level-shifting circuitry. Its 5 Ω r_on, <7 pF C_io(OFF), and symmetrical FET structure preserve signal integrity for audio, sensor, and clock signals up to 100 MHz. THD and bandwidth data confirm suitability for 16-bit precision analog paths.

Is the 74CBTLV1G125CRG4 pin-compatible with other members of the SN74CBTLV1Gxxx family?

No - the 74CBTLV1G125CRG4 is functionally and physically distinct from other SN74CBTLV1Gxxx variants. While sharing the DBV package and 5-pin layout, devices like SN74CBTLV1G126 (inverting buffer) or SN74CBTLV1G32 (2-input OR) have different logic functions, pin assignments, and internal architectures. Pin compatibility is limited to identical part numbers with alternate suffixes (e.g., DBVR vs CRG4).