Texas Instruments SN74CBTLV3384PWR

Overview

SN74CBTLV3384PWR from Texas Instruments is a low-voltage 10-bit FET bus switch in TSSOP-24 package, featuring 5-Ω on-state resistance, rail-to-rail switching, and I_off partial-power-down support. It operates from 2.3 V to 3.6 V and delivers sub-nanosecond propagation delay (0.15 ns typical at 2.5 V), enabling high-speed data path isolation in DDR memory interfaces and FPGA I/O expansion.

For engineers reviewing the SN74CBTLV3384PWR datasheet, SN74CBTLV3384PWR pinout, SN74CBTLV3384PWR application, or SN74CBTLV3384PWR equivalent, key selection criteria include guaranteed 5-Ω r_on at 2.5 V/3.3 V, dual independent 5-bit enable control, ±1 μA I_CC quiescent current, and JESD 22-compliant ESD protection (2000-V HBM).

Technical Context

This device implements ten independent FET-based transmission gates organized as two 5-bit banks, each with dedicated OE control. The switch architecture provides true bidirectional, noninverting signal routing with no internal logic or level translation - signal integrity depends solely on r_on, C_io(OFF) (10 pF), and load capacitance.

Its I_off specification (10 μA max at V_CC = 0 V) ensures isolation during partial power-down, preventing backflow current between powered and unpowered system domains. Rail-to-rail operation supports full-swing signals across the entire 2.3–3.6 V supply range without threshold degradation.

Key Specifications

Pinout & Package

TSSOP-24 package (PW), 7.9 mm × 4.5 mm × 1.2 mm height, lead pitch 0.65 mm, RoHS-compliant NIPDAU finish, MSL Level-1 (unlimited reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3384PWR, SN74CBT3384PWR trades I_off safety and low-voltage operation for higher drive strength in 5 V systems, while SN74LVC1G3157DCKR offers scalability at the cost of integration density and timing consistency across bit lanes.

Availability

SN74CBTLV3384PWR is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA I/O expansion, hot-swappable module interconnects, and test access point multiplexing requiring stable component supply across industrial temperature ranges (−40°C to 85°C).

Supply support for SN74CBTLV3384PWR 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 logic solutions, with over 90 years of innovation in high-reliability, high-performance components.

The SN74CBTLV3384PWR belongs to TI's CBTLV (low-voltage BiCMOS transistor logic) bus switch family, engineered for high-speed, low-distortion signal routing in memory, processor, and FPGA interconnect applications.

FAQ

What is the maximum operating frequency supported by SN74CBTLV3384PWR?

The SN74CBTLV3384PWR does not specify a maximum clock frequency because it is an analog bus switch, not a clocked logic device. Its usable bandwidth is determined by r_on (5 Ω) and C_io(OFF) (10 pF), yielding a −3 dB point >3 GHz for short traces. Signal integrity in practice depends on PCB layout, load capacitance, and edge rate - not internal clocking.

Does SN74CBTLV3384PWR require external pull-up resistors on OE pins?

Yes, SN74CBTLV3384PWR requires pull-up resistors on both 1OE and 2OE pins to ensure high-impedance state during power-up or power-down. TI recommends tying OE to V_CC through a resistor sized to sink the driver's output current - minimum value depends on the driving source's current-sinking capability, typically 10 kΩ for standard CMOS drivers.

Can SN74CBTLV3384PWR be used with 1.8 V logic signals?

No, SN74CBTLV3384PWR is not rated for 1.8 V operation. Its recommended V_CC range is 2.3 V to 3.6 V, and VIH/VIL thresholds are defined only within that range. Applying 1.8 V V_CC violates absolute maximum ratings and risks unreliable switching or increased r_on. For 1.8 V systems, consider TI's SN74AVC series or similar 1.8 V–3.3 V tolerant switches.

How does the I_off feature of SN74CBTLV3384PWR protect system circuitry?

The I_off feature in SN74CBTLV3384PWR limits current to ≤10 μA when V_CC = 0 V and any I/O pin is driven externally. This prevents damaging backflow current from powered downstream circuits into the unpowered switch, protecting both the SN74CBTLV3384PWR and upstream logic during partial power-down, hot-swap, or brownout conditions.

Is SN74CBTLV3384PWR pin-compatible with other packages in the same family?

Yes, SN74CBTLV3384PWR shares identical pinout and functionality with SN74CBTLV3384DBQR (SSOP), SN74CBTLV3384DWR (SOIC), and SN74CBTLV3384DGVR (TVSOP). All variants use the same 24-pin dual-inline arrangement with matching 1OE/2OE, A/B port, V_CC, and GND assignments - enabling drop-in replacement across package types without PCB redesign.