SN74CB3Q16210DGG

Overview

The SN74CB3Q16210DGG is a high-bandwidth FET bus switch from the Widebus family, organized as two independent 10-bit switches within a 48-pin TSSOP package. It operates on a single supply voltage ranging from 2.3 V to 3.6 V and supports bidirectional data flow with near-zero propagation delay. The device utilizes an internal charge pump to maintain low and flat ON-state resistance across the operating range. Data I/O ports support rail-to-rail switching for both 5-V and 3.3-V signaling levels, accommodating various logic families including TTL and CMOS control inputs.

Feature Summary

• Utilizes a charge pump mechanism to elevate gate voltage, ensuring low and flat ON-state resistance characteristics over the full operating temperature range.
• Supports 5-V tolerant I/Os that function correctly whether the device is powered up or in a partial-power-down state.
• Features low input/output capacitance to minimize capacitive loading and signal distortion on high-speed data buses.
• Includes undershoot clamp diodes on data and control inputs to protect against transient voltage spikes.

Applications

• PCI interface connections
• Memory interleaving systems
• Bus isolation circuits
• Low-distortion signal gating

Procurement Notes

Verify the specific ordering suffix 'DGG' corresponds to the TSSOP-48 package configuration required for your PCB layout. Confirm that the design accommodates the recommended operating conditions, specifically the 2.3 V to 3.6 V supply voltage range. Ensure unused control inputs are tied to VCC or GND to prevent undefined states during operation.

Selection Notes

Select this component when designing broadband communications or networking systems requiring high-bandwidth data paths. It is suitable for applications needing rail-to-rail switching capabilities between different voltage domains. Consider the 48-pin TSSOP footprint constraints and the requirement for separate output-enable inputs for each 10-bit switch segment.

Part Context

This part belongs to Texas Instruments' Widebus family of high-bandwidth FET bus switches. It is designed to provide optimized interface solutions for data-intensive computing systems. The device is manufactured by Texas Instruments and is available in multiple package options including SSOP and TVSOP variants alongside the TSSOP version.

Replacement Considerations

SN74CB3Q16210DGGR (Tape and Reel variant)

FAQ

How does the device handle partial-power-down scenarios?

The SN74CB3Q16210DGG features dedicated Ioff circuitry that prevents damaging current backflow through the device when it is powered down, providing effective isolation during power-off states.

What is the maximum switching frequency for the control inputs?

The maximum switching frequency for the OE control input is specified at 20 MHz under recommended operating conditions.