SN74CB3T16211ZQLR

Overview

The SN74CB3T16211ZQLR is a high-speed FET bus switch from the Widebus family, organized as two independent 12-bit switches within a single 56-pin VFBGA package. It operates with a supply voltage (VCC) ranging from 2.3 V to 3.6 V and supports bidirectional data flow between A and B ports controlled by separate OE inputs. The device features low ON-state resistance (ron) of approximately 5 Ω and near-zero propagation delay. Data I/Os are 5-V tolerant, allowing mixed-mode signal operation across various logic levels including 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5 V.

Feature Summary

• Supports mixed-mode signal operation on all data I/O ports with voltage translation that tracks VCC
• Features 5-V tolerant I/Os that function correctly whether the device is powered up or powered down
• Includes Ioff support for partial-power-down mode to prevent damaging backflow current
• Provides bidirectional data flow with low ON-state resistance and minimal loading capacitance

Applications

• Level translation in mixed-voltage systems
• PCI interface connections
• Bus isolation applications

Procurement Notes

Verify the specific ZQL suffix indicates the VFBGA package variant when sourcing. Confirm RoHS compliance and lead finish specifications against the manufacturer's latest ordering information. Ensure design compatibility with the 56-pin Microstar Junior footprint dimensions and thermal requirements specified in the datasheet.

Selection Notes

Select this component for designs requiring low power consumption and high-speed switching between different voltage domains. The dual 12-bit configuration allows flexible routing of parallel data buses. Consider the 5-V tolerance feature if interfacing with legacy 5-V logic standards while operating at lower core voltages.

Part Context

This part belongs to the Texas Instruments SN74CB3T16211 series, which includes variants in TSSOP, TVSOP, SSOP, and VFBGA packages. The ZQL suffix specifically denotes the Lead-free VFBGA package option. The device is an active product recommended for new designs within the Widebus family of low-voltage bus switches.

Replacement Considerations

Direct substitutes include other SN74CB3T16211 variants such as SN74CB3T16211DGGR (TSSOP) or SN74CB3T16211DLR (SSOP), provided the package form factor change is acceptable for the PCB layout.