SN74CBT16210CDL

Overview

The SN74CBT16210CDL is a high-speed TTL-compatible FET bus switch from the Widebus family, housed in a 48-pin SSOP package. It features two independent 10-bit switches or one 20-bit configuration with separate output-enable inputs. Operating within a supply voltage range of 4 V to 5.5 V, it supports data I/O levels from 0 V to 5 V. The device exhibits low ON-state resistance (typically 3 Ω at 4.5 V) and near-zero propagation delay (150 ps at 5 V). It includes active undershoot protection up to -2 V on A and B ports, ensuring isolation during partial-power-down via the Ioff feature.

Feature Summary

• Active undershoot-protection circuitry on A and B ports ensures proper OFF state during signal dips down to -2 V.
• Ioff feature enables partial-power-down mode by preventing damaging backflow current when the device is unpowered.
• Bidirectional data flow capability with near-zero propagation delay due to low ON-state resistance characteristics.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'DL' corresponds to the SSOP-48 tube packaging format required for your assembly process. Confirm that the operating temperature range of -40°C to 85°C aligns with your environmental specifications. Ensure control inputs are tied to VCC or GND to maintain the high-impedance state during power-up sequences.

Selection Notes

Select this component when designing systems requiring wide-bus switching with minimal signal distortion. It is suitable for applications needing support for multiple signaling levels including 1.8-V, 2.5-V, 3.3-V, and 5-V. Consider its latch-up performance exceeding 100 mA per JESD 78 Class II if robustness against ESD events is critical.

Part Context

This device belongs to Texas Instruments' Widebus family of high-speed FET bus switches. It shares functional similarities with other members like the SN74CBT16212 but differs in bit width and pinout configuration. The SN74CBT16210C series provides a solution for managing large data buses where low capacitance and fast switching speeds are necessary to maintain signal integrity.

Replacement Considerations

The SN74CBT16210CDLR serves as the tape-and-reel equivalent of the SN74CBT16210CDL. Other variants include the SN74CBT16210CDGG (TSSOP) and SN74CBT16210CDGVR (TVSOP). Verify pin compatibility and package dimensions before substituting with these alternative packages.

FAQ

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

The SN74CBT16210CDL supports partial-power-down mode through its Ioff feature. This ensures that no damaging current flows back through the device when VCC is zero, maintaining isolation between powered and unpowered sections of the system.

What is the maximum undershoot voltage the A and B ports can withstand?

The device features active undershoot-protection circuitry on both the A and B ports. This allows the ports to tolerate undershoot voltages down to -2 V without compromising the OFF state of the switch.