SN74CBTK16245DL

Overview

The SN74CBTK16245DL is a discontinued 16-bit FET bus switch manufactured by Texas Instruments, housed in a 48-pin SSOP package. It operates within a supply voltage range of 4 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features two independent 8-bit switches with TTL-compatible input levels and low on-state resistance ranging from 5 Ω to 14 Ω depending on conditions. Propagation delay is specified at 0.35 ns maximum at 4 V and 0.25 ns at 5 V.

Feature Summary

• Integrates active-clamp undershoot-protection circuitry on I/Os to clamp negative transients up to –2 V
• Supports partial-power-down mode via dedicated Ioff circuitry that disables outputs to prevent backflow current
• Provides high electrostatic discharge protection exceeding JESD 22 standards for human-body, machine, and charged-device models

Applications

• High-speed TTL-compatible bus switching applications
• Partial-power-down system configurations requiring output isolation
• Systems utilizing standard '16245-type pinout architectures

Procurement Notes

Verify component obsolescence status prior to design finalization as this specific part number has been discontinued by the manufacturer. Confirm availability through authorized distributors or secondary market suppliers. Ensure replacement strategies account for potential lead time variations associated with end-of-life components.

Selection Notes

Select this component only if legacy compatibility with standard '16245 pinouts is required. Evaluate alternative devices within the SN74CBT family if new designs are permissible. Verify that the 4 V to 5.5 V supply voltage range aligns with system power rails and confirm thermal requirements for the SSOP-48 package.

Part Context

This device belongs to the Widebus family of bus switches designed for high-density digital interconnects. It utilizes FET technology to achieve low on-resistance and minimal propagation delay compared to traditional bipolar implementations. The specific DL suffix denotes the SSOP plastic small-outline package variant.

Replacement Considerations

SN74CBT16245CDGGR