SN74CBTK16245DLR

Overview

The SN74CBTK16245DLR is a discontinued 16-bit FET bus switch from Texas Instruments, organized as two independent 8-bit switches. It operates within a supply voltage range of 4 V to 5.5 V and supports an operating temperature range of -40°C to +85°C. The device features TTL-compatible input levels and provides a low on-state resistance of 5 Ω typical at VCC = 4.5 V. Propagation delay is specified at 0.35 ns maximum for VCC = 4 V and 0.25 ns maximum for VCC = 5 V.

Feature Summary

• Features active-clamp undershoot-protection circuitry that clamps negative transients up to -2 V to prevent pass transistor turn-on during signal undershoot events.
• Supports partial-power-down mode via dedicated Ioff circuitry that disables outputs to prevent damaging current backflow when the device is unpowered.
• Provides high electrostatic discharge protection exceeding 2000 V human-body model and 1000 V charged-device model standards.

Applications

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

Procurement Notes

This component has been officially discontinued by Texas Instruments and is classified as obsolete. Verify availability through authorized distributors or secondary market suppliers such as Rochester Electronics. Confirm RoHS compliance status and lead finish details prior to procurement, as production data may vary based on remaining stock lots.

Selection Notes

Select this device only if the specific 5-ohm on-resistance and 4V-to-5.5V operating voltage align with the design requirements. Ensure the application benefits from the integrated active-clamp undershoot protection and partial-power-down capabilities. Note that alternative components in the SN74CBT family may be required due to the obsolescence of this specific part number.

Part Context

The SN74CBTK16245 belongs to the Widebus family of logic ICs manufactured by Texas Instruments. It utilizes a 48-pin SSOP package (DL suffix) and is designed for surface-mount installation. The device functions as a non-inverting bus switch, allowing bidirectional data flow between A and B ports when the output-enable inputs are asserted low.

Replacement Considerations

SN74CBT16245CDGGR is listed as a manufacturer-recommended substitute for this obsolete component.