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Product Detailed Parameters
- Description：IC 10-BIT FET BUS SW 24-SSOP
- Series：74CBT
- Mfr：Texas Instruments
- Package：Bulk
- Type：FET Bus Switch
- Circuit：10 x 1:1
- Independent Circuits：1
- Current - Output High, Low：-
- Voltage Supply Source：Single Supply
- Voltage - Supply：4V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：24-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：24-SSOP
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Overview
The SN74CBT6800DBR is a 10-bit bus switch IC manufactured by Texas Instruments, housed in a plastic shrink small-outline (DB) package. It operates within a supply voltage range of 4 V to 5.5 V and supports an operating temperature from -40°C to 85°C. The device features TTL-compatible input and output levels with a maximum on-state resistance of 20 Ohms at VCC = 4 V. Propagation delay is specified at 0.25 ns under standard conditions.
Feature Summary
- Provides ten bits of high-speed bidirectional bus switching with near-zero propagation delay.
- Precharges the B port to a user-selectable bias voltage to minimize signal distortion during live insertion.
- Features TTL-compatible input and output levels for broad interface compatibility.
Applications
- High-speed data bus routing
- Live insertion applications requiring minimized noise
- Bidirectional signal path control
Procurement Notes
Verify the specific DB package variant against current datasheet revisions before procurement. Confirm that the required bias voltage configuration aligns with system design constraints. Ensure thermal dissipation requirements are met for the plastic shrink small-outline package in the intended application environment.
Selection Notes
Select this component when a 10-bit wide bus switch with low on-resistance is required. The precharge feature makes it suitable for systems where live insertion occurs. Verify that the 4 V to 5.5 V supply range matches the target logic levels and that the DB package footprint fits the PCB layout.
Part Context
This part belongs to the SN74CBT6800 series of 10-bit bus switches. It shares functionality with other variants in the family but is distinguished by its specific DB package option. The series is designed for applications requiring high-speed switching with minimal signal degradation.
Replacement Considerations
Check for SN74CBT6800DW or SN74CBT6800PW equivalents if different package footprints are needed. Verify pinout compatibility and electrical specifications match exactly before substitution.
FAQ
How does the device handle live insertion?
When the switch is off, the B port is precharged to a user-selectable bias voltage through an equivalent 10-kΩ resistor, minimizing signal distortion and noise during live insertion.
What is the maximum on-state resistance?
The maximum on-state resistance is 20 Ohms when VCC is 4 V and VI is 2.4 V with II at 15 mA.
