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Product Detailed Parameters
- Description：IC BUS SWITCH 10 X 1:1 48TSSOP
- Series：74CBT
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Type：Bus Switch
- Circuit：10 x 1:1
- Independent Circuits：2
- Current - Output High, Low：-
- Voltage Supply Source：Single Supply
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：48-TFSOP (0.240", 6.10mm Width)
- Supplier Device Package：48-TSSOP
- Grade：-
- Qualification：-
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Overview
The SN74CBT16861DGGR is a 20-bit FET bus switch from Texas Instruments, organized as two independent 10-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 with a high-level control input voltage threshold of 2 V and a low-level threshold of 0.8 V. Typical on-state resistance is 14 Ohms at 4 V and 10 Ohms at 4.5 V. Propagation delay is typically 0.35 ns at 4 V and 0.25 ns at 5 V.
Feature Summary
- Provides 20 bits of high-speed bus switching functionality
- Features low on-state resistance for minimal propagation delay
- Includes separate output-enable inputs for each 10-bit switch
Applications
- High-speed data routing between ports
- Bus bridging applications requiring TTL compatibility
- Portable equipment utilizing single-supply operation
Procurement Notes
Verify the specific package marking CBT16861 corresponds to the DGGR TSSOP variant. Confirm that the active OE pin logic matches system requirements, where a low state connects ports A and B. Ensure unused control inputs are tied to VCC or GND to maintain proper device operation and prevent undefined states.
Selection Notes
Select this component when a 48-pin surface-mount solution is required for 20-bit switching. The DGGR suffix indicates a TSSOP package suitable for space-constrained designs. Verify that the 4 V to 5.5 V supply range aligns with the target system voltage and that the -40°C to 85°C industrial temperature rating meets environmental specifications.
Part Context
This part belongs to the SN74CBT16861 family, which provides widebus capabilities. The DGGR designation specifically identifies the tape-and-reel packaging format in a 48-pin Thin Shrink Small Outline Package (TSSOP). It shares functional characteristics with other variants like the DL and DGV packages but differs in physical dimensions and thermal properties.
Replacement Considerations
SN74CBT16861DLR
FAQ
How does the output-enable (OE) pin function?
When OE is low, the switch connects port A to port B. When OE is high, the switch disconnects the ports, placing them in a high-impedance state.
What is the latch-up performance rating?
The latch-up performance exceeds 100 mA per JESD 78, Class II standards.
