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Product Detailed Parameters
- Description：IC BUS SWITCH 8 X 1:1 20VQFN
- Series：74CB
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Bus Switch
- Circuit：8 x 1:1
- Independent Circuits：1
- Current - Output High, Low：-
- Voltage Supply Source：Single Supply
- Voltage - Supply：2.3V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-VFQFN Exposed Pad
- Supplier Device Package：20-VQFN (3.5x4.5)
- Grade：-
- Qualification：-
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Overview
The SN74CB3Q3245RGYR is an 8-bit FET bus switch from the 74CB series, manufactured by Texas Instruments. It operates within a VCC supply voltage range of 2.3V to 3.6V and supports bidirectional data flow with near-zero propagation delay (0.12ns typical). The device features high-bandwidth data paths up to 500MHz and low ON-state resistance (4Ω typical). Data I/Os support 0V to 5V signaling levels, while control inputs are compatible with TTL or 5V/3.3V CMOS outputs. It utilizes a charge pump for rail-to-rail switching and includes undershoot clamp diodes on data and control inputs.
Feature Summary
- High-bandwidth data path supporting broadband communications
- Low and flat ON-state resistance characteristics over operating range
- 5V tolerant I/Os with powered-off protection for partial-power-down mode
- Rail-to-rail switching capability on data input/output ports
Applications
- PCI Interface
- Differential Signal Interface
- Memory Interleaving
- Bus Isolation
- Low-Distortion Signal Gating
Procurement Notes
Verify the specific package type and suffix against official documentation before procurement. Confirm moisture sensitivity level and reflow temperature profiles match assembly requirements. Ensure ESD handling procedures comply with JESD standards during manufacturing. Cross-reference ordering information with current TI product folders to confirm active status and availability.
Selection Notes
Select this component for applications requiring high-speed signal gating and isolation in low-voltage systems. Consider its 5V tolerance when interfacing with mixed-voltage buses. Evaluate thermal impedance values relative to PCB layout constraints. Verify that control input logic levels align with system drivers for reliable enable/disable operations.
Part Context
This device belongs to the SN74CB3Q3245 family, designed as a high-performance solution for data-intensive computing and networking systems. It replaces older technologies like IDTQS3VH384 with improved bandwidth and lower power consumption. The RGY variant specifically denotes a 20-pin VQFN package optimized for compact surface-mount designs.
Replacement Considerations
Officially equivalent to the IDTQS3VH384 device. Check for alternative packages such as DBQR, DGVR, or PWR if pin compatibility differs. Verify functional equivalence regarding voltage ranges and switching speeds when substituting.
