Overview
The SN74CB3Q16245DGGR is a 16-bit FET bus switch produced by Texas Instruments. It is part of the Widebus™ family and is designed for high-bandwidth applications. This device utilizes a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance. This feature allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The SN74CB3Q16245 is suitable for various high-speed data transmission and switching applications, including broadband communications, networking, and data-intensive computing systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage Range | -0.5 | 4.6 | V | |
| VIN Control Input Voltage Range | -0.5 | 7 | V | |
| VI/O Switch I/O Voltage Range | -0.5 | 7 | V | |
| Operating Free-Air Temperature | -40 | 85 | °C | |
| ON-State Switch Current | ±64 | mA | ||
| Package Thermal Impedance (θJA) | 70 | °C/W (DGG package) | ||
| Control Input Capacitance | 3.5 | 5 | pF | |
| Switch OFF Capacitance | 4 | 6 | pF | |
| Switch ON Capacitance | 10 | 13 | pF |
Key Features
- High-bandwidth data path (up to 500 MHz)
- 5-V tolerant I/Os with device powered up or down
- Low and flat ON-state resistance (ron) for minimal propagation delay
- Low data I/O capacitance to minimize capacitive loading and signal distortion
- Supports rail-to-rail switching on the data input/output (I/O) ports
- Control inputs can be driven by TTL or 5-V/3.3-V CMOS outputs
- Ioff supports partial-power-down mode operation
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD performance tested per JESD 22 – 2000-V Human-Body Model (A114-B, Class II) – 1000-V Charged-Device Model (C101)
- Organized as two 8-bit bus switches with separate output-enable (1OE, 2OE) inputs
Applications
- Broadband communications
- Networking
- Data-intensive computing systems
- PCI interface
- Differential signal interface
- Memory interleaving
- Bus isolation
- Low-distortion signal gating
Q & A
- What is the SN74CB3Q16245DGGR used for?
The SN74CB3Q16245DGGR is a 16-bit FET bus switch used for high-bandwidth applications, including broadband communications, networking, and data-intensive computing systems.
- What is the operating voltage range of the SN74CB3Q16245DGGR?
The operating voltage range is from 2.7 V to 3.6 V.
- What is the maximum ON-state switch current?
The maximum ON-state switch current is ±64 mA.
- How many bits does the SN74CB3Q16245DGGR switch support?
The device supports 16 bits, organized as two 8-bit bus switches.
- What is the purpose of the output-enable (OE) inputs?
The output-enable (OE) inputs control the state of the bus switch. When OE is low, the associated 8-bit bus switch is ON, and when OE is high, the switch is OFF.
- What are the package options for the SN74CB3Q16245?
The device is available in TSSOP (DGG), TVSOP (DGV), and SSOP (DL) packages.
- What is the thermal impedance of the DGG package?
The thermal impedance (θJA) of the DGG package is 70 °C/W.
- Does the SN74CB3Q16245 support partial-power-down mode?
Yes, the device supports partial-power-down mode operation using Ioff circuitry.
- What is the ESD performance of the SN74CB3Q16245?
The device has been tested for ESD performance per JESD 22 – 2000-V Human-Body Model (A114-B, Class II) and 1000-V Charged-Device Model (C101).
- What are some common applications of the SN74CB3Q16245?
Common applications include PCI interface, differential signal interface, memory interleaving, bus isolation, and low-distortion signal gating.
