Overview
The CDC208DW, produced by Texas Instruments, is a dual 1-to-4 clock driver integrated circuit designed for high-performance clock distribution applications. This device features two independent clock-driver circuits, each capable of fanning out one input signal to four outputs with minimal skew. The CDC208DW is packaged in a 20-pin Plastic Small-Outline (DW) package and is characterized for operation over a temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5 | 5.5 | V |
| High-Level Input Voltage (VIH) | - | - | 2 | V |
| Low-Level Input Voltage (VIL) | - | - | 0.8 | V |
| Input Transition Rise or Fall Rate (∆t/∆v) | - | - | 10 | ns/V |
| Input Clock Frequency (fclock) | - | - | 60 | MHz |
| Operating Free-Air Temperature (TA) | -40 | - | 85 | °C |
| Propagation Delay (tPLH, tPHL) | 6.6 | - | 10.2 | ns |
| Output Skew (tsk(o)) | 1 | - | - | ns |
| High-Level Output Current (IOH) | -24 | - | - | mA |
| Low-Level Output Current (IOL) | 24 | - | - | mA |
Key Features
- Low-Skew Propagation Delay Specifications for Clock-Driver Applications
- TTL-Compatible Inputs and CMOS-Compatible Outputs
- Flow-Through Architecture Optimizes PCB Layout
- Center-Pin VCC and GND Pin Configurations Minimize High-Speed Switching Noise
- EPIC (Enhanced-Performance Implanted CMOS) 1-µm Process
- 500-mA Typical Latch-Up Immunity at 125°C
- Two Output-Enable Inputs for Each Circuit to Control Output States
Applications
The CDC208DW is suitable for various high-speed clock distribution applications, including:
- Computer Systems and Peripherals
- Telecommunications Equipment
- Networking Devices
- Embedded Systems Requiring Precise Clock Signals
- High-Performance Data Acquisition and Processing Systems
Q & A
- What is the primary function of the CDC208DW?
The CDC208DW is a dual 1-to-4 clock driver that fans out one input signal to four outputs with minimal skew for clock distribution.
- What is the operating temperature range of the CDC208DW?
The CDC208DW operates over a temperature range of -40°C to 85°C.
- What package type is the CDC208DW available in?
The CDC208DW is available in a 20-pin Plastic Small-Outline (DW) package.
- What are the key features of the CDC208DW?
The CDC208DW features low-skew propagation delay, TTL-compatible inputs, CMOS-compatible outputs, flow-through architecture, and center-pin VCC and GND configurations.
- How does the CDC208DW minimize high-speed switching noise?
The CDC208DW minimizes high-speed switching noise through its center-pin VCC and GND pin configurations.
- What is the typical latch-up immunity of the CDC208DW at 125°C?
The CDC208DW has a typical latch-up immunity of 500 mA at 125°C.
- Can the outputs of the CDC208DW be controlled independently?
Yes, each circuit has two output-enable inputs (OE1 and OE2) that can force the outputs to a high-impedance state or to a high or low logic level.
- What is the maximum input clock frequency for the CDC208DW?
The maximum input clock frequency for the CDC208DW is 60 MHz.
- What is the propagation delay of the CDC208DW?
The propagation delay (tPLH, tPHL) of the CDC208DW is between 6.6 ns and 10.2 ns.
- What are some typical applications of the CDC208DW?
The CDC208DW is used in computer systems, telecommunications equipment, networking devices, embedded systems, and high-performance data acquisition and processing systems.
