SNAS636C
December 2013 – July 2021
LMK00338
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Parameter Measurement Information
7.1
Differential Voltage Measurement Terminology
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Crystal Power Dissipation vs. RLIM
8.3.2
Clock Inputs
8.3.3
Clock Outputs
8.3.3.1
Reference Output
8.4
Device Functional Modes
8.4.1
VCC and VCCO Power Supplies
9
Power Supply Recommendations
9.1
Current Consumption and Power Dissipation Calculations
9.1.1
Power Dissipation Example: Worst-Case Dissipation
9.2
Power Supply Bypassing
9.2.1
Power Supply Ripple Rejection
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Thermal Management
11
Device and Documentation Support
11.1
Documentation Support
11.1.1
Related Documentation
11.2
Receiving Notification of Documentation Updates
11.3
Support Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
Package Options
Mechanical Data (Package|Pins)
RTA|40
MPQF134A
Thermal pad, mechanical data (Package|Pins)
RTA|40
QFND447B
Orderable Information
snas636c_oa
snas636c_pm
10.1
Layout Guidelines
For DC-coupled operation of an HCSL driver, terminate with 50 Ω to ground near the driver output as shown in
Figure 10-1
.
Keep the connections between the bypass capacitors and the power supply on the device as short as possible
Ground the other side of the capacitor using a low impedance connection to the ground plane
If the capacitors are mounted on the back side, 0402 components can be employed; however, soldering to the Thermal Dissipation Pad can be difficult
For component side mounting, use 0201 body size capacitors to facilitate signal routing