S1K50000 Epson Electronics America, Inc., S1K50000 Datasheet - Page 53

• Manufacturer Part Number: S1K50000
• Description: Design Guide S1k50000 Series
• Manufacturer: Epson Electronics America, Inc.

Chapter 3: Types of Input/Output Buffers and Usage Precautions
3.3.2 Precautions on the Use of Oscillator Circuits
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(1) Pin arrangement
(2) Guide to selection of the oscillator cell
(3) Setting external resistor and capacitor values
(4) Guaranteed level
(5) Oscillator-circuit configuration with dual power supplies
• Position the oscillator circuit’s input/output pins adjacent to each other, and position the
• Do not position other output pins adjacent to the oscillator circuit’s input/output pins. In
• Try to position the oscillator circuit’s input/output pins as close to the center as possible
The possible oscillation frequencies are on the order of several 10 kHz to several 10 MHz.
For details, contact Seiko Epson or its distributor.
The oscillation characteristics depend on the various components (IC, X’tal, Rf, Rd, Cg, Cd,
and the circuit board) that comprise the circuit. Therefore, be sure to choose the most
suitable values for Rf, Rd, Cg, and Cd after carefully evaluating the performance of each
part while mounted on the actual board.
The oscillation characteristics depend on the various components (IC, X’tal, Rf, Rd, Cg, Cd,
and the circuit board) that comprise the circuit. Therefore, Seiko Epson cannot guarantee
the operation and characteristics of the oscillator. Customers are requested to verify the
oscillation characteristics by performing careful evaluation using an ES sample.
The oscillator-circuit configuration in this case is basically the same as in the case of a
single-power-supply configuration. Because the oscillator cell is connected to the LV
system power supply, use the input and output cells labeled “XLLIN” and “XLLOT,” with the
letter “L” prefixed to XLIN and XLOT.
power-supply pins (V
particular, outputs in phase or out of phase with the oscillator’s waveform cannot be posi-
tioned close to the input/output pins. Make sure these outputs are positioned on the
opposite side of the package.
on the side of the package.
DD
and V
SS
) on either side of those input/output pins.
EPSON
STANDARD CELL S1K50000 SERIES
DESIGN GUIDE
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