SL28SRC01

DOC#: SP-AP-0015 (Rev. 0.2)

Page 3 of 11

capacitors are calculated to provide equal capacitive loading

on both sides.

,

Use the following formulas to calculate the trim capacitor

values for Ce1 and Ce2 .

CL....................................................Crystal load capacitance

CLe......................................... Actual loading seen by crystal

using standard value trim capacitors

Ce..................................................... External trim capacitors

Cs..............................................Stray capacitance (terraced)

Ci ...........................................................Internal capacitance

(lead frame, bond wires, etc.)

XTAL

Ce 2

Ce 1

Cs 1

Cs 2

X1

X2

Ci1

Ci2

Clo c k Ch ip

Tra c e

2.8pF

Trim

33pF

Pin

3 to 6p

Figure 2. Crystal Loading Example

F

Load Capacitance (each side)

Total Capacitance (as seen by the crystal)

Ce = 2 * CL - (Cs + Ci)

Ce1 + Cs1 + Ci1

1

+

Ce2 + Cs2 + Ci2

1

()

1

=

CLe

Absolute Maximum Conditions

Parameter

Description

Condition

Min.

Max.

Unit

Core Supply Voltage

–

4.6

V

Input Voltage

–0.5

4.6

Temperature, Storage

Non-functional

–65

150

°C

Temperature, Operating

Ambient, Commercial

Functional

0

85

°C

Temperature, Operating

Ambient, Industrial

Functional

-40

85

°C

Temperature, Junction

Functional

–

150

°C

Dissipation, Junction to Case

JEDEC (JESD 51)

–

20

°C/

W

Dissipation, Junction to Ambient JEDEC (JESD 51)

–

60

°C/

W

ESD Protection (Human Body

Model)

JEDEC (JESD 22 - A114)

2000

–

V

UL-94

Flammability Rating

UL (Class)

V–0

DC Electrical Specifications

Parameter

Description

Condition

Min.

Max.

Unit

VDD

3.3V Operating Voltage

3.3 ± 5%

3.135

3.465

V

3.3V Input High Voltage

2.0

3.3V Input Low Voltage

0.8

V

Input High Leakage Current

–5

A

Input Low Leakage Current

–5

–

A

3.3V Output High Voltage

2.4

–

V

3.3V Output Low Voltage

–

0.4

V

High-impedance Output

Current

–10

10

A