ISM91-2465AH-20.000 datasheet, PDF

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ISM91-2465AH-20.000: DescriptionHCMOS/TTL Output Clock Oscillator, 20MHz Nom, SMD, 4 PIN; CategoryPassive components oscillator; File Size51KB，2 Pages; ManufacturerILSI; Websitehttp://www.ilsiamerica.com; Environmental Compliance

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ISM91-2465AH-20.000 Overview

HCMOS/TTL Output Clock Oscillator, 20MHz Nom, SMD, 4 PIN

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5 mm x 7 mm Ceramic Package SMD Oscillator, TTL / HC-MOS

ISM91 Series

Product Features:

Low Jitter, Non-PLL Based Output

CMOS/TTL Compatible Logic Levels

Compatible with Leadfree Processing

Applications:

Fibre Channel

Server & Storage

Sonet /SDH

802.11 / Wifi

T1/E1, T3/E3

System Clock

Frequency

Output Level

HC-MOS

TTL

Duty Cycle

Rise / Fall Time

Output Load

Frequency Stability

Start-up Time

Enable / Disable

Time

Supply Voltage

Current

Operating

Storage

Jitter:

RMS(1sigma)

1 MHz-75 MHz

76 MHz-170 MHz

Max Integrated

1 MHz-75 MHz

76 MHz-170 MHz

Max Total Jitter

1 MHz-75 MHz

76 MHz-170 MHz

1 MHz to 170.000 MHz

‘0’ = 0.1 Vcc Max., ‘1’ = 0.9 Vcc Min.

‘0’ = 0.4 VDC Max., ‘1’ = 2.4 VDC Min.

Specify 50% ±10% or ±5% See Table in Part Number Guide

5 nS Max. @ Vcc = +3.3 VDC, 10 nS Max. @ Vcc = +5 VDC ***

Fo < 50 MHz = 10 TTL, Fo > 50 MHz = 5 LSTTL See Table in Part

Number Guide

See Frequency Stability Table (Includes room temperature tolerance and

stability over operating temperature)

10 mS Max.

100 nS Max.

See Input Voltage Table, tolerance ±5 %

70 mA Max. ***

See Operating Temperature Table in Part Number Guide

-55

C to +125

Recommended

Pad Layout

(Top View)

5 pS RMS (1 sigma) Max. accumulated jitter (20K adjacent periods)

3 pS RMS (1 sigma) Max. accumulated jitter (20K adjacent periods)

1.5 pS RMS (1 sigma -12KHz to 20MHz)

1 pS RMS (1 sigma -12KHz to 20MHz)

50 pS p-p (100K adjacent periods)

30 pS p-p (100K adjacent periods)

Connection

Enable / Disable

Ground

Output

Vdd

Dimension Units: mm

Part Number Guide

Package

Input

Voltage

5 = 5.0 V

3 = 3.3 V

7 = 3.0 V

2 = 2.7 V

6 = 2.5 V

1 = 1.8 V*

Sample Part Number:

Operating

Temperature

1 = 0° C to +70° C

6 = -10° C to +70° C

3 = -20° C to +70° C

4 = -30° C to +75° C

2 = -40° C to +85° C

ISM91 - 3251BH - 20.000

Output

1 = 10TTL / 15 pF HC-MOS

5 = 50 pF HC-MOS (<40 MHz)

6 = 30 pF

Symmetry

(Duty Cycle)

5 = 45 / 55 Max.

6 = 40 / 60 Max.

Stability

(in ppm)

**E =

±10

**D =

±15

**F =

±20

A =

±25

B =

±50

C =

±100

Enable /

Disable

H = Enable

O = N/C

Frequency

SM91 -

- 20.000 MHz

NOTE: A 0.01 µF bypass capacitor is recommended between Vcc (pin 4) and GND (pin 2) to minimize power supply noise.

* Not available at all frequencies. ** Not available for all temperature ranges. *** Frequency, supply, and load related parameters.

ILSI

America

Phone: 775-851-8880 • Fax: 775-851-8882• e-mail: e-mail@ilsiamerica.com • www.ilsiamerica.com

06/09_B

Specifications subject to change without notice

Page 1

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