MEMS Oscillator, High Temperature, LVCMOS/HCMOS Compatible, 115.19401 MHz to 137.000MHz

IM821 Series

ILSI America Phone 775-851-8880 ● Fax 775-851-8882 ●email: e-mail@ilsiamerica.com ●

www.ilsiamerica.com

Specifications subject to change without notice

Rev 01/30/16_A

Page 5 of 9

Pin Functionally

Pin Description

Pin

Symbol

Functionality

Pin Assignments

1

OE

Tri-state

High or Open = specified frequency output

Low = Output is high impedance, only output is disabled.

1

4

3

2

Top View

GND

Vdd

OUT

OE

ST

N/C

ST

Standby

High or Open = specified frequency output.

Low = Output is low. Device goes to sleep mode. Supply current

reduces to standby current.

N/C

No Connect

Any voltage between 0.0 V to Vdd or Open = specified frequency

output

Pin 1 has no functiion

2

GND

Power

Electrical ground

3

Out

Output

Oscillator output

4

Vdd

Power

Power supply voltage

Notes:

1.

In OE or

ST mode, a pull-up resistor of 10.0 kΩ or less is recommended if Pin 1 is not externally

driven. If Pin 1 needs to be left floating, use the NC option.

2.

A capacitor of value 0.1 µF or higher between Pin 4 (Vdd) and Pin 1 (GND) is required.

Pin 1 Configuration Options (OE, or

, or NC)

Output Enable (OE) Mode

In the OE mode, applying logic Low to the OE pin only disables the output driver and puts it in Hi-Z mode. The core of the device

continues to operate normally. Power consumption is reduced due to the inactivity of the output. When the OE pin is pulled High, the

output is typically enabled in <1 µSec.

Standby

Mode

In the ST mode, a device enters into the standby mode when Pin 1 pulled Low. All internal circuits of the device are turned off. The

current is reduced to a standby current, typically in the range of a few µA. When ST is pulled High, the device goes through the

“resume” process, which can take up to 5 mSec.

No Connect (NC) Mode

In the NC mode, the device always operates in its normal mode and outputs the specified frequency regardless of the logic level

on Pin 1.

Table 1 below summarizes the key relevant parameters in the operation of the device in OE, ST, or NC mode.

Parameters

OE

ST

NC

Active current 20.0 MHz (max +1.80 VDC)

6.0 mA

6.0 mA

6.0 mA

OE disable current (max +1.80 VDC)

4.5 mA

N/A

N/A

Standby current (typical +1.80 VDC)

N/A

0.6 µA

N/A

OE enable time at 20.0 MHz (max)

200 nSec

N/A

N/A

Resume time from standby

(max, all frequency)

N/A

5 mSec

N/A

Output driver in OE disable/standby mode

High Z

N/A

Table 1 OE vs.

vs. NC