Oscillator JT21ET(E) · TCXO

- temp. compensated crystal oscillator, 2.0 x 1.6 mm

- low power TCXO with clipped sine output

- wide temperature range up to -40 °C ~ +105 °C

- optional standby function for JT21ETE

- for navigation system use, please prefer JT21G

RoHS

2015/863/EU

RoHS compliant

Pb free

Conflict

mineral free

REACH

compliant

GENERAL DATA

TYPE

JT21ET / JT21ETE TCXO

frequency range

12.0 ~ 52.0 MHz

frequency

tolerance /

stability

at +25 °C

± 2.0 ppm (incl. 2x reflow)

temperature

±2.0 ppm ~ ±10.0 ppm (see table 1)

aging first year

± 1.0 ppm (at +25 °C)

supply voltage

± 0.2 ppm (at V

DC ±5%)

load change

± 0.2 ppm (at nominal load ± 10%)

current consumption

1.5 mA max. ≤ 26 MHz / 2.5 mA max. ≤ 52 MHz

supply voltage V

DC

1.8V / 2.5V / 2.8V / 3.0V / 3.3V (±5%)

temperature operating

see table 1

storage

-40 °C ~ +105 °C

output

load nom.

10 k� // 10 pF

level min.

0.8 x Vpp (clipped sine)

standby function of JT21ETE

stop function, see table 2

disabled supply current

2µA typ. / 5.5 µA max.

start-up time max.

2.5 ms

enable time max.

2.5 ms

disable time max.

150 ns

phase jitter

at 100 Hz

-122dBc/Hz typ.

at ƒo

at 1 KHz

-142 dBc/Hz typ.

26 Mhz

at 10 KHz

-155 dBc/Hz typ.

TABLE 2: ENABLE / DISABLE FUNCTION

PIN #1 (E/D CONTROL)

PIN #3 (OUTPUT)

high “1” (V

IH ≥ 0.8 VDC)

active (see information below)

low “0” (V

IL ≤ 0.2 VDC)

high impedance

stop function (JT21ETE only):

– oscillator stops

– output high impedance

– to activate permanently, please connect an external pull-up resistor

of 10 kOhm to pin #1

NOTE

– TCXO JT21ET: pin #1 to be connected to GND

– TCXO JT21ETE: pin #1 controls the standby function

– external AC coupling for output recommended

* other nominal supply voltages within 1.8 V ~ 3.3 V need to be specified,

ask for availability

2.0±0.15

# 1# 2

# 4# 3

0.65

0.95

1.14

0.43

# 1# 2

# 4# 3

±0.05

±0.05

top view

side view

bottom view

pad layout

pin connection

DIMENSIONS

TCXO

JT21ET

# 1: GND

# 2: GND

# 3: output

# 4: V

DC

TCXO

JT21ETE

# 1: e/d

# 2: GND

# 3: output

# 4: V

DC

in mm

actual size

28042022

Jauch Quartz GmbH • e-mail: info@jauch.com • full data can be found under: www.jauch.com

All specifications are subject to change without notice

TABLE 1: FREQUENCY STABILITY VS. TEMPERATURE

frequency stability

temperature code

B

± 2.0 ppm

A

± 2.5 ppm

Y

± 5.0 ppm

X

± 10.0 ppm

-40 °C ~ +85 °C

K

△





-40 °C ~ +105 °C

P







 

on request

△ case-by-case, ask if available

O

Oscillator

frequency

12.0 ~ 52.0 MHz

type

JT21ET = TCXO

JT21ETE = TCXO

with e/d

supply voltage

Example: O 48.0-JT21ET-Y-P-3.3-LF (Suffix LF = RoHS compliant / Pb free)

frequency stability

code

A, B, X, Y

see table 1

operating temp.

code

K = -40 °C ~ +85 °C

P = -40 °C ~ +105 °C

see table 1

ORDER INFORMATION

1.8 = 1.8 V

2.5 = 2.5 V

2.8 = 2.8 V

3.0 = 3.0 V

3.3 = 3.3 V