SMD Crystal Oscillators POSC2520

A 38 kHz crystal oscillator generates a clock signal with a frequency of 38 kilohertz (kHz). This specific frequency is commonly used in various applications, including remote control systems, infrared (IR) communication, and other timing-sensitive electronics.Infrared remote controls often use a 38 kHz carrier frequency to modulate signals for transmitting commands to devices like TVs, DVD players, and audio systems.

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Features

2520 size, 0.8mm high. Ultra miniature and lightweight SMD SPXO

3-state function

EC-Q 100 compliant

Supply Voltage: 1.8V/ 2.5V/ 2.8V/ 3.0V/ 3.3V

Available frequency range: 0.584375~80MHz

Available up to 80MHz by using AT cut fundamental resonator

Low jitter provides for high performance

Applications

PC, PDA, PND, DSC, DVD, DVC, HDD

Smartphone, WiLAN, WiMAX, Bluetooth

PC peripherals gaming equipment

Wearable devices

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Typical 2.5×2.0×0.85 mm ceramic SMD crystal oscillator

tight symmetry(45 to 55%)available
operation voltage: 1.8V,2.5V,3.3V; Tri-state enable/disable
Typical application: WLAN/WiMax,Mobile phone,DSC,Set-top box,HDTV

Electrical Parameters

No.	Item	Symb.	Electrical Specification				Remark
No.	Item	Symb.	Min.	Type	Max.	Units	Remark
1	Nominal Frequency	F0	32			MHz
2	Frequency Stability		-30		30	ppm	All condition*
3	Operating Temperature Range	TOPR	-40		85	℃
4	Storage Temperature	TSTG	-55		125	℃
5	Power supply Voltage	VDD	2.97	3.3	3.63	V
6	Aging Per Year	Fa	-5		5	ppm	First Year
7	Supply current	Ic			30	mA
8	Output symmetry	Sym	40		60	%
9	Rise time	Tr			7	ns	10%~90%VDD
10	Fall time	Tf			7	ns	90%~10%VDD
11	Output voltage	VOH	90%			VDD
		VOL			10%	VDD
12	Output load HCMOS LOAD				15	PF
13	Start up time				10	mS
14	Pin 1, tri-state function	pin 1=H or open......output active at pin 3
14	Pin 1, tri-state function	pin 1=L......high impedance at pin 3
15	Package type	POSC2520

Dimensions

Reflow

Profiles Feature	Pb-Free Assembly
Average Ramp-up Rate (Ts max to Tp)	3℃/second max.
Preheat ■ Temperature Min (Ts min) ■ Temperature Max (Ts max) ■ Time (ts min to ts max)	125℃ 200℃ 60~180 seconds
Time maintained above ■ Temperature (TL) ■ Time (tL)	217℃ 60~150 seconds
Peak/Classification Temperature (Tp)	260℃
Time within 5℃ of actual Peak Temperature (tp)	20~40 seconds
Ramp-down rate	6℃/second max.
Time 25℃ to Peak Temperature	8 minutes max.
Suggest reflow times	3 Times max

FAQ:

How does A-Crystal support you: Free samples , OEM, Reliability test report, Product return report (8D report), RoHS substances compliant, REACH substances compliant
What’s A Crystal’s performance Certificate?ISO 9001 quality management [9001 ISO 2015], ISO14001
How many Production patents A Crystal has: 16
Payment terms: T/T in advance
Which express service: DHL, UPS, TNT, FedEx
A Crystal’s monthly production capacity for 32.768 oscillators: 1kk
What’s the MOQ/Standard packing quantity: 3k per reel ( a crystal 32.768)
Lead Time for the 32.768 khz clock oscillator: 3days-14days
A Crystal produces tuning fork crystals with 32.768 khz xtl.
Factory address: 32th Building, A District, Feiyue Technology Innovation Park, Jiaojiang, Taizhou, Zhejiang, China. ZIP:318014
What is the lead time for:

Series Product	Quartz crystal size	Lead Time
HC49 Series	HC-49SMD,HC-49S,HC-49U	1-2 weeks
SMD quartz Crystals	2012/2016/2520/3225/5032/6035/7050/8045	1-4 weeks
SMD crystal Oscillators	2016/2520/3225/5032/7050	1-3 weeks
TCXO	2520/3225/5032	2-5 weeks
SMD Watch/tuning fork Crystals	PSX315/PSX415/PSX519/PMX145/PMX206/PMX206F/PMX206FA/PMX405/PMX406	1-2 weeks
VCXO	2520/3225/5032	2-5weeks
TCVCXO	2520/3225/5032	2-5weeks
DIP Watch/tuning fork Crystals	DT206/DT308	1-2weeks
ZTA/ZTT Series	ZTTCC/ZTACC/	1-2weeks

12.Free crystal samples and shipment fee ?

We provide you 20pcs free quartz crystals samples [no free samples for oscillators and TCXO,VCXO, and VCTCXO]. Customers to pay only the shipping fees.

What basic information to provide when ordering a crystal?

SMD or DIP	Crystal package size[mm]	2pads ,3pads or 4pads...
Frequency: GHz,MHz or KHz	frequency tolerance[ppm]	frequency characteristics over temperature[ppm]
load capacitance[pF]	operating temperature[℃]	resistance(ESR)[Ω/㏀]
Supply Voltage[V]	Output type	application

Main sources of A Crystal component parts

Crystal Bar	China
Base	NEC (Japan)
Outer covering	NEC (Japan)
Resin	HENKEL (Germany)
High-temperature crystal	KDS (Japan)

15. DIP cylinder crystal Production & Test Equipment

Equipment Name	Manufacturer	Quantity	Purpose
Coaters	Korea	3	put the silver on the tuning fork tips
Auto Dispensing	Japan	5	Stick the crystal on base
Fine tuning	China	32	Frequency modulation and control
Welding	China	12	To weld the outer covering and base
Laser Marking	China	3	Marking on the outer covering
250B	USA	3	Test the frequency
High and low temperature testing	USA	3	High and low temperature testing
Automatic testing	China	8	Test the crystal
Insulated resistance tester	China	6	Test the crystal

PMX145/206/308SMD Production & Test Equipment

NO.	Use process	Equipment Name	Model	manufacturer	Unit	Quantity
1	Pin bending	Auto pin bending	DT206/308	CHINA	PCS	2
2	Pin cutting	Auto pin cutting	DT308/206	CHINA	PCS	6
3	Spot welding	spot welding	SW-Ⅱ	CHINA	PCS	16
4	Spot welding	Auto spot welding	SW-300(refit )	CHINA	PCS	2
5	Plastic package	HF Preheat machine	HDP-320	CHINA	PCS	4
6	Plastic package	hydraulic machine	MP-125	CHINA	PCS	4
7	Orthopedic	Hydraulic Presses	YN-12	CHINA	PCS	10
8	Marking	Laser Marking	YAG-M-50	CHINA	PCS	5
9	Testing equipment	Clock Tester	QWA-5A	CHINA TW	PCS	1
10		Crystal impedance meter	FT-327B	CHINA	PCS	20
11		network analyzer	250B	USA	PCS	3
12		Frequency meter	FT-100T	CHINA	PCS	15
13		Automatic testing	BJ-308/206	CHINA	PCS	20
14		crystal calibration	GY3020	CHINA TW	PCS	1
15		Crystal impedance meter	CZ-5C	CHINA TW	PCS	1
16		Spectrometer	ZDX8600	CHINA TW	PCS	1
17		Reflow	T1000	CHINA	PCS	1
18		Insulated resistance tester	TH3681A	CHINA TW	PCS	1
19		Incubator	4310	USA	PCS	4
20	Taping	Auto Taping	PMX206	CHINA	PCS	9

Quality Management

Ø A-crystal supports its customer base through the pursuit of continuous quality improvement.

Ø World-Class leading product designs.

Ø ISO-9001 certified production and Quality management

Ø Reliability testing for all products to ensure quality stability.

Ø Strict quality evaluation of all raw material suppliers

Ø Customers satisfaction feedback program for quality assurance

Ø Complete sales & after-sales quality service and customer care

Ø Regular employee training to achieve continuous quality improvement.

Management participation programs to promote commitment to highest quality standards and customer focus.

How’s a-crystal’s Customer Care: returns process

How to see a crystal production line radio on tube: https://www.acrystals.com/about-us_d1

How to attach a tuning fork to PCB/A crystal recommended Solder Reflow?

Soldering Characteristics

A variety of methods can be used to solder A-Crystal products to PCB and substrates

Ø Wave or Dual Wave

Ø Hot Air or Convection Flow

Ø Vapor Phase Reflow

Ø Infrared Reflow

Ø Bubble Solder Immersion

Ø Tohers (Laser,etc)

Model	Pre-heating time	Reflow Temperature	Reflow time
SMD Tuning fork 01(lead free)	60-120 Seconds	230℃ Max	10 Seconds Max
SMD Tuning fork 02(no lead free for solder, but ROHS compliant)	30-60 Seconds	260℃ Max	10 Seconds Max
HC-49U	30-60 Seconds	250℃ Max	10 Seconds Max
HC-49S series	30-60 Seconds	250℃ Max	10 Seconds Max
HC-49SM series	30-60 Seconds	250℃ Max	10 Seconds Max
UM series	30-60 Seconds	250℃ Max	10 Seconds Max
SMD crystal units	30-60 Seconds	250℃ Max	10 Seconds Max
Clock Oscillator	30-60 Seconds	250℃ Max	5 Seconds Max
VCXO	30-60 Seconds	250℃ Max	5 Seconds Max
SMD oscillator	30-60 Seconds	260℃ Max	10 Seconds Max
Ceramic Resonator	30-60 Seconds	225℃ Max	10 Seconds Max
Ceramic Filter	30-60 Seconds	225℃ Max	10 Seconds Max

What’s the pictures of the A crystal time quartz watch XTAL/ timing oscillator/tuning fork resonator?

Package:

Package is made of corrugated paper with thickness of 0.8cm.

Each Package contains 10 inner boxes, each box has 1 plastic reel

Each reel has 3000 pieces of Crystal Resonators

Therefore Total package contains 30,000 pieces of crystal resonators.

Large package contains 20 inner boxes （60, 000 pieces of crystal resonators）

Why A Crystal?

Pricing: Highly competitive pricing

Quality: ISO 9001 certified quality system and knowledgeable quality assurance team.

Delivery : Short lead-time for standard products and on time delivery for customized products.

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POSC2520