For Internet of Things (IoT) applications there are needs of running the MCU at both high speed and low speed clocks. Typical frequencies like 16.0 / 24.0 / 32.0 / 40.0 MHz and 32.768 KHz are widely used by wireless communications such as Bluetooth Smart, Bluetooth Low Energy (BLE), WiFi, ZigBee and sub-GHz RF. HKC offers a full series of reliable frequency products that are optimized for IoT applications.

Here are a few examples, which quotes fit for which ICs. More information is available with the link to the manufacturer page.

Link to manufacturer page

 Data sheet

CT family
1,2 x 1,6 x 0,4 mm
24 MHz - 60 MHz
4-Pad ceramic body with metal lid

The standard packing unit is 3.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

List of prefered types with technical datas:

HKC1612SX-24MHz-26868-R4V1, 20/20/-20+70/8, 150Ω, 200uW
HKC1612SX-25MHz-26872-R4V1, 20/20/-20+70/8, 150Ω, 200uW
HKC1612SX-26MHz-26873-R4V1, 10/10/-20+70/8, 150Ω, 100uW
HKC1612SX-26MHz-26874-R4V1, 15/15/-20+70/8, 150Ω, 100uW
HKC1612SX-27MHz-26875-R4V1, 20/30/-20+70/8, 150Ω, 200uW
HKC1612SX-30MHz-26876-R4V1, 20/30/-40+85/10, 150Ω, 200uW
HKC1612SX-32MHz-26877-R4V1, 10/10/-20+70/8, 150Ω, 100uW
HKC1612SX-32MHz-26878-R4V1, 10/20/-20+70/8, 150Ω, 100uW
HKC1612SX-40MHz-26879-R4V1, 10/15/-30+85/8, 80Ω, 100uW

 Data sheet

CQ family
1,6 x 2,0 x 0,45 mm
12 MHz - 72 MHz
4-Pad ceramic body with metal lid

The standard packing unit is 3.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

List of prefered types with technical datas:

HKC2016SX-16MHz-26852-R4V1, 10/15/-30+85/8, 200Ω, 100uW
HKC2016SX-20MHz-26853-R4V1, 10/10/-20+70/8, 200Ω, 100uW
HKC2016SX-24MHz-26854-R4V1, 10/20/-40+85/8, 100Ω, 100uW
HKC2016SX-25MHz-26855-R4V1, 10/10/-20+70/8, 120Ω, 100uW
HKC2016SX-26MHz-26856-R4V1, 10/15/-10+75/8, 80Ω, 100uW
HKC2016SX-26MHz-26857-R4V1, 10/10/-20+70/8, 100Ω, 100uW
HKC2016SX-27MHz-26858-R4V1, 10/10/-20+70/8, 100Ω, 100uW
HKC2016SX-30MHz-26859-R4V1, 10/15/-10+75/8, 60Ω, 100uW
HKC2016SX-30.4MHz-26860-R4V1, 10/15/-10+75/8, 60Ω, 100uW
HKC2016SX-32MHz-26862-R4V1, 10/10/-20+75/8, 60Ω, 100uW
HKC2016SX-32MHz-26863-R4V1, 10/20/-40+85/8, 60Ω, 100uW
HKC2016SX-38.4MHz-26864-R4V1, 10/20/-40+85/10, 50Ω, 200uW
HKC2016SX-40MHz-26865-R4V1, 10/20/-40+85/8, 50Ω, 200uW
HKC2016SX-48MHz-26866-R4V1, 10/30/-40+85/10, 60Ω, 100uW
HKC2016SX-50MHz-26867-R4V1, 10/50/-40+85/10, 60Ω, 100uW

 Data sheet

CK family
2,0 x 2,5 x 0,6 mm
16 MHz - 50 MHz
4-Pad ceramic body with metal lid

The standard packing unit is 3.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

P7 family
2,5 x 3,2 x 0,8 mm
12 MHz - 50 MHz
4-pad ceramic body with ceramic lid (lead free glass frit)

The standard packing unit is 3.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

P8 family
1,5 x 3,2 x 0,8 mm
32,768 kHz
2-pad ceramic base with ceramic lid (lead free glass frit)

HKC crystals Low-cost

Dimensions: 3,2x1,5mm
Standard tolerance: ±20ppm @+25°C
Temperature range: -40/+85°C
Standard load capacity: 7.0pF, 9.0pF, 12.5pF

Designed for large volumes of more than 51.000 pieces, with 3.000 pieces per reel, these crystals are extremely cost effective.

 Data sheet

C7 family
2,5 x 3,2 x 0,8 mm
12 - 50 MHz
4-pad ceramic body with metal lid

The standard packing unit is 3.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

C1 family
2,5 x 4,0 x 1,0 mm
12 MHz - 32 MHz
4-pad ceramic base with metal lid

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

CE family
3,2 x 5,0 mm
12 MHz - 32 MHz
2-pad ceramic base with metal lid

*for better availability please consider the 4-pad-version CA in new designs*

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

P3 family
3,2 x 5,0 x 1,2 mm
8 MHz - 50 MHz
2-pad ceramic base with ceramic lid (lead free glass frit)

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

CA family
3,2 x 5,0 mm
12 MHz - 32 MHz
4-pad ceramic base with metal lid

Special recommendation for new development where a small SMD quartz crystal is required. This design is our cheapest among SMT ceramic package with quartz crystals and metal lid.

Standard specification:
Frequency tolerance ±30ppm @+25°C
Temperature tolerance ±50ppm in the operating temperature range
Operating temeperature range -20/+70°C or -40/+85°C

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

CC family
3,5 x 6,0 mm
AT-cut fundamental 7 MHz - 50 MHz
AT-cut 3rd overtone 40 MHz - 80 MHz
2-pad ceramic base with metal lid

*for better availability please consider the 4-pad-version C3 in new designs*

*Tip: In general, the design 3.2 x 5.0 mm is better available, at the same price!*

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

C3 family
3,5 x 6,0 mm
10 - 70 MHz
4-pad ceramic base with metal lid

C3 offers, in comparison with smaller sizes, low series resistance:
7,00 MHz- 8,00 MHz ... 180 Ω
8,01 MHz - 9,00 MHz ... 150 Ω
9,01 MHz - 10,00 MHz ... 100 Ω
10,01 MHz- 11,00 MHz ... 80 Ω
11,01 MHz- 12,00 MHz ... 50 Ω
12,01 MHz- 14,00 MHz ... 40 Ω
14,01 MHz- 50,00 MHz ... 30 Ω
40 MHz - 80 MHz ... 70 Ω (3rd overtone)

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

CG family
5,0 x 7,0 mm
6 MHz - 80 MHz
2-pad ceramic base with metal lid

*for better availability please consider the 4-pad-version C5 in new designs*

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

C5 family
5,0 x 7,0 mm
6 MHz- 80 MHz
4-pad ceramic base with metal lid

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

C9 family
4,5 x 8,0 mm
6 MHz - 80 MHz
2-pad ceramic base with metal lid

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

DE family
3,2 x 5,0 x 0,8 mm
8 MHz - 54 Hz
2-pad ceramic base with metal lid

HKC quartz crystals 3,2 x 5,0x1,0 mm in hybrid technology.
Designed for large volumes of more than 100.000 pieces, these crystals are extremely cost effective. The electrical specifications and reliability are at least equal to or better than those of comparable Crystals in glass frit and Seam-Seal housing

Standard tolerances: ±20ppm @+25°C, ±50ppm -40/+85°C

 Data sheet

P5 family
4,5 x 8,0 x 1,5 mm
AT-cut fundamental 6 MHz - 50 MHz
AT-cut 3rd overtone 26 MHz - 80 MHz
2-pad ceramic base with ceramic lid (lead free glass frit)

the series P5 is obsolete and not available any more. Please use the new type D9 instead.

 Data sheet

D9 family
4,5 x 8,0 x 1,5 mm
AT-cut fundamental 6 MHz - 50 MHz
AT-cut 3rd overtone 26 MHz - 80 MHz
2-pad version

 Data sheet

The cheapest SM-quartz crystal in the range from 3,2 MHz. Many frequencies as standard types in stock, delivery time for special specifications 5-6 weeks (July 2015).

Housing height from 2,75 mm possible:
S2 = 2,75mm >5 MHz/2,85mm <5MHz
S3 = 3,1mm
SS = 4,1mm (standard!)
S4 = 4,5mm

AT-cut fundamental 3,2 MHz - 40 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
BT-cut fundamental 27 MHz - 50 MHz

The standard packing unit is 1.500 pcs, if necessary also 2,000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

SM-quartz crystal in the range from 3,01 MHz with additional terminal pad for the mass housing

Housing height from 2,85 mm possible:
S2 = 2,85mm
S3 = 3,1mm
SS = 4,1mm (standard!)
S4 = 4,5mm

AT-cut fundamental 3,01 MHz - 50 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
BT-cut fundamental 27 MHz - 100 MHz

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

5,5 mm high
optional heights 4,0 mm and 4,5 mm

AT-cut fundamental 3,2 MHz - 40 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
BT-cut fundamental 27 MHz - 50 MHz

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

5,5 mm standard height
optional 4,0 and 4,5 mm available
on request case ground available

AT-cut fundamental 3,2 MHz - 40 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
BT-cut fundamental 27 MHz - 50 MHz
layout compatible with 86SMX

This version is not available any more, only stock volume is sold out. Improved replacement are the series F and E.

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

10,2 x 4,6 x 5,5 mm high (standard =FS/ES)
lower height 4,5 mm (F3/E3) and 4,2 mm (F2/E2) available
on request case ground optional (series E)

AT-cut fundamental mode 3,01 MHz - 50 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
BT-cut fundamental mode 27 MHz - 100 MHz
layoutkompatibel with 86SMX(MC) and Epson MA-406

Based on the metal can crystal style HC-49/US this crystal is unbeatable among all other SM-crystal styles in price and availability.

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

SMD Gullwing
AT-cut fundamental 1,84 MHz - 45 MHz
AT-cut 3rd overtone 20 MHz - 100 MHz
AT-cut 5th overtone 60 MHz - 120 MHz
BT-cut fundamental 24 MHz - 45 MHz

The standard packing unit is 1.000 pcs (reel). Smaller quantities are available on a piece of cut tape. On demand we put a pre- and endtape onto the piece and wind it on a mini-reel for your convenient handling in your production.

 Data sheet

3,5 mm high
body height starting from 2,6 mm
4,88 mm grid

AT-cut fundamental 3,2 MHz - 40 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
BT-cut fundamental 27 MHz - 50 MHz

also available with ground connection (3 wire at the bottom)

 Data sheet

13,2 mm high
lower heights possible starting 6,5 mm
4,88 mm grid

AT-cut fundamental 1,84 MHz - 45 MHz
AT-cut 3rd overtone 20 MHz - 100 MHz
BT-cut fundamental 24 MHz - 45 MHz

 Data sheet

tubular style d=3mm
body lenghts 8 / 9 / 10 mm, grid 1,1 mm
AT-cut fundamental 3,5 MHz - 32 MHz
AT-cut 3rd overtone 30 MHz - 70 MHz

 Data sheet

body height max. 8 mm
3,75 mm grid

AT-cut fundamental 3,5795 MHz - 50 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
AT-cut 5th overtone 60 MHz - 150 MHz
AT-cut 7th overtone 150 MHz - 200 MHz

also available with ground connection (3 wire at the bottom)

 Data sheet

body height max. 8 mm
3,75 mm grid

AT-cut fundamental 3,579545 MHz - 50 MHz
AT-cut 3rd overtone 26 MHz - 100 MHz
AT-cut 5th overtone 60 MHz - 150 MHz
AT-cut 7th overtone 150 MHz - 200 MHz