# Oscillator, 156.25 MHz, 50 ppm, LVPECL, 2.5 V, SMD, 2mm x 1.6mm, ClearClock AK1B Series

![Product image](https://novapart.co/image/farnell:4722633RL/)

**URL**: https://novapart.co/products/AK1BPBR1-156.2500T3/oscillator-15625-mhz-50-ppm-lvpecl-25-v-smd-2mm-x
**SKU**: AK1BPBR1-156.2500T3
**Manufacturer**: ABRACON
**Category**: Crystals & Oscillators || Oscillators || Standard Oscillators
**Price**: €3.5600
**Stock**: 10+
**Lead Time**: 120 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Frequency Stability + / - | 50ppm |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4722633RL/)

**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Description** 

Abracon’s AK1B offers the latest high frequency fundamental crystal technology, with exceptional phase noise performance, with a noise floor of -166 dBc/Hz at 156.250MHz. The Abracon AK1B is available with a compact 2.0 x 1.6 x 0.75 mm package with a frequency stability of ±50 ppm over an operating temperature range of -40℃ to 105℃. Additional advantages include a various power supply options ranging from 1.8V, 2.5V, 3.3V and a continuous voltage range of 2.375V to 3.63V. 

## **Features** 

- Available in industry standard frequencies: 100MHz and 156.25MHz 

- ±50ppm stability over industrial operating temperature (-40ºC to +105ºC) 

- 1.8V, 2.5V, 3.3V, 2.375 V to 3.63V Continuous supply voltage options 

- Industry standard 2.0 x 1.6 x  0.75 mm footprint 

- Available in Abracon’s global distribution network 

## **Typical Applications** 

- Optical Transceivers and Modules 

- Data Centers, Storage, and Servers 

- Networking switches and gateways 

- 100G/200G/400G/800G Ethernet 

- Fibre Channel/SONET/SDH/PCIe 

- Industrial and FPGA applications 

- Test & measurement 

## **Electrical Specifications** 

||**Electrical Specifications**|**Electrical Specifications**|**Electrical Specifications**|**Electrical Specifications**|**Electrical Specifications**||||
|---|---|---|---|---|---|---|---|---|
|**Parameters**|||**Min.**|**Typ.**|**Max.**||**Unit**|**Notes**|
|Frequency Range<br>~~ee~~|||100<br>~~ee~~|~~ee~~|156.25<br>~~ee~~||MHz<br>~~ee~~||
|Standard Available Frequencies<br>~~ee~~|||100.000, 156.250<br>~~ee~~<br>~~es~~||||MHz<br>~~ee~~|Contact Abracon for availability of<br>frequencies not listed<br>~~pO~~|
|Supply Voltage (VDD)<br>~~ee ~~|||2.97<br> ~~ee~~<br>~~es~~<br>~~ee~~|3.3<br>~~ee~~|3.63<br>~~ee~~||V<br>~~ee~~|Option “A”<br>~~pO~~<br>~~pO~~|
||||2.375<br>~~es~~<br>~~ee~~<br>~~es~~|2.5|2.625|||Option “B”<br>~~pO~~<br>~~pO~~<br>~~pO~~|
||||1.71<br>~~ee~~<br>~~es~~<br>~~es~~|1.8<br>~~ee~~|1.89|||Option “C”<br>~~pO~~<br>~~pO~~<br>~~pO~~|
||||2.375<br>~~es~~<br>~~es~~|~~ee~~|3.63|||Option “D”<br>~~pO~~<br>~~pO~~|
|Supply Current (IDD)<br>~~————————_—_———e————EE~~||LVPECL<br>~~po~~|~~es~~<br>~~po~~|~~ee~~<br>~~po~~|60<br>~~po~~||mA<br>~~————————_—_———e————EE~~|At 156.2500MHz, 3.3V<br>~~pO~~<br>~~————————_—_———e————EE~~|
|||LVDS<br>~~po~~<br>~~es~~|~~po~~<br>~~es~~|~~po~~<br>~~es~~|20<br>~~po~~<br>~~es~~||||
|||HCSL<br>~~ee~~<br>~~————————_—_———e————EE~~|~~ee~~<br>~~————————_—_———e————EE~~|~~ee~~<br>~~————————_—_———e————EE~~|40<br>~~ee~~<br>~~————————_—_———e————EE~~||||
|Operating Temperature Range<br>~~————————_—_———e————EE~~|||-40<br>~~————————_—_———e————EE~~<br>~~es~~|~~————————_—_———e————EE~~<br>~~es~~|85<br>~~————————_—_———e————EE~~<br>~~ee~~||°C<br>~~————————_—_———e————EE~~<br>|Option “R”<br>~~————————_—_———e————EE~~<br>~~pO~~|
||||-40<br>~~————————_—_———e————EE~~<br>~~es~~|~~————————_—_———e————EE~~<br>~~es~~|105<br>~~————————_—_———e————EE~~<br>~~ee~~|||Option “S”<br>~~————————_—_———e————EE~~<br>~~pO~~|
|Storage Temperature<br>~~————————_—_———e————EE~~<br>~~po~~|||-55<br>~~————————_—_———e————EE~~<br>~~es~~<br>~~po~~|~~————————_—_———e————EE~~<br>~~es~~<br>~~po~~|150<br>~~————————_—_———e————EE~~<br>~~ee ~~<br>~~po~~||°C<br>~~————————_—_———e————EE~~<br> <br>~~po~~|~~————————_—_———e————EE~~<br> ~~pO~~<br>~~po~~|
|First Year Aging<br>~~pp~~<br>~~————_————eeE~~|||-3<br>~~pp~~<br>~~————_————eeE~~|~~pp~~<br>~~————_————eeE~~|3<br>~~pp~~<br>~~————_————eeE~~||ppm<br>~~pp~~<br>~~————_————eeE~~|At 25°C<br>~~pp~~<br>~~————_————eeE~~|
|Frequency Stability[Note 1]<br>~~pp~~<br>~~————_————eeE~~|||-50<br>~~pp~~<br>~~————_————eeE~~<br>~~es~~|~~pp~~<br>~~————_————eeE~~<br>~~ee~~|50<br>~~pp~~<br>~~————_————eeE~~||ppm<br>~~pp~~<br>~~————_————eeE~~|Option “R” (-40°C to +85°C)<br>~~pp~~<br>~~————_————eeE~~<br>~~po~~|
||||-50<br>~~————_————eeE~~<br>~~es~~|~~————_————eeE~~<br>~~ee~~|50<br>~~————_————eeE~~|||Option “S” (-40°C to +105°C)<br>~~————_————eeE~~<br>~~po~~|



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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Electrical Specifications Cont.** 

|**Parameters**|**Parameters**|**Parameters**|**Min.**|**Typ.**|**Max.**|**Unit**|**Notes**|
|---|---|---|---|---|---|---|---|
|Rise (Tr) / Fall (Tf)<br>Time[Note 3]<br>~~ee~~|LVPECL<br>~~a~~||~~a~~|~~a~~|0.5<br>~~a~~|ns|RL=50Ω to Vdd–2.0V on each output|
||LVDS<br>~~Ss~~||~~Ss~~|~~Ss~~|0.5<br>~~Ss~~||RL= 100Ω (Between Outputs)|
||HCSL<br>~~Ps~~<br>~~ee~~||~~Ps~~|~~Ps~~|0.6<br>~~Ps~~||RL= 50Ω to GND, RS=0Ω on each<br>output|
|Duty Cycle<br>~~ee~~<br>~~ee~~|||45<br>||55<br>|%|output|
|Start-up Time[Note 2]<br>~~ee~~<br>~~ee~~<br>~~ee~~|||||2.0<br><br>~~ee~~|ms<br>~~ee~~||
|Output High Voltage<br>(VOH)<br>Output Low Voltage<br>(VOL)<br>~~ee~~|LVPECL<br>~~eeee~~|VOH<br>~~ee~~<br>~~ee~~|VDD-1.105<br>~~ee~~|VDD-0.950<br>~~ee~~|VDD-0.860<br>~~ee~~<br>~~ee~~|V<br>~~ee~~|RL=50Ω into Vdd–2.0V on each output,<br>Option “P”|
|||VOL<br>~~ee~~<br>~~ee~~<br>~~ee~~|VDD-1.810<br>~~ee~~|VDD-1.700<br>~~ee~~<br>~~es~~|VDD-1.590<br>~~ee~~<br>~~ee~~|||
||HCSL<br>~~ss~~|VOH<br>~~ee~~<br>~~ss~~<br>~~ee~~|0.50<br>~~ss~~|~~ss~~<br>~~es~~|1.0<br>~~ee~~<br>~~ss~~||RL= 50Ω to GND, RS=0Ω, Option “H”<br>on each output|
|||VOL<br>~~ss~~<br>~~ee~~|-0.150<br>~~ss~~|~~ss~~<br>~~es~~|0.150<br>~~ss~~|||
|Output Voltage<br>~~eee~~|LVDS<br>~~eee~~<br>~~Ee~~|VOD<br>~~ee~~<br>~~eee~~|247<br>~~eee~~|350<br>~~es~~<br>~~eee~~|454<br>~~eee~~|mV<br>~~eee~~|RL= 100Ω (Between Outputs),<br>Option “D”.|
|||∆VOD<br>~~eee~~<br>~~i~~|~~eee~~<br>~~a~~|~~eee~~|50<br>~~eee~~|mV<br>~~eee~~||
|Offset Voltage<br>~~Ee~~||VOS<br>~~Ee~~|1.125<br>~~Ee~~|1.250<br>~~Ee~~|1.375<br>~~Ee~~|V<br>~~Ee~~||
|||∆VOS<br>~~Ee~~<br>~~a~~<br>~~ee~~|~~Ee~~<br>~~a~~|~~Ee~~<br>~~a~~|50<br>~~Ee~~<br>~~a~~|mV<br>~~Ee~~<br>~~a~~||
|Differential Output Voltage<br>Swing (Vopp)<br>~~a~~||LVPECL<br>~~ee~~<br>~~ee~~|0.80|||V|OUT-OUTN|
|||LVDS<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>|0.50||0.90|||
|||HCSL<br>~~ee~~<br>~~ee~~<br>|1.10||2.20|||
|Tri-state Function<br>~~a~~<br>~~ee~~||VIH<br>~~ee~~<br>|“1” (VIH≥0.7*Vdd) or Open: Oscillation;<br>“0” (VIL<0.3*Vdd): No Oscillation/Hi Z|||V||
|||VIL<br>~~ee~~<br>~~—~~|||||~~——~~|
|Output Enable Time<br>~~—~~<br>~~ee~~<br>~~ee~~|||||2.0|ms|~~——~~|
|Output Disable Time<br>~~—~~<br>~~ee~~<br>~~ee~~<br>~~Sf~~|||~~Sf~~||0.2|µs|~~——~~|
|Output Disable Current Consumption<br>~~ee~~<br>~~Sf~~|||~~Sf~~||10|µA|OE (pad 1) ≤ 0.3*(Vdd)|
|RMS Phase Jitter<br>(12kHz to 20MHz from Carrier)<br>~~Sf~~|||See Table 1 below<br>~~Sf~~||||Vdd, output logic type and Carrier<br>frequency dependent|



Note 3:  Measured over 20% to 80% of waveform 

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**AK1B ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Phase Noise Specifications** 

**Table 1** 

## **RMS Phase Jitter 12kHz – 20MHz BW**[[Note 4,5]] 

|Carrier<br>Frequency|Output<br>Logic|Supply Voltage (1.8V)|Supply Voltage (1.8V)|Supply Voltage (2.5V)|Supply Voltage (2.5V)|Supply Voltage (3.3V)|Supply Voltage (3.3V)|
|---|---|---|---|---|---|---|---|
|||RMS Jitter||RMS Jitter||RMS Jitter||
|||Typ. (fs)|Max (fs)|Typ. (fs)|Max (fs)|Typ. (fs)|Max (fs)|
|100|LVDS|79.3|100|73.7|85|73.7|80|
||LVPECL|NA|NA|75.9|85|75.9|85|
||HCSL|68.6|80|54.4|80|54.4|80|
|156.25|LVDS|53.4|80|34.5|50|34.5|50|
||LVPECL|NA|NA|41.8|60|41.8|50|
||HCSL|47.2|60|34.2|50|34.2|50|



Note 4: Guaranteed by characterization; RMS Phase Jitter specifications are inclusive of any spurs Note 5: Phase jitter measured with Rohde & Schwarz FSWP8 

## **Phase Noise Plots[[Note 5]]** 

Plot #1: LVDS, 3.3V, 100MHz Plot #2: LVPECL, 3.3V, 100MHz 

Plot #3: HCSL, 3.3V, 100MHz 

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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Phase Noise Plots Cont.[[Note 5]]** 

Plot #3: LVDS, 3.3V, 156.25MHz Plot #5: LVPECL, 3.3V, 156.25MHz 

Plot #6: HCSL, 3.3V, 156.25MHz 

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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Mechanical Dimensions** 

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=]<br>R'3<br>=o<br>3S<br>3S,<br>**----- End of picture text -----**<br>


|**Case 1**<br>**Pin #1=Output Enable/Disable**<br>**Function**<br>**_where_ OE is Active HIGH **|**Case 1**<br>**Pin #1=Output Enable/Disable**<br>**Function**<br>**_where_ OE is Active HIGH **|
|---|---|
|**Pin**|**Description**|
|**# 1**|Output Enable =<br>Logic High,"1", Vdd, or NC|
||Output Disable =<br>Logic Low,"0", GND|
|**# 2**|No Connect|
|**# 3**|GND|
|**# 4**|Output|
|**# 5**|Complementary output|
|**# 6**|Supply Voltage (Vdd)|



## Dimensions: Inches [mm] 

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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

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Part Identification<br>AK1B                                        -<br>(6): Packaging<br>a Blank: Bulk<br>(1): Output  (3): Frequency Stability  (5): Output Frequency  T3: Tape & Reel 3,000 units<br>P: LVPECL  R:  ±50 ppm over -40°C to +85°C  in MHz<br>D: LVDS  S:  ±50 ppm over -40°C to +105°C  Please specify the<br>(**) Contact Abracon for availability Frequency in<br>H: HCSL<br>units of MHz<br>out to 4 -digit accuracy<br>    (2): Vdd  after the decimal.<br>A: 3.3V  Example:<br>“156.2500”=156.25MHz<br>B: 2.5V<br>C: 1.8V  **<br>SS D: 2.375 ~ 3.63V   (4): OE Function<br>(**) Not available  1: OE Pin 1; Active High<br>on LVPECL<br>**----- End of picture text -----**<br>


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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Output Waveform Diagram** 

LVPECL: Output Wave Form (Duty, Tr, Tf, VOH, VOL, Vopp) 

LVDS: Output Wave Form (Duty, Tr, Tf, VOD, ∆VOD, VOS, ∆VOS, Vopp) 

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**AK1B** 

**ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Output Waveform Diagram Cont.** 

HCSL: Output Wave Form (Duty, Tr, Tf, VOH, VOL, Vopp) 

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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Recommended Test Circuit[[Note 6]]** 

## **LVPECL** 

## **LVDS** 

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Vdd<br>Vdd<br>per<br>9 —L<br>**----- End of picture text -----**<br>


Vdd=3.3V: R1=R3=127Ω; R2=R4=82.5 Ω Vdd=2.5V: R1=R3=250Ω; R2=R4=62.5 Ω 

## **HCSL** 

Note 6: Recommended test circuit images are representative of when the OE Function is located on Pin 1; when the OE Function is located on Pin 2, then Pin 1=No Connect & Pin 2=OE or No Connect. 

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**AK1B** 

**ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Absolute Maximum Ratings[[Note 7]]** 

|**Parameters**|**Min.**|**Typ. **|**Max.**|**Unit**|**Notes**|
|---|---|---|---|---|---|
|SupplyVoltage<br>~~GG~~|Vss-0.5<br>~~GG~~|~~GG~~|4.5<br>~~GG~~|V<br>~~GG~~|~~GG~~|
|Input Voltage<br>~~CG~~|Vss-0.5<br>~~CG~~|~~CG~~|VDD+0.5<br>~~CG~~|V<br>~~CG~~|~~CG~~|
|Output Voltage<br>~~GO~~|Vss-0.5<br>~~GO~~|~~GO~~|VDD+0.5<br>~~GO~~|V<br>~~GO~~|~~GO~~|
|Maximum Junction OperatingTemperature<br>~~GO~~|~~GO~~|~~GO~~|150<br>~~GO~~|ºC<br>~~GO~~|~~GO~~|
|Ambient OperatingTemperature Range<br>~~eG~~|-40<br>~~eG~~|~~GG~~|85<br>~~GG~~|ºC<br>~~GG~~|Industrial|
|Ambient OperatingTemperature Range<br>~~eG~~<br>~~GO~~|-40<br>~~eG ~~<br>~~GO~~|~~GG~~<br>~~GO~~|105<br>~~GG~~<br>~~GO~~|ºC<br>~~GG~~<br>~~GO~~|Extended Industrial<br>~~GO~~|
|Reflow Temperature<br>~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|260<br>~~GO~~<br>~~GG~~|°C<br>~~GO~~<br>~~GG~~|See Reflow Profile<br>~~GO~~<br>~~GG~~|
|ESD Protection<br>~~GG~~<br>~~CO~~|4kV HBM,300V MM,2kV CDM<br>~~GG~~<br>~~CO~~|||~~GG~~<br>~~CO~~|~~GG~~<br>~~CO~~|



Note 7: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. The data sheet limits are not guaranteed if the device is operated beyond the recommended operating conditions. 

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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Reflow Profile [JEDEC J-STD-020]** 

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Table 1<br>SnPb Eutectic Process<br>Classification Temperatures (Tc)<br>Package  Volume mm [3  ] Volume mm [3  ]<br>Thickness  <350  >350<br><2.5 mm 235 °C 220 °C<br>>2.5 mm  220 °C 220 °C<br>=<br>Table 2<br>Pb-Free Process<br>Classification Temperatures (Tc)<br>Package  Volume mm [3  ] Volume mm [3  ] Volume mm [3  ]<br>Thickness  <350  350-2000  >2000<br><1.6 mm 260 °C 260 °C 260 °C<br>1.6 mm - 2.5 mm 260 °C 250 °C 245 °C<br>>2.5 mm 250 °C 245 °C 245 °C<br>**----- End of picture text -----**<br>


|**Profile Feature**|**Profile Feature**|**Profile Feature**|**Sn-Pb Eutectic**<br>**Assembly**|**Pb-Free**<br>**Assembly**|
|---|---|---|---|---|
|Preheat/soak|||||
|Temperature minimum(Tsmin)|||100°C|150°C|
|Temperature maximum(Tsmax)|||150°C|200°C|
|Time(Tsminto Tsmax) (ts)|||60 - 120 sec.|60 - 120 sec.|
|Average ramp-uprate(Tsmaxto TP)|||3°C/sec. max|3°C/sec. max|
|Liquidous temperature(TL)|||183°C|217°C|
|Time at liquidous(tL)|||60 - 150 sec.|60 - 150 sec.|
|Peakpackage bodytemperature(TP)*****|||**see Table 1**|**see Table 2**|
|Time(tp**)**** within 5°C of the specified classification temperature(TC)|||20 sec.|30 sec.|
|Ramp-down rate(Tpto Tsmax)|||6°C/sec. max|6°C/sec. max|
|Time 25°C topeak temperature|||6 min. max|8 min. max|
|Reflow cycles|||2 max|2 max|
|*****Tolerance for peak profile temperature (T<br>******Tolerance for time at peak profile temperature (t|Tolerance for peak profile temperature (T<br>Tolerance for time at peak profile temperature (t|Tolerance for peak profile temperature (TP) is defined as a supplier minimum and a user maximum.<br>Tolerance for time at peak profile temperature (tp) is defined as supplier minimum and a user maximum.|||



- Tolerance for peak profile temperature (TP) is defined as a supplier minimum and a user maximum. 

- ****** Tolerance for time at peak profile temperature (tp) is defined as supplier minimum and a user maximum. 

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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Packaging** 

T3: 3,000pcs/reel 

|**Tape Specifications(mm)**|**Tape Specifications(mm)**|**Tape Specifications(mm)**|**Tape Specifications(mm)**|**Tape Specifications(mm)**|**Tape Specifications(mm)**|**Tape Specifications(mm)**|**Tape Specifications(mm)**|
|---|---|---|---|---|---|---|---|
|**Width**|Ao|Bo|Do|D1(Min)|E1|F|Ko|
|**8mm**|*****|*****|1.5+0.1/-0.0|1.0|1.75±0.1|3.5±0.05|*****|
|**Width**|P1|P2|P0|T (Max)|T1(Max)|T2(Max)|W (Max)|
|**8mm**|4.0±0.1 2.0±0.05|4.0±0.1 2.0±0.05|4.0±0.1|0.6|0.1|2.5|8.3|



***Note: Compliant to EIA-481** 

## Dimensions: mm 

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**AK1B** 

## **ClearClock™ Oscillator Family | Clock Oscillator| 2.0x1.6mm XO** 

## **Packaging Cont.** 

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Reel Specifications (mm)<br>Width  Qty/Reel  A (Nom)  B (Min)  C (Min)  D (Min)  N (Min)  * W1<br>8mm  3000  178  1.5  13.0+0.5/-0.2  20.2  50  8.4+1.5/-0.0<br>aa<br>**----- End of picture text -----**<br>


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## Dimensions: mm 

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## Links

- [View this product on Novapart](https://novapart.co/products/AK1BPBR1-156.2500T3/oscillator-15625-mhz-50-ppm-lvpecl-25-v-smd-2mm-x)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/abracon/ak1bpbr1-156-2500t3/osc-156-25mhz-lvpecl-smd-2mm-x/dp/4722633RL)
---

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