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DS32KHZN/DIP

hot DS32KHZN/DIP

DS32KHZN/DIP

For Reference Only

Part Number DS32KHZN/DIP
Manufacturer Maxim Integrated
Description OSC TCXO 32.768KHZ CMOS PC PIN
Datasheet DS32KHZN/DIP Datasheet
Package 14-DIP Module
In Stock 29806 piece(s)
Unit Price Request a Quote
Lead Time Can Ship Immediately
Estimated Delivery Time Feb 27 - Mar 3 (Choose Expedited Shipping)
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DS32KHZN/DIP

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DS32KHZN/DIP Specifications

ManufacturerMaxim Integrated
CategoryCrystals, Oscillators, Resonators - Oscillators
Datasheet DS32KHZN/DIP Datasheet
Package14-DIP Module
SeriesDS
TypeTCXO
Frequency32.768kHz
OutputCMOS
Voltage - Supply5V
Frequency Stability±7.5ppm
Operating Temperature-40°C ~ 85°C
Current - Supply (Max)220µA
Mounting TypeThrough Hole
Package / Case14-DIP Module
Size / Dimension0.860" L x 0.460" W (21.84mm x 11.68mm)
Height - Seated (Max)0.315" (8.01mm)

DS32KHZN/DIP Datasheet

Page 1

Page 2

AVAILABL E Functional Diagrams Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. GENERAL DESCRIPTION The DS32kHz is a temperature-compensated crystal oscillator (TCXO) with an output frequency of 32.768kHz. This device addresses applications requiring better timekeeping accuracy, and can be used to drive the X1 input of most Dallas Semiconductor real-time clocks (RTCs), chipsets, and other ICs containing RTCs. This device is available in commercial (DS32kHz) and industrial (DS32kHz-N) temperature versions. APPLICATIONS GPS Receivers Telematics Network Timing and Synchronization in Servers, Routers, Hubs, and Switches Automatic Power Meters FEATURES Accurate to ±4 Minutes/Year (-40°C to +85°C) Accurate to ±1 Minute/Year (0°C to +40°C) Battery Backup for Continuous Timekeeping VBAT Operating Voltage: 2.7V to 5.5V with VCC Grounded VCC Operating Voltage: 4.5V to 5.5V Operating Temperature Range: 0°C to +70°C (Commercial) -40°C to +85°C (Industrial) No Calibration Required Low-Power Consumption Surface Mountable Using BGA Package UL Recognized ORDERING INFORMATION PART TEMP RANGE PIN- PACKAGE TOP MARK* DS32KHZ/DIP 0ºC to +70ºC 14 DIP DS32KHZ DS32KHZN/DIP -40ºC to +85ºC 14 DIP DS32KHZ-N DS32KHZS 0ºC to +70ºC 16 SO (0.300”) DS32KHZS DS32KHZS# 0ºC to +70ºC 16 SO (0.300”) DS32KHZS DS32KHZSN -40ºC to +85ºC 16 SO (0.300”) DS32KHZSN DS32KHZSN# -40ºC to +85ºC 16 SO (0.300”) DS32KHZSN DS32KHZ/WBGA 0ºC to +70ºC 36 BGA DS32KHZ DS32KHZN/WBGA -40ºC to +85ºC 36 BGA DS32KHZ-N #Denotes a RoHS-compliant device that may include lead that is exempt under the RoHS requirements. The lead finish is JESD97 category e3, and is compatible with both lead-based and lead-free soldering processes. *A “#” anywhere on the top mark denotes a RoHS-compliant device. An “N” denotes an industrial device. PIN CONFIGURATIONS DS32kHz 32.768kHz Temperature-Compensated Crystal Oscillator www.maxim-ic.com REV: 080607

Page 3

DS32kHz 2 of 8 ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground………………………………………………………………-3.0V to +7.0V Operating Temperature Range (Noncondensing) Commercial:…………………………………………………………………………………………………..0°C to +70°C Industrial:……………………………………………………………………………………………………-40°C to +85°C Storage Temperature Range………………………………………………………………………………….-40°C to +85°C Soldering Temperature (BGA, SO)……………………….See the Handling, PC Board Layout, and Assembly section. Soldering Temperature, Leads (DIP)……………………………………………………..+260°C for 10 seconds (Note 1) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED DC OPERATING CONDITIONS (TA = -40°C to +85°C) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Power-Supply Voltage VCC (Note 2) 4.5 5.0 5.5 V Battery Voltage VBAT (Notes 2, 3) 2.7 3.0 3.5, 5.5 V DC ELECTRICAL CHARACTERISTICS (Over the operating range, unless otherwise specified.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Active Supply Current ICC VBAT = 0V or 2.7V ≤ VBAT ≤ 3.5V (Notes 3, 4) 150 220 μA Battery Input-Leakage Current IBATLKG VCC MIN ≤ VCC ≤ VCC MAX -50 +50 nA High Output Voltage (VCC) VOH IOH = -1.0mA (Note 2) 2.4 V Low Output Voltage VOL IOL = 2.1mA (Note 2) 0.4 V High Output Voltage (VBAT) VOH IOH = -0.1mA (Note 2) 2.4 V Battery Switch Voltage VSW (Note 2) VBAT V (VCC = 0V, TA = -40°C to +85°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Active Battery Current IBAT VBAT = 3.3V (Notes 4, 5, 6) 1 4 μA Battery Current During Temperature Measurement IBATCNV VBAT = 3.3V (Notes 4, 5, 7) 450 μA Note 1: Limits at -40°C are guaranteed by design and are not production tested. Note 2: All voltages are referenced to ground. Note 3: VBAT must be no greater than 3.5V when the device is used in the dual-supply operating modes. Note 4: Typical values are at +25°C and 5.0V VCC, 3.0 VBAT, unless otherwise indicated. Note 5: These parameters are measured under no output load conditions. Note 6: This current is the active-mode current sourced from the backup supply/battery. Note 7: A temperature conversion lasts 122ms (typ) and occurs on power-up and then once every 64 seconds.

Page 4

DS32kHz 3 of 8 AC TIMING CHARACTERISTICS (Over the operating range, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Frequency fOUT 32.768 kHz 0°C to +40°C -2.0 +2.0 Frequency Stability vs. Temperature ∆f/fO -40°C to +85°C or 0°C to +70°C -7.5 +7.5 ppm Duty Cycle tW/t 45 50 55 % Cycle Time tCYC (Note 8) 30.518 μs High/Low Time tH/tL (Note 8) 15.06 μs Rise Time tR (Note 8) 200 ns Fall Time tF (Note 8) 60 ns Oscillator Startup Time tOSC (Note 8) 1 seconds Frequency Stability vs. Operating Voltage ∆f/V VCC = 5.0V or VBAT = 3.0V, VCC = 0V (Notes 4, 9) +2.5 ppm/V Crystal Aging (First Year) ∆f/fO (Notes 4, 10) ±1.0 ppm Note 8: These parameters are measured using a 15pF load. Note 9: Error is measured from the nominal supply voltage of whichever supply is powering the device. Note 10: After reflow. Figure 1. DS32kHz Output Waveform

Page 5

DS32kHz 4 of 8 TYPICAL OPERATING CHARACTERISTICS (VCC = 3.3V, TA = +25°C, unless otherwise noted.) IBAT versus VBAT 1.5 2 2.5 3 3.5 4 4.5 2.7 3.2 3.7 4.2 4.7 5.2 VBAT (V) SU PP LY C UR RE NT (u A) ICC versus VCC 75 85 95 105 115 125 135 145 4.50 4.75 5.00 5.25 5.50 VCC (V) SU PP LY C UR RE NT (u A) Frequency Deviation Versus Supply Voltage -1 0 1 2 3 4 5 6 7 2.7 3.2 3.7 4.2 4.7 5.2 Supply Voltage (V) De via tio n i n p pm VBAT VCC IBAT vs. VBAT vs. output load 0.0 2.5 5.0 7.5 10.0 12.5 15.0 2.7 3.2 3.7 4.2 4.7 5.2 VBAT SU PP LY C UR RE NT (u A) 10pF 22pF 47pF 0pF

Page 6

DS32kHz 5 of 8 PIN DESCRIPTION PIN SO BGA DIP NAME FUNCTION 1 C4, C5, D4, D5 12 32kHz 32.768kHz Push-Pull Output 2 C2, C3, D2, D3 13 VCC Primary Power Supply 3–12, 15, 16 A7, A8, B7, B8, C7, C8, D7, D8 1, 6–11, 14 N.C. No Connection (Must be grounded) 13 All remaining balls 4 GND Ground 14 A4, A5, B4, B5 5 VBAT +3V Nominal Supply Input. Used to operate the device when VCC is absent. Figure 2. Delta Time and Frequency vs. Temperature FUNCTIONAL DESCRIPTION The DS32kHz is a temperature-compensated crystal oscillator (TCXO) that outputs a 32,768Hz square wave. While the DS32kHz is powered by either supply input, the device measures the temperature every 64 seconds and adjusts the output frequency. The device requires four pins for operation: VCC, GND, VBAT, and 32kHz. (See Figure 4 for connection schemes.) Power is applied through VCC and GND, while VBAT is used to maintain the 32kHz output in the absence of power. Once every 64 seconds, the DS32kHz measures the temperature and adjusts the output frequency. The output is accurate to ±2ppm (±1 min/yr) from 0°C to +40°C and to ±7.5ppm (±4 min/year) from -40°C to 0°C and from +40°C to +85°C. -200 -180 -160 -140 -120 -100 -80 -60 -40 -20 0 20 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Temperature (°C) D el ta F re qu en cy ( pp m ) -100 -80 -60 -40 -20 0 D el ta T im e (M in /Y ea r) Typical Crystal, Uncompensated DS32kHz Accuracy Band Crystal +20ppm Crystal -20ppm

Page 7

DS32kHz 6 of 8 The DS32kHz is packaged in a 36-pin ball grid array (BGA). It also is available in a 16-pin 0.300” SO and a 14-pin encapsulated DIP (EDIP) module. The additional PC board space required to add the DS32kHz as an option for driving a RTC is negligible in many applications (see Figure 6) Therefore, adding the DS32kHz to new designs and future board revisions allows the use of the DS32kHz where applications require improved timekeeping accuracy. Figure 3. Block Diagram OPERATION The DS32kHz module contains a quartz tuning-fork crystal and an IC. When power is first applied, and when the device switches between supplies, the DS32kHz measures the temperature and adjusts the crystal load to compensate the frequency. The power supply must remain at a valid level whenever a temperature measurement is made, including when VCC is first applied. While powered, the DS32kHz measures the temperature once every 64 seconds and adjusts the crystal load. The DS32kHz is designed to operate in two modes. In the dual-supply mode, a comparator circuit, powered by VCC, monitors the relationship between the VCC and VBAT input levels. When VCC drops below a certain level compared to VBAT, the device switches over to VBAT (Figure 4A). This mode uses VCC to conserve the battery connected to VBAT while VCC is applied. In the single-supply mode, VCC is grounded and the unit is powered by VBAT. Current consumption is less than VCC, because the comparator circuit is unpowered (Figure 4B). Figure 4A shows how the DS32kHz should be connected when using two power supplies. VCC should be between 4.5V and 5.5V, and VBAT should be between 2.7V and 3.5V. Figure 4B shows how the DS32kHz can be used when only a single-supply system is available. VCC should be grounded and VBAT should then be held between 2.7V and 5.5V. The VBAT pin should be connected directly to a battery. Figure 4C shows a single-supply mode where VCC is held at +5V. See the frequency stability vs. operating voltage for information about frequency error vs. supply voltage. Temperature Measurement VBAT 32.768kHz VCC Power Switching Circuit GND P N Power Control Dallas Semiconductor DS32kHz

Page 8

DS32kHz 7 of 8 Figure 4. Power-Supply Connections Figure 5 illustrates how a standard 32.768kHz crystal and the DS32kHz should be connected to address the interchangeable option. Using this connection scheme and the recommended layout provides a solution, which requires no hardware modifications. Only one device should be used at a time, and both layouts should be located very close together if the recommended layout is not used. The DS32kHz ICC and IBAT currents are specified with no output loads. Many RTC oscillator circuits use a quartz crystal or resonator. Driving the oscillator circuit with the rail-to-rail output of the DS32kHz can increase the ICC and IBAT currents significantly and increase the current consumption of the RTC as well. Figure 6 shows one circuit that can be used to reduce the current consumption of a DS32kHz and an RTC. The values of R1 and C1 may vary depending on the RTC used. However, values of 1.0MΩ and 100pF are recommended as a starting point. R2 is used to shift the input waveform to the proper level. The recommended value for R2 is 33kΩ. Figure 5. DS32kHz Connections Figure 6. DS32kHz and RTC Connections DS32kHz RTC VCC VBAT X1 X2 R2 33kΩ C1 100pF R1 1MΩ VCC VBAT DS32kHz VCC VBAT RTC 32kHz out 32.768 Hz X1 or Xin X2 or Xout VCC VBAT A PC board can be laid out so that the RTC can use either the DS32kHz or a crystal GND 32.768kHz out 4.5V - 5.5V Vcc Vbat GND 32.768kHz out Vcc Vbat 2.7V - 3.3V 2.7V - 5.5V GND 32.768kHz out Vcc Vbat 4.5V - 5.5V A B C

DS32KHZN/DIP Reviews

Average User Rating
5 / 5 (178)
★ ★ ★ ★ ★
5 ★
160
4 ★
18
3 ★
0
2 ★
0
1 ★
0

Bra***** Hall

December 27, 2019

Arrived safely. All OK. Thanks

Ann*****urray

December 22, 2019

Worked as advertised and good price. Can you imagine buying these at local store it would cost way to much.

Elia*****Hull

November 26, 2019

Very good and very fast . 100% safe company

Kar*****Ruiz

September 12, 2019

Not much to say. Nice and cheap, and haven't had a failure yet.

Zaid*****kinson

May 21, 2019

Great communication with sales. A pleasure to do business with you.

Caro***** Walsh

February 5, 2019

Perfect! Nice components, professional service!

Ensley*****maniam

December 17, 2018

Heisener has everything! Each product is easy to search and navigate. No minimum quantities. Fast shipping!

Aria*****hosla

December 14, 2018

I have never been experienced anything wrong with my order, the logistic has always get out the same day, and the items are always well packaged.

Eli*****Combs

November 1, 2018

You guys and girls are fantastic! The selection is fantastic and service is great.

Gabri*****Rastogi

September 30, 2018

2nd time buying these - quite good. Very fast shipping

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