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A-7.3728-18
Crystal, A, 7.3728 MHz, 30 ppm, 50 ppm, 18 pF
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: RALTRON
- Product type: Crystals
- Frequency Nom:7.3728MHz; Crystal Case:Through Hole, 11mm x 4.65mm; Frequency Stability + / -:50ppm; Load Capacitance:18pF; Frequency Tolerance + / -:30ppm; Product Range:A Series; Opera
- SVHC: No SVHC (04-Feb-2026)
- No. of Pins: 2Pins
- Frequency Nom: 7.3728MHz
- Product Range: A
- Crystal Mounting: Through Hole
- Load Capacitance: 18pF
- Crystal Frequency: 7.3728MHz
- Crystal Case / Package: Through Hole, 11mm x 4.65mm
- Frequency Stability + / -: 50ppm
- Frequency Tolerance + / -: 30ppm
- Operating Temperature Max: 70°C
- Operating Temperature Min: -20°C
| Delivery and price | |
|---|---|
| Units per pack | 1000 |
| Price | 0.209 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
**MICROPROCESSOR CRYSTAL UNITS FEATURES SERIES A, B, C** EXCELLENT CLOCK SIGNAL GENERATOR FOR CPU’s **HC-49/U, HC-51/U, AND UM-1** WIDE FREQUENCY RANGE INDUSTRY STANDARD PACKAGES **SPECIFICATIONS** FREQUENCY RANGE 100.00 KHz TO 300.00 MHz A: HC-49/U 1.00 MHz TO 300.00 MHz HOLDER TYPES B: HC-51/U 100.00 KHz TO 4.00 MHz C: UM-1 8.00 MHz TO 300.00 MHz ±30 PPM TYPICAL FREQUENCY TOLERANCE AT 25 °C ±50 PPM MAXIMUM ±50 PPM TYPICAL FREQUENCY STABILITY OVER TEMPERATURE ±100 PPM MAXIMUM -20 °C TO +70 °C STANDARD OPERATING TEMPERATURE RANGE -40° C TO +85 °C EXTENDED STORAGE TEMPERATURE RANGE -55 °C TO +125 °C AGING ±5 PPM PER YEAR MAXIMUM LOAD CAPACITANCE 10 TO 32 pF 0R SERIES SHUNT CAPACITANCE 7 pF MAXIMUM EQUIVALENT SERIES RESISTANCE (ESR) SEE PAGE 11 0.1 mW TYPICAL DRIVE LEVEL 1 mW MAXIMUM ±5 PPM MAXIMUM 75 cm DROP TEST IN 3 AXES ONTO A HARD SHOCK RESISTANCE ~~=a~~ SURFACE OR 1000 g’s x 0.5 ms x ½ SINEWAVE IN 3 AXES **FREQUENCY RANGE AND MODE OF OSCILLATION BY HOLDER TYPE** FUNDAMENTAL THIRD OVERTONE FIFTH OVERTONE SEVENTH OVERTONE NINTH OVERTONE HOLDER TYPE (FUND) (3OT) (5OT) (7OT) (9OT) TYPE A: HC-49/U 1.00 MHz TO 65.00 MHz 20.00 MHz TO 90.00 MHz 60.00 MHz TO 130.00 MHz 125.00 MHz TO 200.00 MHz 180.00 MHz TO 300.00 MHz TYPE B: HC-51/U 100.00 KHz TO 4.00 MHz TYPE C: UM-1 8.00 MHz TO 65.00 MHz 25.00 MHz TO 90.00 MHz 60.00 MHz TO 130.00 MHz 125.00 MHz TO 200.00 MHz 180.00 MHz TO 300.00 MHz ~~——~~ **PART NUMBERING SYSTEM** EXTENDED HOLDER TYPE FREQUENCY LOAD CAPACITANCE MODE TEMPERATURE F FUNDAMENTAL A HC-49/U - - - 3OT THIRD OVERTONE - B HC-51/U IN MHz 10 TO 32pF FOR PARALLEL 5OT FIFTH OVERTONE EXT S FOR SERIES C UM-1 7OT SEVENTH OVERTONE 9OT NINTH OVERTONE ~~==~~ MECHANICAL OPTIONS TAPE AND REEL THIRD LEAD - THREE PIN BASE SPACER SLEEVE - (TOP OF HOUSING) - - TR 3PIN 3RD SP SL ~~aie~~ † FUNDAMENTAL MODE NOT NEEDED IN PART NUMBER EXAMPLE: A-4.000-S A-3.579545-18-EXT-3PIN-SP-SL-TR C-65.000-S-30T **R AMI TECHNOLOGY 10651 NW 19th St. Miami, Florida 33172 U.S.A. Tel: 305-593-8000 Fax: 305-59 3-8487 e-mail: sales@ra mitechnology .com web: www.ramitechnology.com** **OUTLINE DRAWINGS FOR MICROPROCESSOR CRYSTALS** **==> picture [516 x 664] intentionally omitted <==** **----- Start of picture text -----**<br> 0.35 DIA<br>0.43 DIA .014 DIA<br>.017 DIA<br>m l 0.76 DIA -<br>4.88 3.76<br>.192 .148<br>12.34<br>.486<br>7.90 MAX<br>Hi 11.05 MAX a E .311 MAX<br>.435 MAX<br>T 19.23 MAX G+)<br>.757 MAX<br>on 7<br>TYPE A (HC-49/U) TYPE B (HC-51/U) TYPE C (UM-1)<br>PACKAGE OPTIONS<br>TRANSPARENT<br>PLASTIC<br>SLEEVING<br>0.43 DIA<br>.017 DIA<br>4.88<br>.192<br>TRANSPARENT<br>PLASTIC<br>SLEEVING<br>11.05 MAX<br>.435 MAX<br>THIRD LEAD OPTION: 3RD PLASTIC SLEEVE OPTION: SL<br>4.88<br>3 X 0.46 DIA .192 2.44<br>3 X .018 DIA .192<br>0.43 DIA<br>.017 DIA<br>aa<br>4.88 10.66<br>.192<br>2.44 .420<br>.096<br>TT |<br>11.05 MAX<br>sf .435 MAX<br>.030 DIA<br>19.70 MAX<br>4.65 MAX<br>.352 MAX<br>8.00 MAX<br>.776 MAX<br>.315 MAX<br>12.00 MIN<br>8.94 MAX<br>.787 MIN<br>.130 MAX<br>.183 MAX<br>13.49 MAX .531 MAX<br>12.00 MIN .472 MIN<br>4.75 MAX .187 MAX<br>13.5 MAX .530 MAX<br>20.0 MIN .787 MIN<br>4.65 MAX .183 MAX<br>4.57 .180<br>0.5 MAX .02 MAX<br>13.49 MAX<br>.472 MIN<br>.472 MIN<br> .531 MAX<br>3.30 MAX<br>20.0 MIN<br>12.00 MIN<br>**----- End of picture text -----**<br> ## **PACKAGE OPTIONS** ## **3 LEAD BASE OPTION: 3PIN** ## **PLASTIC SPACER OPTION: SP** **R AMI TECHNOLOGY 10651 NW 19th St. Miami, Florida 33172 U.S.A. Tel: 305-593-8000 Fax: 305-59 3-8487 e-mail: sales@ra mitechnology .com web: www.ramitechnology.com** **ESR CHARACTERISTICS AND TAPE AND REEL DIMENSIONS** ## **EQUIVALENT SERIES RESISTANCE VERSUS FREQUENCY AND PACKAGE** **==> picture [552 x 344] intentionally omitted <==** **----- Start of picture text -----**<br> FREQUENCY FREQUENCY<br>HOLDER TYPE ESR HOLDER TYPE ESR<br>MHz MHz<br>a HC-51/U "B" HC-49/U "A" UM-1 "C" "B" "A" "C" ooo HC-51/U "B" HC-49/U "A" UM-1 "C" "B" "A" "C"<br>a 1.000 B A 700 700 11.059 A C EO 25 ET 50<br>a 1.843 B A Tr 600 700 J 12.000 es A C + 25 40<br>a 2.000 B A Tr 500 500 J 12.288 es A C ——+——J 25 40<br>a 2.097152 B A T 500 ro 500 EJJ 13.5168 es A C —+——-—_+—J 25 40<br>2.4576 B A 400 400 14.31818 A C 25 35<br>3.000 B A 150 200 14.7456 A C 25 35<br>rs 3.2768 B A Tr 150 180 J 15.000 es A C -—_+—J 25 35<br>rs 3.579545 B A Tr 120 180 EJ 16.000 ee A C -——+-—J 25 30<br>rsa 3.600 B A TrTr 100 160 EJ 16.384 ee A C -—+-—J-—+-—J 25 35<br>a 3.6864 B A Tr 100 140 J 17.360 es A C -—_+-—J 25 30<br>4.000 B A 50 80 18.000 A C 20 25<br>Tr J es —+——<br>a 4.096 A Tr 80 J 18.432 es A C ——+—— 20 30<br>4.194304 A 80 19.354 A C 20 30<br>PT 4.433619 -—— A —| 80 19.6608 ee A C -—}— 20 30<br>PT 4.9152 J A —| 60 20.000 ee A C -—}— 20 30<br>oo 5.000 -———— A —| 60 a 22.1184 es A C -—_+—J 20 25<br>oT 5.0688 J A —| 60 a 23.400 es A C + 20 25<br>oT 5.185 J A —| 60 a 24.000 ee A C + 20 25<br>oo 5.7143 J A —| 50 a 24.576 ee A C -——+-—J 30 25<br>oo 5.9904 J A | 50 a 25.000 es A C —_+-—J 30 20<br>PT 6.000 J A —| 50 27.000 ee A C -—}— 30 20<br>oO 6.144 J A —| 40 30.000 ee A C -—}— 30 20<br>oO 6.400 J A —| 40 32.000 ee A C -—}— 30 60<br>6.5536 A 40 36.000 A C 30 60<br>PT 7.000 J A —| 30 40.000 ee A C -—}— 30 50<br>PT 7.15909 -———— A —| 30 a 48.000 es A C -—_+—J 30 50<br>PT 7.3728 -———— A —| 30 a 60.000 es A C ——+-—J 30 40<br>| es -—_+-—J<br>TT 8.000 -————J A —| 30 a 70.000 es A C a 30 40<br>PT 9.216 -— A —| 30 a 80.000 es A C a 30 40<br>PT 9.8304 J A -— 30 a 90.000 es A C -—_+-—J 40 40<br>oO 10.000 J A C —| 25 50 100.000 ee A C -—}— 40 100<br>}-+— ee -—}—<br>oO 10.738635 ——+4 A C 25 50 150.000 ee A C -—}— 50 70<br>11.000 A C 25 50 200.000 A C 100 120<br>PT 11.050 + A C }-+-— 25 50 a 300.000 es A C -—_+—J 150 180<br>| es a<br>pT +4 }-+-— a es ——+-—J<br>**----- End of picture text -----**<br> ## **CARRIER TAPE DIMENSIONS** **==> picture [66 x 8] intentionally omitted <==** **----- Start of picture text -----**<br> HC-49/U ONLY<br>**----- End of picture text -----**<br> ## **PACKAGING** 370 mm REEL DIAMETER, 18 mm TAPE WIDTH, 12.7 mm PITCH, QUANTITY 1000 PIECES PER REEL **R AMI TECHNOLOGY 10651 NW 19th St. Miami, Florida 33172 U.S.A. Tel: 305-593-8000 Fax: 305-59 3-8487 e-mail: sales@ra mitechnology .com web: www.ramitechnology.com**
Updated at April 20, 2026
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