ACH-18.432MHZ-EK ABRACON Crystal or Oscillator (Other) In Stock
ABRACON ACH-18.432MHZ-EK is an 18.432 MHz HCMOS/TTL crystal oscillator with enable/disable tri-state output, operating from a 5 V supply. Housed in a half-size 8-DIP metal can package with 4 through-hole leads for easy PCB integration. Available from stock with worldwide shipping.
- Manufacturer
- ABRACON
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- ACH-18.432MHZ-EK Datasheet PDF
- Category
- Crystal or Oscillator
- Temp Range
- -20.0°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 18.432 MHz output frequency — a standard UART baud rate clock enabling precise 115200 baud, 57600 baud, and higher serial communication rates with zero baud error
- Enable/disable tri-state function allows dynamic clock gating for power management in multi-clock embedded systems operating at 5 V
- HCMOS/TTL compatible output with 10 ns maximum fall time delivers clean, fast edges suitable for driving microcontrollers and FPGA clock inputs directly
Applications
The ACH-18.432MHZ-EK is the preferred clock source for UART and serial communication designs requiring exact baud rate generation at 5 V, since 18.432 MHz is an integer multiple of standard baud rates from 1200 baud up to 115200 baud. It is widely used in industrial serial protocol bridges, embedded modem designs, and legacy RS-232 or RS-485 interfaces where crystal-accuracy timing at 18.432 MHz eliminates baud rate error in communication stacks.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 20Weeks |
| YTEOL | 5.44 |
| Additional Feature | TRI-STATE; ENABLE/DISABLE FUNCTION |
| Fall Time-Max | 10ns |
| Frequency Adjustment-Mechanical | NO |
| Frequency Stability | 30% |
| Mounting Feature | THROUGH HOLE MOUNT |
| Operating Frequency-Nom | 18.432MHz |
| Oscillator Type | HCMOS/TTL |
| Output Load | 10 TTL, 15 pF |
| Physical Dimension | 12.7mm x 12.7mm x 6.39mm |
| Rise Time-Max | 10ns |
| Supply Current-Max | 30mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | NO |
| Symmetry-Max | 55/45 % |
| Technology | HCMOS |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | South Korea |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Why is 18.432 MHz a preferred oscillator frequency for UART serial communication designs?
18.432 MHz divides evenly by factors that produce standard UART baud rates including 115200, 57600, 9600, and 1200 baud with 0% mathematical error. This makes the ACH-18.432MHZ-EK the ideal clock source for UART controllers and serial communication ASICs that depend on integer clock divisors for precise baud rate generation without accumulated timing drift.
What supply voltage and output logic family does the ACH-18.432MHZ-EK support?
The ACH-18.432MHZ-EK operates from a 5 V supply and provides HCMOS/TTL compatible logic output with typical high output voltage above 4 V and maximum fall time of 10 ns. These characteristics are compatible with legacy 5 V microcontrollers, FPGAs, and logic gate inputs requiring fast clock edges at 18.432 MHz.
How does the tri-state enable/disable feature of the ACH-18.432MHZ-EK support power management in embedded systems?
The ACH-18.432MHZ-EK's tri-state enable/disable pin allows the oscillator output to be placed in a high-impedance state under firmware control, effectively gating the 18.432 MHz clock to peripherals that do not need it during low-power sleep modes. This feature reduces dynamic power consumption in battery-operated serial communication devices without requiring additional clock buffer ICs.
What is the package type of the ACH-18.432MHZ-EK and how does it simplify prototyping?
The ACH-18.432MHZ-EK uses a half-size 8-DIP metal can package with 4 through-hole leads on a 0.3" lead spacing, which plugs directly into standard DIP sockets and breadboards. This makes it easy to prototype 18.432 MHz clocked UART circuits on development boards and evaluate baud-rate accuracy before committing to a final PCB layout.
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