Analog Devices Inc. LTC6930CDCB-7.37#TRMPBF

Overview

LTC6930CDCB-7.37#TRMPBF from Analog Devices (formerly Linear Technology) is a digitally controlled silicon oscillator with factory-set 7.3728MHz master frequency, selectable via DIVA/DIVB/DIVC pins across 8 output frequencies (57.6kHz–7.3728MHz), ±0.1% frequency accuracy over 0°C to 70°C, 105µA typical supply current at 32kHz/3V, and <110µs start-up time. It serves as a precision clock source in ultra-low-power portable instrumentation.

For engineers reviewing the LTC6930CDCB-7.37#TRMPBF datasheet, LTC6930CDCB-7.37#TRMPBF pinout, LTC6930CDCB-7.37#TRMPBF application, or LTC6930CDCB-7.37#TRMPBF equivalent, key selection criteria include guaranteed initial accuracy, DCB-package thermal performance, µA-level supply current scalability with divider setting, and deterministic single-cycle DIV pin switching behavior.

Technical Context

The LTC6930CDCB-7.37#TRMPBF implements a proprietary switched-capacitor feedback loop to stabilize its 7.3728MHz master oscillator against temperature and supply variation. Its internal binary divider (1–128) is controlled by three CMOS digital inputs (DIVA/DIVB/DIVC), enabling precise frequency selection without external components.

It features dual V+ pins (Pins 1 & 8) and dual GND pins (Pins 2 & 6) to isolate oscillator core from output driver noise, delivering <0.15% RMS period jitter at 3V and maintaining duty cycle between 48%–52% across all divide ratios and 2V–5.5V supply range.

Key Specifications

Pinout & Package

Package: 8-lead (2mm × 3mm) plastic DFN (DCB), exposed pad (Pin 9) required to be soldered to GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled oscillator applications.

Compared with SiT1533AI-H4-33E-32.768E and MAX7375EKA+T, the LTC6930CDCB-7.37#TRMPBF uniquely delivers 7.3728MHz base frequency with ±0.09% accuracy, sub-110µs start-up, and scalable µA-level current across eight discrete outputs-making it optimal for UART, audio, and MCU clocking where both precision and programmability are required.

Availability

LTC6930CDCB-7.37#TRMPBF is available at Aetrix Electronics and suitable for UART interface design, portable medical sensor nodes, low-power microcontroller clocking, industrial control panel RTCs, and battery-operated instrumentation requiring stable component supply across commercial temperature range.

Supply support for LTC6930CDCB-7.37#TRMPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and RF ICs for precision signal processing.

The LTC6930 series was designed as a pin-compatible, ultra-low-power replacement for quartz crystal oscillators in space-constrained, battery-sensitive applications-emphasizing accuracy, fast wake-up, and zero external component count.

FAQ

What is the nominal master oscillator frequency of the LTC6930CDCB-7.37#TRMPBF?

The LTC6930CDCB-7.37#TRMPBF has a factory-programmed master oscillator frequency of exactly 7.372800MHz. This value is fixed and cannot be altered; output frequencies are derived solely through internal binary division (÷1 to ÷128) controlled by the DIVA/DIVB/DIVC pins per Table 1 in the datasheet. The "7.37" suffix in the part number explicitly denotes this base frequency.

Does the LTC6930CDCB-7.37#TRMPBF require external load capacitors like a crystal oscillator?

No, the LTC6930CDCB-7.37#TRMPBF requires no external timing components. It is a fully integrated silicon oscillator with an on-chip master oscillator, control loop, and output divider. Only 0.1µF ceramic bypass capacitors between each V+ pin and its adjacent GND pin are required for stable operation-no load capacitors, crystals, or trimming resistors are needed.

What is the maximum capacitive load the OUT pin of the LTC6930CDCB-7.37#TRMPBF can drive?

The OUT pin of the LTC6930CDCB-7.37#TRMPBF is characterized to drive up to 50pF capacitive load or 1kΩ resistive load. At 7.3728MHz and 3V supply, driving 50pF increases supply current by approximately 2.0mA beyond the base 453µA (typical), as calculated using I_SUPPLY = C_LOAD × V_SWING × f_OSC. Layout best practice recommends minimizing trace length and avoiding routing near noisy signals.

Can the LTC6930CDCB-7.37#TRMPBF operate from a single 1.8V supply?

Yes, the LTC6930CDCB-7.37#TRMPBF operates over a supply range of 1.7V to 5.5V. At 1.8V, it delivers full functionality including all 8 output frequencies, <110µs start-up, and maintains ±0.8% frequency accuracy across 0°C to 70°C. Supply current at 7.3728MHz drops to 296µA (typical), making it suitable for low-voltage microcontroller domains.

How does the LTC6930CDCB-7.37#TRMPBF handle transitions between different DIV settings?

The LTC6930CDCB-7.37#TRMPBF transitions cleanly between DIV settings: the output updates within one complete clock cycle of the new divider ratio, with no runt pulses, glitches, or undefined states. This behavior is guaranteed across all supply voltages (1.7V–5.5V) and temperatures (0°C–70°C), enabling safe dynamic frequency scaling in firmware-controlled applications without additional synchronization logic.