Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Crystals, Oscillators, Resonators > Crystals

Renesas 603-40-48JA4I

Name: 603-40-48JA4I
Brand: Renesas
SKU: 603-40-48JA4I
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 603-40-48JA4I

Manufacturer:: Renesas

Category:: Crystals

Package:: 4-SMD, No Lead

Datasheet:: 603-40-48JA4I.pdf

Description:: CRYSTAL 40.0000MHZ 12PF SMD

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,716

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

603-40-48JA4I from Renesas Electronics (formerly IDT) is a 40.000 MHz fundamental-mode quartz crystal in a 3.2 × 2.5 × 1.0 mm JA4 CLCC package, rated for ±20 PPM frequency tolerance and stability over −40°C to +85°C, with 12 pF load capacitance and ≤30 Ω ESR - used as a precision timing reference in industrial microcontrollers and communication PHYs.

For engineers reviewing the 603-40-48JA4I datasheet, 603-40-48JA4I pinout, 603-40-48JA4I application, or 603-40-48JA4I equivalent, key selection criteria include operating temperature range, load capacitance matching, aging specification (±10 PPM over 10 years), soldering profile compliance (260°C/10 s), and RoHS-compliant gold termination.

Technical Context

This is a passive, two-terminal AT-cut fundamental-mode quartz crystal resonator requiring external oscillator circuitry (e.g., MCU internal inverter or dedicated clock buffer). It operates at 40 MHz with fixed 12 pF load capacitance and exhibits low phase noise performance typical of miniature surface-mount crystals in the JA4 footprint.

No internal circuitry or active components are present. The device relies on mechanical resonance and must be paired with appropriate load capacitors and drive-level-limited oscillator topology to meet specified ESR (≤30 Ω), drive level (≤0.3 mW), and frequency stability (±20 PPM over full temperature range).

Key Specifications

Parameter	Value and Actual Design Meaning
Frequency	40.000 MHz - exact nominal oscillation frequency under 12 pF load and 25°C conditions.
Frequency Tolerance	±20 PPM max at 25°C - sets initial calibration error budget before temperature and aging effects.
Frequency Stability	±20 PPM max over −40°C to +85°C - defines total deviation across full operating range.
Load Capacitance	12 pF - required external capacitor value per terminal for nominal frequency accuracy.
ESR	≤30 Ω - maximum series resistance; impacts oscillator start-up reliability and loop gain margin.
Aging (10 yr)	±10 PPM max - long-term drift limit affecting system timing accuracy over product lifetime.
Operating Temp	−40°C to +85°C - validated ambient range for stable resonance without frequency excursion beyond spec.

Pinout & Package

Package: 3.2 × 2.5 × 1.0 mm JA4 ceramic leadless chip carrier (CLCC) with gold-plated terminations, MSL 1, and two terminals (Case Ground and Active Terminal).

Pin/Terminal	Circuit Role	Design Meaning
Terminal 1	Active crystal electrode	Connected to oscillator inverter input or Pierce network; requires matched load capacitance.
Terminal 2	Case ground / mechanical ground	Electrically connected to metal can base; must be tied to PCB ground plane for EMI control and stability.

Key Features

Feature	Design Value
Fundamental-mode resonance	Enables direct 40 MHz operation without overtone filtering complexity or spurious mode risk.
12 pF load capacitance	Matches standard MCU oscillator designs (e.g., STM32, NXP Kinetis) without custom capacitor tuning.
±20 PPM stability over −40°C to +85°C	Meets industrial-grade timing requirements for gateways, PLCs, and motor drives without oven control.
Gold termination & MSL 1 rating	Supports single-reflow assembly and ensures long-term intermetallic reliability in humid environments.
Low 0.3 mW drive level	Reduces crystal fatigue and extends operational life while easing oscillator bias design.

Applications

Industrial PLC Timing Reference	Automotive Body Control Module Clock
Use Scenario: Synchronizing I/O scan cycles and CAN FD message timing in programmable logic controllers. IC Role / Device Role / Timing Role: Primary system clock reference for ARM Cortex-M7-based controller ASICs. Use Value: ±20 PPM stability over −40°C to +85°C ensures deterministic cycle timing across factory-floor thermal gradients.	Use Scenario: Providing master clock to LIN transceivers and EEPROM programming logic in door module ECUs. IC Role / Device Role / Timing Role: Low-power, high-reliability timing source for ASIL-B–compliant subsystems. Use Value: Gold terminations and MSL 1 rating support automotive reflow profiles and long-term under-hood reliability.
Medical Infusion Pump Controller	5G Small Cell Baseband Timing
Use Scenario: Driving real-time dosage calculation engine and display refresh in battery-powered portable infusion devices. IC Role / Device Role / Timing Role: Stable 40 MHz reference for ADC sampling clocks and UI microcontroller timing. Use Value: 10-year aging limit (±10 PPM) supports FDA-mandated device lifetime calibration integrity.	Use Scenario: Supplying reference clock to JESD204B serializer/deserializer in fronthaul interface cards. IC Role / Device Role / Timing Role: Low-phase-noise, mechanically stable element in PLL reference chain. Use Value: 30 Ω ESR and fundamental-mode operation minimize jitter contribution to data converter sampling clocks.

Industrial PLC Timing Reference

Automotive Body Control Module Clock

Use Scenario: Synchronizing I/O scan cycles and CAN FD message timing in programmable logic controllers.

IC Role / Device Role / Timing Role: Primary system clock reference for ARM Cortex-M7-based controller ASICs.

Use Value: ±20 PPM stability over −40°C to +85°C ensures deterministic cycle timing across factory-floor thermal gradients.

Use Scenario: Providing master clock to LIN transceivers and EEPROM programming logic in door module ECUs.

IC Role / Device Role / Timing Role: Low-power, high-reliability timing source for ASIL-B–compliant subsystems.

Use Value: Gold terminations and MSL 1 rating support automotive reflow profiles and long-term under-hood reliability.

Medical Infusion Pump Controller

5G Small Cell Baseband Timing

Use Scenario: Driving real-time dosage calculation engine and display refresh in battery-powered portable infusion devices.

IC Role / Device Role / Timing Role: Stable 40 MHz reference for ADC sampling clocks and UI microcontroller timing.

Use Value: 10-year aging limit (±10 PPM) supports FDA-mandated device lifetime calibration integrity.

Use Scenario: Supplying reference clock to JESD204B serializer/deserializer in fronthaul interface cards.

IC Role / Device Role / Timing Role: Low-phase-noise, mechanically stable element in PLL reference chain.

Use Value: 30 Ω ESR and fundamental-mode operation minimize jitter contribution to data converter sampling clocks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar crystal resonator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ABM3B-40.000MHZ-D2Y-T	Same 3.2 × 2.5 mm size, ±20 PPM tol/stab, but 18 pF CL and 40 Ω ESR max.	Requires board-level capacitor redesign; higher ESR may reduce oscillator margin in low-power MCUs.	Select only if existing layout uses 18 pF load and drive capability exceeds 0.5 mW.
FA-238 40.0000MF12Z-AJ3	Same footprint and 12 pF CL, but ±10 PPM tolerance and −30°C to +85°C range.	Tighter initial tolerance suits high-accuracy UART or USB timing; narrower low-temp limit excludes cold-storage industrial use.	Prefer when ±10 PPM initial accuracy is mandatory and ambient never drops below −30°C.

Compared with ABM3B-40.000MHZ-D2Y-T and FA-238 40.0000MF12Z-AJ3, the 603-40-48JA4I uniquely balances industrial temperature coverage, 12 pF compatibility, and 30 Ω ESR for robust MCU oscillator integration without layout or firmware changes.

Availability

603-40-48JA4I is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device timing applications requiring stable component supply and long-term lifecycle assurance.

Supply support for 603-40-48JA4I 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.

The 603-40-48JA4I belongs to Renesas' legacy IDT crystal portfolio, engineered for high-stability, low-profile timing in space-constrained embedded systems where reliability across extended temperature ranges is critical.

FAQ

What is the load capacitance requirement for the 603-40-48JA4I?

The 603-40-48JA4I requires a 12 pF load capacitance to achieve its specified 40.000 MHz frequency. This value must be realized using external capacitors placed symmetrically between each terminal and ground in the oscillator circuit. Deviations from 12 pF will cause measurable frequency shift - typically +0.025% per 1 pF increase - and may impact timing-critical functions in the host system.

Is the 603-40-48JA4I RoHS compliant and lead-free?

Yes, the 603-40-48JA4I is RoHS compliant and lead-free, with gold-plated terminations and no restricted substances above EU Directive thresholds. Its MSL 1 rating confirms suitability for standard SMT reflow processes without moisture sensitivity concerns, and the device meets JEDEC J-STD-020D.1 requirements for Pb-free assembly.

What is the maximum allowable drive level for the 603-40-48JA4I?

The 603-40-48JA4I has a maximum drive level of 0.3 mW. Exceeding this value accelerates aging and risks activity dip or fracture. Oscillator circuits must be designed to limit crystal current - typically via feedback resistor or inverter gain control - and verified with current probe measurement during validation. The 603-40-48JA4I's low drive level supports long-life deployments in battery-powered or maintenance-free equipment.

Does the 603-40-48JA4I have built-in oscillator circuitry?

No, the 603-40-48JA4I is a passive two-terminal crystal resonator and contains no active circuitry. It must be used with an external oscillator circuit - such as an inverter-based Pierce configuration inside an MCU or a discrete CMOS inverter with load capacitors. The 603-40-48JA4I provides only the resonant element; all amplification, biasing, and startup logic reside externally.

What is the aging specification for the 603-40-48JA4I over its operational lifetime?

The 603-40-48JA4I exhibits a maximum aging drift of ±10 PPM over 10 years under normal operating conditions. This specification accounts for long-term material stress relaxation and hermetic seal integrity. It is measured after initial stabilization (first 30 days) and forms part of the total frequency uncertainty budget alongside initial tolerance and temperature drift - critical for applications requiring decade-long calibration validity like medical or utility metering systems.

603-40-48JA4I Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 4-SMD, No Lead

Packaging:: Strip

Product Status:: Obsolete

Type:: MHz Crystal

Frequency:: 40 MHz

Frequency Stability:: ±20ppm

Frequency Tolerance:: ±20ppm

Load Capacitance:: 12pF

ESR (Equivalent Series Resistance):: 30 Ohms

Operating Mode:: Fundamental

Operating Temperature:: -40°C ~ 85°C

Ratings:: -

Mounting Type:: Surface Mount

Supplier Device Package:: -

Size / Dimension:: 0.130" L x 0.102" W (3.30mm x 2.60mm)

Height - Seated (Max):: 0.043" (1.10mm)

603-40-48JA4I FAQ

1.How can I place an order for 603-40-48JA4I through Aetrix?

Please submit a Request for Quotation (RFQ) for 603-40-48JA4I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 603-40-48JA4I reliable?

The price and inventory of 603-40-48JA4I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 603-40-48JA4I is usually 5 days.

3.What payment methods are accepted for 603-40-48JA4I?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 603-40-48JA4I transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 603-40-48JA4I?

603-40-48JA4I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 603-40-48JA4I order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 603-40-48JA4I?

For technical support, including 603-40-48JA4I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 603-40-48JA4I requirements.

6.How does Aetrix verify that 603-40-48JA4I is sourced from the original manufacturer or authorized distributors?

All 603-40-48JA4I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 603-40-48JA4I meets industry standards.

7.What is the process for return or replacement of 603-40-48JA4I?

All 603-40-48JA4I units undergo pre-shipment inspection (PSI). If there is an issue with 603-40-48JA4I, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 603-40-48JA4I part is unused and in its original packaging.

Return procedure for 603-40-48JA4I:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…