Renesas 8N4S270EC-1088CDI8

Overview

8N4S270EC-1088CDI8 from Renesas (formerly IDT) is a factory-programmable LVDS crystal oscillator using fourth-generation FemtoClock® NG PLL technology. It delivers a precise 1088 MHz output frequency with ≤0.68 ps RMS phase jitter (12 kHz–20 MHz), 2.5 V or 3.3 V supply support, and operates across –40°C to +85°C for wireless infrastructure timing applications.

For engineers reviewing the 8N4S270EC-1088CDI8 datasheet, 8N4S270EC-1088CDI8 pinout, 8N4S270EC-1088CDI8 application, or 8N4S270EC-1088CDI8 equivalent, key selection criteria include its fractional PLL architecture, 218 Hz frequency resolution, LVDS differential output compliance, OE-controlled high-impedance state, and RoHS-compliant 6-pin ceramic 5 mm × 7 mm package.

Technical Context

The 8N4S270EC-1088CDI8 integrates a 114.285 MHz third-overtone crystal and a delta-sigma fractional-N PLL with 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers, enabling programmable synthesis from 15.476 MHz to 866.67 MHz and 975 MHz to 1300 MHz. Its pre-divider (P) and post-divider (N) configure final output while maintaining low phase noise via high-reference-frequency multiplication.

It uses an internal LVCMOS/LVTTL-compatible OE input (pin 1) to asynchronously enable/disable the LVDS Q/nQ outputs (pins 4–5), with internal pullup and defined VIH/VIL thresholds per supply voltage. Power is supplied via VDD (pin 6) and GND (pin 3); pin 2 (DNU) is reserved for factory use only.

Key Specifications

Pinout & Package

6-pin lead-free (RoHS 6) ceramic surface-mount package, 5 mm × 7 mm × 1.55 mm body (CD package). Pin 2 is Do Not Use (DNU); all other pins are electrically defined and validated per datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5338A-A-GM, the 8N4S270EC-1088CDI8 offers guaranteed factory-set 1088 MHz with no configuration overhead, while compared with 8N4SV91EC-1088CDI8, it trades slightly higher jitter for broader fractional-PLL flexibility and identical pinout/package compatibility.

Availability

8N4S270EC-1088CDI8 is available at Aetrix Electronics and suitable for 5G radio units, OTN line cards, high-frequency trading switches, and test equipment requiring stable component supply with guaranteed 1088 MHz output and industrial temperature operation.

Supply support for 8N4S270EC-1088CDI8 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, formed through the acquisition of IDT in 2019, is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions.

The IDT8N4S270 product line was designed specifically for high-performance, factory-programmed timing in wireless infrastructure and telecom systems demanding sub-picosecond jitter and wide-frequency programmability.

FAQ

What is the exact factory-programmed output frequency of the 8N4S270EC-1088CDI8?

The 8N4S270EC-1088CDI8 is factory-programmed to deliver a precise 1088.000000 MHz LVDS output frequency. This value is permanently stored in on-chip ROM and cannot be altered in the field. The '1088' in the part number directly encodes this frequency, and it falls within the device's supported 975–1300 MHz band using fractional PLL feedback.

Does the 8N4S270EC-1088CDI8 support both 2.5 V and 3.3 V supply voltages?

Yes, the 8N4S270EC-1088CDI8 supports either 2.5 V ±5% or 3.3 V ±5% VDD operation, as confirmed in Tables 4A and 4B of the datasheet. Supply voltage selection is determined by the option code ('E' = 2.5 V, 'A' = 3.3 V); the 'E' in 8N4S270EC-1088CDI8 specifies 2.5 V operation, with corresponding DC characteristics including 129–155 mA IDD and adjusted VIH/VIL thresholds.

What is the RMS phase jitter specification for the 8N4S270EC-1088CDI8 at 1088 MHz?

At 1088 MHz, the 8N4S270EC-1088CDI8 exhibits 0.68 ps typical RMS phase jitter over the 12 kHz–20 MHz offset range (Table 5, fractional PLL mode, fXTAL = 114.285 MHz). This value is measured under standard conditions (VDD = 2.5 V or 3.3 V, TA = –40°C to +85°C) and reflects the device's performance in its configured fractional feedback mode.

How is output enable (OE) implemented on the 8N4S270EC-1088CDI8, and what is its electrical interface?

The OE pin (pin 1) on the 8N4S270EC-1088CDI8 is an asynchronous LVCMOS/LVTTL-compatible input with internal pullup resistor (~50 kΩ). When driven low, Q/nQ outputs enter high-impedance state; when high (default), outputs are active. VIH minimum is 1.7 V at 2.5 V VDD, and VIL maximum is 0.7 V - ensuring robust noise margin in industrial environments.

What package type and dimensions does the 8N4S270EC-1088CDI8 use?

The 8N4S270EC-1088CDI8 uses a lead-free (RoHS 6) 6-pin ceramic surface-mount package designated CD, measuring 5.0 mm × 7.0 mm × 1.55 mm. This compact outline is specified in the package outline drawing (page 15) and supports automated placement and reflow soldering in high-density RF and telecom PCB layouts.