Renesas 85322AMLF

Overview

The 85322AMLF from Renesas Electronics (formerly IDT) is a dual LVCMOS/LVTTL-to-LVPECL clock translator IC that converts single-ended logic inputs into differential 2.5V/3.3V LVPECL outputs. It supports two independent clock channels (CLK0/CLK1), delivers ≤267 MHz output frequency at 3.3V, achieves ≤250 ps part-to-part skew, and operates in an 8-pin SOIC package with 3.3V or 2.5V supply rails.

For engineers reviewing the 85322AMLF datasheet, 85322AMLF pinout, 85322AMLF application, or 85322AMLF equivalent, this device is selected for high-speed clock distribution in telecom infrastructure, FPGA interface timing, and multi-processor synchronization where low skew, LVPECL compatibility, and dual-channel translation are required.

Technical Context

The 85322AMLF implements two independent translation paths, each accepting LVCMOS/LVTTL inputs via internal 51 kΩ pull-up resistors and driving matched differential LVPECL output pairs (Q0/nQ0, Q1/nQ1). Input thresholds are defined for both 2.5V and 3.3V VCC operation, with VIH/VIL ranges of 1.6–2.925 V / –0.3–0.9 V (2.5V mode) and 2.0–3.765 V / –0.3–1.3 V (3.3V mode).

LVPECL outputs are terminated to VCC – 2V through external 50 Ω loads, delivering 0.65–1.0 V peak-to-peak swing, 300–700 ps rise/fall times, and 40–60% duty cycle across 133 MHz test conditions. Propagation delay is 0.6–1.8 ns (3.3V) or 0.8–2.0 ns (2.5V), measured from VCC/2 input crossing to differential output crossing point.

Key Specifications

Pinout & Package

85322AMLF uses an 8-pin SOIC (M suffix) package measuring 3.90 mm × 4.92 mm × 1.37 mm, compliant with JEDEC MS-012 and lead-free RoHS requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock translation applications.

Compared with MC100LVEL16DG and SN65LVDS31DR, the 85322AMLF uniquely combines dual-channel LVCMOS/LVTTL-to-LVPECL translation, integrated pull-ups, and guaranteed ≤250 ps part-to-part skew-making it optimal for space-constrained, multi-clock-domain systems requiring JEDEC-compliant LVPECL signaling without external bias networks.

Availability

85322AMLF is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA interface timing, and industrial PLC real-time bus applications requiring stable component supply and long-term lifecycle assurance.

Supply support for 85322AMLF 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 automotive, industrial, and infrastructure markets.

The 85322AMLF belongs to Renesas' high-performance clock translation product line, engineered specifically for deterministic, low-skew clock domain bridging in multi-processor and high-speed serial communication systems.

FAQ

What supply voltages does the 85322AMLF support?

85322AMLF supports two nominal supply voltages: 2.5V (operating range 2.375 V to 2.625 V) and 3.3V (3.135 V to 3.465 V). The device automatically adapts input threshold levels and output drive strength to the selected VCC, enabling seamless integration into mixed-voltage designs without external level shifters. Both configurations maintain full functionality including dual-channel translation and ≤250 ps skew.

How are the LVPECL outputs of the 85322AMLF terminated?

The 85322AMLF LVPECL outputs (Q0/nQ0 and Q1/nQ1) must be terminated to VCC – 2V using 50 Ω resistors per leg, as specified in the datasheet's AC test circuits and application information. This termination establishes the correct common-mode voltage and ensures 0.65–1.0 Vpp differential swing. Failure to implement this exact termination results in degraded signal integrity, increased jitter, and potential non-compliance with LVPECL interface standards.

Does the 85322AMLF require external pull-up or pull-down resistors on its clock inputs?

No, the 85322AMLF includes internal 51 kΩ pull-up resistors on both CLK0 and CLK1 inputs, as confirmed in Table 2 (Pin Characteristics) of the datasheet. These resistors establish valid logic-high states for LVTTL/LVCMOS inputs and eliminate the need for external biasing components-reducing bill-of-materials cost and PCB layout complexity while maintaining compatibility with open-drain or high-impedance clock sources.

What is the maximum operating frequency of the 85322AMLF at 2.5V supply?

At 2.5V supply (VCC = 2.5V ±5%), the 85322AMLF supports a maximum output frequency of 215 MHz, as specified in Table 4B (AC Characteristics). This is lower than its 267 MHz capability at 3.3V due to reduced drive strength and propagation delay increase (0.8–2.0 ns vs. 0.6–1.8 ns). Designers must verify timing margins against target clock rates when operating in 2.5V mode.

Is the 85322AMLF pin-compatible with other members of the 8532x family?

Yes, the 85322AMLF shares identical pinout and package (8-pin SOIC M-suffix) with other variants in the 8532x family, including the 85321 and 85323. However, functional differences exist: the 85321 is single-output, and the 85323 adds enable control. Pin compatibility enables drop-in replacement for footprint reuse, but designers must validate electrical behavior-including skew, frequency limits, and input/output configurations-against the specific variant's datasheet.