Renesas CD22M3494MQZ

Overview

CD22M3494MQZ from Intersil is a 16 × 8 (128-channel) BiMOS-E analog crosspoint switch IC designed for high-fidelity signal routing in mixed-signal systems. It supports DC-to-50 MHz bandwidth, features 36 Ω typical ON resistance at 12 V supply, guarantees ≤10 Ω r_ON mismatch across switches, and operates from 4 V to 15 V dual-supply rails (VDD/VSS/VEE). It is used in PBX voice matrix switching and video multiplexing where low crosstalk (−95 dB feedthrough) and rail-to-rail analog swing are critical.

For engineers reviewing the CD22M3494MQZ datasheet, CD22M3494MQZ pinout, CD22M3494MQZ application, or CD22M3494MQZ equivalent, key selection criteria include its 44-pin PLCC (Mitel-compatible) package, parallel address decoding (AX0–AX3 + AY0–AY2), strobe-controlled latching logic, and guaranteed r_ON matching for precision analog path consistency.

Technical Context

The CD22M3494MQZ implements a 7-to-128 line decoder driving 128 independent BiMOS transmission gates, enabling any X_0–15/Y_0–7 pair connection via parallel address inputs and DATA/STROBE control. Its analog I/O pins support full rail-to-rail voltage swing (VEE to VDD), with digital control logic referenced to VSS (0 V) and analog paths referenced to VEE (typically 0 V or negative).

It uses separate power domains: VDD (positive digital/analog supply), VSS (digital ground), and VEE (analog ground or negative rail), allowing flexible biasing for bipolar analog signals. Chip Select (CS) enables cascading multiple devices into larger matrices without external logic.

Key Specifications

Pinout & Package

CD22M3494MQZ is housed in a 44-lead Plastic Leaded Chip Carrier (PLCC) package, Mitel lead-compatible (JEDEC MS-018AC, pkg drawing N44.65), with 16.51 mm × 16.51 mm body size and 1.27 mm lead pitch. The package is RoHS-compliant and rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog crosspoint switching applications.

Compared with MT8816 and ISL54233, CD22M3494MQZ uniquely delivers guaranteed r_ON matching, 50 MHz bandwidth, and cascade-capable CS pin - making it the only option for high-precision, expandable, and video-grade crosspoint systems requiring deterministic analog performance.

Availability

CD22M3494MQZ is available at Aetrix Electronics and suitable for telecom infrastructure, broadcast video equipment, and automated test instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for CD22M3494MQZ 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

Intersil Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The CD22M3494MQZ belongs to Intersil's legacy BiMOS-E analog switch family, engineered for high-density, low-distortion signal routing in mission-critical telecom and instrumentation systems where reliability and parameter consistency are non-negotiable.

FAQ

What is the maximum operating supply voltage for CD22M3494MQZ?

The CD22M3494MQZ supports a DC supply voltage range of 4 V to 15 V on VDD, with absolute maximum rating of −0.5 V to 16 V referenced to VEE. Operation beyond 15 V is not recommended as it exceeds specified electrical performance limits and may impact long-term reliability. Always maintain VSS = 0 V and ensure VEE is within −0.5 V to VDD − 0.5 V.

Does CD22M3494MQZ support negative analog input voltages?

Yes - CD22M3494MQZ supports analog input voltages from VEE to VDD. By biasing VEE to a negative potential (e.g., −5 V), the device can pass bipolar signals such as ±2.5 V audio or sensor outputs. Digital control inputs (AX, AY, DATA, etc.) remain referenced to VSS = 0 V, so level-shifting is not required for logic interfacing.

How does the RESET function operate in CD22M3494MQZ?

The RESET pin (Pin 3) is active-high: asserting RESET to VDD opens all 128 switches regardless of current address or DATA state. A valid reset pulse requires minimum width of 20 ns (tRPW), followed by return to low (VSS). This provides deterministic, hardware-initiated clearing of the entire crosspoint array - essential for system recovery after fault conditions or power-up initialization.

Can multiple CD22M3494MQZ devices be cascaded, and how is it implemented?

Yes - CD22M3494MQZ supports matrix expansion via the CS (Chip Select) pin (Pin 40). When CS is low, the device is disabled; when high, it responds to ADDRESS and DATA inputs. Cascading is achieved by connecting identical ADDRESS and DATA lines to all devices while driving individual CS lines from a decoder - enabling configurations like 32×8 or 16×16 matrices without external glue logic.

What is the significance of guaranteed r_ON matching in CD22M3494MQZ?

CD22M3494MQZ guarantees Δr_ON ≤10 Ω across all 128 switches over −40°C to +85°C. This ensures uniform insertion loss and channel-to-channel gain tracking - critical in applications like multi-channel data acquisition, automatic calibration systems, and video switchers where mismatch causes visible artifacts or measurement error. Competing parts often specify only typical matching, not guaranteed limits.