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Analog Devices Inc./Maxim Integrated MAX303CPE
- Part No.:
- MAX303CPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX303CPE.pdf
- Description:
- IC SWITCH SPDT X 2 35OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,754
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Product details
Overview
MAX303CPE from Maxim Integrated is a precision dual SPDT analog switch with two normally open (NO) and two normally closed (NC) poles, designed for high-accuracy signal routing in bipolar or single-supply systems. It delivers <35Ω on-resistance (typ. 22Ω), <2Ω channel-to-channel matching, <15pC charge injection, rail-to-rail analog signal handling (±15V), and sub-100ns turn-off time. It is used in military radios, test equipment, and guidance systems requiring low distortion and stable switching.
For engineers reviewing the MAX303CPE datasheet, MAX303CPE pinout, MAX303CPE application, or MAX303CPE equivalent, key selection criteria include guaranteed on-resistance flatness (Δ3Ω max), off-leakage <6nA at +85°C, break-before-make timing (10–20ns), TTL/CMOS logic compatibility, and operation across ±4.5V to ±20V or +10V to +30V supplies.
Technical Context
The MAX303CPE implements a monolithic silicon-gate CMOS architecture optimized for precision analog switching. Its dual SPDT topology supports independent control of two signal paths with matched RON and ultra-low charge injection-critical for sample-and-hold and multiplexed data acquisition circuits.
It features fully differential supply support (V+, V−, VL, GND), internal substrate biasing via V+, and logic-level flexibility: TTL-compatible when VL = +5V, or CMOS-compatible when VL ties to V+ or other voltages. All analog terminals (COM, NO, NC) tolerate signals from V− −2V to V+ +2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Dual SPDT (2× NO + 2× NC) |
| On-Resistance (RON) | ≤35Ω max at +25°C; ensures minimal signal attenuation and gain error in precision gain-setting or sensor interface paths |
| RON Matching | ≤2Ω between channels; enables accurate differential signal routing and ratiometric measurements |
| Charge Injection | ≤15pC; limits voltage glitch on sampled capacitors, supporting ≤12-bit accuracy in S/H circuits |
| Off-Leakage Current | ≤6nA at +85°C; preserves DC integrity in high-impedance sensor front-ends and battery-monitoring nodes |
| Switching Speed | tON < 150ns, tOFF < 100ns; supports multiplexing of signals up to ~3MHz without significant settling delay |
| Analog Signal Range | Rail-to-rail: V− to V+; allows full utilization of ±15V supplies in industrial and military signal chains |
Pinout & Package
MAX303CPE is supplied in a 16-pin plastic DIP (P16-1) package with 0.3-inch width and through-hole mounting. Pin functions are validated per Maxim's official pin configuration diagram for the MAX303 DIP/SO variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | COM1, COM2 | Analog common terminals - serve as bidirectional signal paths shared by NO/NC pairs; require low-impedance PCB routing to minimize crosstalk |
| 2–7 | N.C. | No internal connection - must remain unconnected; no pull-up/down or routing required |
| 9, 16 | NC1, NC2 | Analog source terminals (normally closed) - connect to signal sources only when switch is de-asserted; rated for ±15.5V max |
| 10, 15 | IN2, IN1 | CMOS/TTL logic inputs - active-high control; drive with 0.8V/2.4V thresholds; low input current (<1µA) minimizes controller loading |
| 11 | V+ | Positive supply input - also tied to substrate; must be powered first during sequencing to prevent latch-up |
| 12 | VL | Logic supply reference - set to +5V for TTL compatibility; ties to V+ for CMOS-level operation |
| 13 | GND | Negative supply reference - serves as return path for V− and logic ground; separate from analog ground in mixed-signal layouts |
| 14 | V− | Negative supply input - establishes lower analog rail; supports symmetric (±15V) or asymmetric (e.g., +12V/0V) configurations |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports input signals spanning V− to V+ (e.g., ±15V), eliminating level-shifting in wide-dynamic-range instrumentation |
| Guaranteed RON flatness (Δ3Ω max) | Maintains consistent gain and linearity across full signal range - critical for audio, sensor, and DAC output switching |
| Break-before-make timing (10–20ns) | Prevents momentary shorting between NC and NO paths - essential for avoiding signal transients in power-sensitive analog domains |
| Low off-isolation degradation with frequency | 72dB off-isolation at 1MHz ensures >1000:1 signal rejection between inactive channels in RF-adjacent or high-speed multiplexing |
| Single- or split-supply operation | Operates identically on +10V to +30V (single) or ±4.5V to ±20V (bipolar), simplifying power architecture reuse across product variants |
Applications
| Test Equipment Signal Routing | Military Radio Channel Selection |
|---|---|
Use Scenario: Automated test systems route multiple sensor or calibration signals to a shared ADC or waveform generator using programmable switching matrices. IC Role / Device Role / Timing Role: Dual SPDT switch provides isolated, low-distortion path selection under microcontroller or FPGA logic control with precise timing coordination. Use Value: <2Ω RON matching and <15pC charge injection preserve measurement accuracy across channels, enabling <0.01% gain error and <12-bit effective resolution. |
Use Scenario: Secure voice/data radios implement rapid antenna or filter bank switching during frequency hopping or mode reconfiguration. IC Role / Device Role / Timing Role: Precision analog switch routes RF IF signals between filters, mixers, and amplifiers with sub-100ns switching and minimal transient coupling. Use Value: 72dB off-isolation at 1MHz and <6nA leakage at +85°C ensure signal integrity and low spurious emissions in harsh thermal environments. |
| Guidance System Sensor Multiplexing | Heads-Up Display (HUD) Video Path Switching |
Use Scenario: Inertial navigation units aggregate outputs from redundant accelerometers and gyros into a central processor via time-shared sampling. IC Role / Device Role / Timing Role: Dual SPDT configuration enables simultaneous selection of X/Y-axis sensor pairs while maintaining matched gain and phase response. Use Value: Guaranteed RON flatness (Δ3Ω max) and <2Ω inter-channel match eliminate path-dependent offset and scale errors in closed-loop control loops. |
Use Scenario: Automotive or avionics HUDs switch between primary video sources (e.g., camera feed, synthetic vision, symbology generator) without visible artifacts. IC Role / Device Role / Timing Role: High-speed analog switch gates composite video or RGB signals with minimal slew-induced distortion and DC shift. Use Value: Rail-to-rail capability (+15V/−15V) handles full video swing; <100ns tOFF enables seamless source transitions synchronized to frame blanking intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG408BRZ | 8-channel single-pole multiplexer (not SPDT); higher RON (45Ω typ), no guaranteed RON match or charge injection spec | Suited for low-channel-count, non-matched multiplexing where timing and matching are secondary | Select ADG408BRZ only if channel count >2 is needed and precision matching is not required. |
| TS5A23157DGSR | Single SPDT, 5V-only supply; lower RON (0.9Ω), but no bipolar support, no guaranteed flatness or leakage specs above +85°C | Targeted at consumer-grade, single-supply portable electronics-not military, industrial, or wide-temp designs | Choose TS5A23157DGSR only for cost-sensitive, commercial 5V systems with ambient temperature operation. |
Compared with ADG408BRZ and TS5A23157DGSR, the MAX303CPE uniquely combines dual SPDT topology, guaranteed RON matching (<2Ω), rail-to-rail bipolar operation, and qualified performance from 0°C to +70°C-making it irreplaceable in precision, wide-supply, and thermally demanding analog routing.
Availability
MAX303CPE is available at Aetrix Electronics and suitable for test equipment signal routing, military radio channel selection, guidance system sensor multiplexing, and heads-up display video path switching requiring stable component supply across extended temperature and supply-voltage ranges.
Supply support for MAX303CPE 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and defense applications.
The MAX301/MAX303/MAX305 family was engineered specifically for precision analog signal routing in high-reliability systems-emphasizing matched on-resistance, ultra-low charge injection, and robust bipolar supply operation.
FAQ
What is the maximum allowable analog signal voltage range for the MAX303CPE?
The MAX303CPE supports rail-to-rail analog signals from V− to V+, with absolute maximum ratings of (V− − 2V) to (V+ + 2V) on NO, NC, and COM pins. When operated at ±15V supplies, it reliably switches signals from −15V to +15V. Exceeding the ±44V total V+–V− differential risks permanent damage, per Absolute Maximum Ratings.
Does the MAX303CPE require external protection diodes for overvoltage conditions?
The MAX303CPE includes internal clamping diodes, but Maxim recommends external series diodes on V+ and V− if strict power-supply sequencing cannot be guaranteed. This reduces the usable analog range by ~1V but preserves all key specifications-including RON, leakage, and switching speed-as confirmed in the Applications Information section.
Can the MAX303CPE operate with a single +12V supply instead of dual ±15V supplies?
Yes-the MAX303CPE supports single-supply operation from +10V to +30V. With +12V on V+ and 0V on V− (and GND tied to V−), it switches analog signals from 0V to +12V. Logic inputs remain compatible when VL = +5V, and all key specs-including <35Ω RON and <15pC charge injection-are maintained per Electrical Characteristics tables.
What is the guaranteed on-resistance flatness specification for the MAX303CPE, and why does it matter?
The MAX303CPE guarantees on-resistance flatness of Δ3Ω maximum across the full analog signal range (V− to V+). This means RON varies by no more than 3Ω regardless of signal voltage-critical for minimizing harmonic distortion and gain nonlinearity in audio, sensor, and DAC output switching applications where signal fidelity is paramount.
How does the MAX303CPE handle logic-level compatibility with both TTL and CMOS controllers?
The MAX303CPE achieves TTL compatibility when VL is fixed at +5V (accepting VINL ≤ 0.8V and VINH ≥ 2.4V), and CMOS compatibility when VL connects directly to V+ or another supply voltage. Input currents remain below ±1µA across temperature, ensuring minimal loading on microcontroller GPIOs or FPGA I/O banks driving the IN1/IN2 pins.
MAX303CPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 10pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF, 12pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -90dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX303CPE FAQ
1.How can I place an order for MAX303CPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX303CPE 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 MAX303CPE reliable?
The price and inventory of MAX303CPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX303CPE is usually 5 days.
3.What payment methods are accepted for MAX303CPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX303CPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX303CPE?
MAX303CPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX303CPE 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 MAX303CPE?
For technical support, including MAX303CPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX303CPE requirements.
6.How does Aetrix verify that MAX303CPE is sourced from the original manufacturer or authorized distributors?
All MAX303CPE 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 MAX303CPE meets industry standards.
7.What is the process for return or replacement of MAX303CPE?
All MAX303CPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX303CPE, 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 MAX303CPE part is unused and in its original packaging.
Return procedure for MAX303CPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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