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Analog Devices Inc./Maxim Integrated MAX337CPI+
- Part No.:
- MAX337CPI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MAX337CPI+.pdf
- Description:
- IC MUX DUAL 8:1 400OHM 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,655
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Product details
Overview
MAX337CPI+ from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed to route one of eight differential input pairs (NO1A–NO8A/NO1B–NO8B) to two common bidirectional outputs (COMA/COMB) using a 3-bit binary address. It features ≤400Ω on-resistance, <20pA NO-off leakage at +25°C, and ±4.5V to ±20V dual-supply operation. Used in precision test equipment for low-distortion signal switching.
For engineers reviewing the MAX337CPI+ datasheet, MAX337CPI+ pinout, MAX337CPI+ application, or MAX337CPI+ equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-8-channel mux architecture, real-world leakage and resistance values, and RoHS-compliant DIP-28 package details - all critical for high-accuracy data acquisition and signal routing designs.
Technical Context
The MAX337CPI+ implements a fully bidirectional, rail-to-rail analog switch matrix with independent enable (EN) and 3-bit address decoding (A0–A2) for channel selection. Its BiCMOS process enables guaranteed low charge injection (3.5pC typ) and >2000V ESD protection per Method 3015.7.
All digital inputs are TTL/CMOS-compatible across full temperature range (0°C to +70°C) and supply ranges (±4.5V to ±18V), supporting seamless integration into mixed-signal control systems without level-shifting. The device supports both single-supply (+4.5V to +30V, V− tied to GND) and dual-supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8-channel: two independent 8:1 muxes (A-side and B-side), each with dedicated COM output |
| On-Resistance (max) | 400Ω at TA = +25°C, VCOM = ±10V - ensures minimal signal attenuation and gain error in precision instrumentation |
| NO-Off Leakage (max) | 20pA at +25°C - preserves integrity of high-impedance sensor signals and reference nodes |
| Charge Injection (typ) | 3.5pC - limits voltage glitch on sampled-hold capacitors in data acquisition front-ends |
| Supply Range | ±4.5V to ±20V dual or +4.5V to +30V single - supports industrial bipolar and battery-powered unipolar systems |
| Transition Time (max) | 500ns - enables reliable switching in sub-microsecond timing-critical test sequences |
| ESD Protection | >2000V HBM - reduces risk of field failure during handling and board-level integration |
Pinout & Package
MAX337CPI+ uses a 28-pin plastic DIP package (0°C to +70°C operating range), lead(Pb)-free and RoHS-compliant. Pin layout supports dual independent 8:1 analog mux paths with shared address/enable logic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply voltage input | Accepts +4.5V to +30V (single) or up to +20V (dual); powers internal logic and switch drivers |
| V− | Negative supply voltage input | Accepts −4.5V to −20V (dual); tied to GND for single-supply operation |
| GND | Logic ground reference | Reference for TTL/CMOS inputs; must be connected even in dual-supply mode |
| EN | Global enable input | Active-high; disables all switches when low (high-impedance off-state) |
| A0–A2 | 3-bit binary address inputs | Selects one of eight channels per side (A/B); TTL/CMOS-compatible over full temp/supply range |
| COMA, COMB | Bidirectional common outputs | Analog signal outputs for A-side and B-side muxes; rail-to-rail capable |
| NO1A–NO8A, NO1B–NO8B | Bidirectional analog inputs | Eight differential input pairs; interchangeable as inputs or outputs; matched on-resistance |
| N.C. | No internal connection | Pins 2, 3, 13 - unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail® signal handling | Supports analog signals from V− to V+ without clipping - essential for full dynamic range in ±15V systems |
| Guaranteed low charge injection | 3.5pC typical - minimizes sampling errors in precision ADC front-ends and sample-and-hold circuits |
| Pin-compatible upgrade path | Direct replacement for DG507 - enables drop-in performance improvement without PCB redesign |
| Bidirectional conduction | Equal on-resistance and leakage in either direction - simplifies system-level signal flow design |
| TTL/CMOS logic compatibility | Valid input thresholds (0.8V/2.4V) maintained across full supply (±4.5V to ±18V) and temperature (0°C to +70°C) |
Applications
| Precision Test Equipment | Automated Calibration Systems |
|---|---|
Use Scenario: Switching between multiple calibrated reference voltages and DUT inputs in automated test fixtures. IC Role / Device Role / Timing Role: Dual 8:1 analog mux providing independent routing for reference and measurement paths with sub-500ns settling. Use Value: ≤400Ω on-resistance match and <20pA leakage ensure traceable accuracy better than 0.01% in metrology-grade setups. | Use Scenario: Multiplexing sensor outputs and excitation sources across multi-channel calibration stations. IC Role / Device Role / Timing Role: Bidirectional signal router enabling simultaneous sourcing and sensing on same pins, controlled via shared A0–A2 bus. Use Value: Rail-to-rail operation and ±20V dual-supply support allow direct interface with 24-bit delta-sigma ADCs and precision DACs. |
| Medical Instrumentation Signal Path | Industrial Data Acquisition Front-End |
Use Scenario: Selecting among ECG, EEG, and EMG electrode inputs prior to programmable-gain amplification. IC Role / Device Role / Timing Role: Low-leakage analog switch isolating high-impedance biopotential sources during channel scanning. Use Value: <20pA NO-off leakage prevents DC offset drift and preserves signal integrity in microvolt-level measurements. | Use Scenario: Routing thermocouple, RTD, and strain gauge signals to a shared sigma-delta ADC in PLC modules. IC Role / Device Role / Timing Role: Precision multiplexer with matched on-resistance (<10Ω) minimizing channel-to-channel gain variation. Use Value: ≤10Ω RON matching ensures consistent scaling across 16 total channels (two MAX337CPI+ devices), reducing calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX337CWI+ | Same electrical specs, 28-pin wide SO package (vs. DIP); lower profile, surface-mount compatible | Suitable for space-constrained PCBs; requires reflow assembly instead of through-hole | Select for volume production where automated assembly and board density are priorities |
| ADG507AKNZ | Pin-compatible but higher on-resistance (450Ω max), no guaranteed charge injection spec, 1500V HBM ESD rating | Acceptable for non-critical industrial muxing; not recommended for sub-pA leakage or low-glitch DAQ | Choose only if legacy ADG507 footprint reuse is mandatory and leakage/charge specs are relaxed |
Compared with MAX337CPI+, the MAX337CWI+ offers identical performance in a surface-mount package for modern layouts, while the ADG507AKNZ provides mechanical compatibility at the cost of higher leakage, reduced ESD robustness, and unguaranteed charge injection - making it unsuitable for precision metrology or medical signal chains.
Availability
MAX337CPI+ is available at Aetrix Electronics and suitable for precision test equipment, automated calibration systems, medical instrumentation signal path, and industrial data acquisition front-end requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant through-hole packaging.
Supply support for MAX337CPI+ 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) designs high-performance analog, mixed-signal, and power-management ICs for demanding industrial, medical, and test applications.
The MAX336/MAX337 product line was engineered specifically for ultra-low-leakage, low-charge-injection analog multiplexing in precision data acquisition and automated test equipment - prioritizing signal fidelity over speed or integration density.
FAQ
What is the maximum allowable supply voltage range for MAX337CPI+?
The MAX337CPI+ supports dual supplies from ±4.5V to ±20V, or a single supply from +4.5V to +30V (with V− tied to GND). Absolute maximum ratings specify V+ to V− differential ≤44V and V+ to GND ≤44V. Exceeding these may cause permanent damage. Operation outside the specified range invalidates parametric guarantees including on-resistance and leakage.
Does MAX337CPI+ support bidirectional signal flow?
Yes, MAX337CPI+ supports fully bidirectional analog signal flow on all NOx and COM terminals. Its CMOS switch architecture provides symmetrical on-resistance and leakage characteristics regardless of signal direction - enabling use as a mux, demux, or analog crosspoint in both sourcing and sinking configurations without performance penalty.
Is MAX337CPI+ pin-compatible with the DG507?
Yes, MAX337CPI+ is explicitly documented as a pin-compatible upgrade for the industry-standard DG507. All pin functions, numbering, and electrical interfaces match, allowing direct replacement without PCB modification. Key improvements include lower on-resistance (400Ω vs. 450Ω max), lower leakage (<20pA vs. <50pA), and enhanced ESD protection (>2000V vs. 1500V).
What is the guaranteed charge injection specification for MAX337CPI+?
The MAX337CPI+ has a typical charge injection of 3.5pC and a maximum of 10pC (tested at CL = 100pF, VNO = 0V, RS = 0Ω, TA = +25°C). This parameter is guaranteed by design and directly impacts voltage glitch magnitude in sample-and-hold and switched-capacitor circuits - critical for maintaining accuracy in high-resolution data acquisition systems.
Can MAX337CPI+ operate from a single +12V supply?
Yes, MAX337CPI+ operates from a single +12V supply when V− is connected to GND. In this configuration, the analog signal range is 0V to +12V (not rail-to-rail beyond supply rails), and on-resistance increases slightly (typ. 460Ω at VCOM = 3V). Transition time extends to 350–600ns, and leakage remains within spec - making it viable for compact, low-voltage industrial sensors and portable test gear.
MAX337CPI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 400Ohm
- Channel-to-Channel Matching (ΔRon):
- 5Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 20V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 500ns, 500ns
- -3db Bandwidth:
- -
- Charge Injection:
- 3.5pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 20pA
- Crosstalk:
- -86dB @ 100kHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-PDIP
MAX337CPI+ FAQ
1.How can I place an order for MAX337CPI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX337CPI+ 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 MAX337CPI+ reliable?
The price and inventory of MAX337CPI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX337CPI+ is usually 5 days.
3.What payment methods are accepted for MAX337CPI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX337CPI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX337CPI+?
MAX337CPI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX337CPI+ 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 MAX337CPI+?
For technical support, including MAX337CPI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX337CPI+ requirements.
6.How does Aetrix verify that MAX337CPI+ is sourced from the original manufacturer or authorized distributors?
All MAX337CPI+ 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 MAX337CPI+ meets industry standards.
7.What is the process for return or replacement of MAX337CPI+?
All MAX337CPI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX337CPI+, 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 MAX337CPI+ part is unused and in its original packaging.
Return procedure for MAX337CPI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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