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Analog Devices Inc./Maxim Integrated MAX318EJA
- Part No.:
- MAX318EJA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX318EJA.pdf
- Description:
- IC SW SPSTX1 35OHM 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:350
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Product details
Overview
MAX318EJA from Maxim Integrated is a precision CMOS single-pole single-throw (SPST) analog switch with normally open (NO) configuration, designed for high-fidelity signal routing in rail-to-rail analog paths. It delivers <35Ω maximum on-resistance, <2Ω channel-to-channel match, <10pC charge injection, <6nA off-leakage at +85°C, and operates across -40°C to +85°C in CERDIP packaging - ideal for military radios and precision test equipment where signal integrity and thermal stability are critical.
For engineers reviewing the MAX318EJA datasheet, MAX318EJA pinout, MAX318EJA application, or MAX318EJA equivalent, key selection criteria include guaranteed on-resistance flatness (∆3Ω max), bipolar/single-supply flexibility (+10V to +30V or ±4.5V to ±20V), TTL/CMOS logic compatibility, ESD tolerance >±2000V, and rail-to-rail analog handling up to ±15.5V.
Technical Context
The MAX318EJA implements a silicon-gate CMOS transmission gate architecture optimized for low distortion and minimal transient artifacts. Its control logic accepts standard TTL/CMOS levels at VL input, enabling direct interfacing with microcontrollers and FPGAs without level-shifting.
It supports dual-supply operation (±4.5V to ±20V) with guaranteed matched on-resistance and flatness only under bipolar conditions, while single-supply mode (+10V to +30V) maintains low leakage and fast switching (tON < 175ns, tOFF < 145ns) - making it suitable for battery-powered systems requiring wide dynamic range and low power consumption (35µW typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On Resistance | <35Ω max - ensures minimal voltage drop and signal attenuation in precision analog paths |
| On Resistance Match | <2Ω between channels - enables accurate differential or multi-path signal routing without gain mismatch |
| Charge Injection | <10pC - reduces sampling error and pedestal distortion in sample-and-hold circuits |
| Off-Leakage Current | <6nA at +85°C - preserves DC accuracy and long time-constant integrator stability |
| Switching Speed | tON < 175ns, tOFF < 145ns - supports high-speed multiplexing in automated test equipment |
| ESD Rating | >±2000V per Method 3015.7 - enhances robustness during handling and system integration |
| Analog Signal Range | ±15.5V max - enables full rail-to-rail operation with ±15V supplies in guidance systems |
Pinout & Package
MAX318EJA is housed in an 8-pin CERDIP package (0.300" wide), hermetically sealed for high-reliability operation in extended temperature and harsh environments. Pin 1 is COM (common terminal), Pin 2 is N.C. (no internal connection), Pin 3 is GND (logic ground), Pin 4 is V+ (positive analog supply), Pin 5 is VL (logic supply), Pin 6 is IN (digital control input), Pin 7 is V− (negative analog supply), and Pin 8 is NO (normally open analog terminal).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - COM | Analog common terminal | Signal path junction point; connects to load or downstream circuitry |
| 2 - N.C. | No connect | Unbonded pad; must remain unconnected to avoid parasitic coupling |
| 3 - GND | Logic ground reference | Reference for VL and digital input thresholds; separate from analog ground planes |
| 4 - V+ | Positive analog supply | Sets upper analog signal limit; supports up to +44V absolute max |
| 5 - VL | Logic-level supply | Defines logic threshold; configurable for TTL (5V) or CMOS (V+) compatibility |
| 6 - IN | Digital control input | Active-high logic input; opens switch when high (NO configuration) |
| 7 - V− | Negative analog supply | Sets lower analog signal limit; supports down to −44V absolute min |
| 8 - NO | Normally open analog terminal | Signal output path; connected to COM only when IN = high |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog handling | Supports ±15.5V signal swing with ±15V supplies - eliminates clipping in wide-dynamic-range sensor interfaces |
| Guaranteed on-resistance flatness | ∆3Ω max over full analog range - ensures consistent gain and linearity across input voltage |
| Bipolar- and single-supply operation | +10V to +30V or ±4.5V to ±20V - simplifies power architecture in mixed-signal embedded systems |
| TTL/CMOS logic compatibility | VL pin allows direct interface to 3.3V/5V controllers without external level shifters |
| Low power consumption | 35µW typical - extends battery life in portable test and military communication gear |
Applications
| Sample-and-Hold Circuits | Guidance and Control Systems |
|---|---|
Use Scenario: Precision acquisition of inertial sensor outputs in aerospace navigation units. IC Role / Device Role / Timing Role: SPST switch isolating hold capacitor during sampling phase to prevent charge leakage. Use Value: <10pC charge injection minimizes pedestal error; <6nA off-leakage preserves hold voltage for >10ms intervals. | Use Scenario: Signal routing between gyroscope, accelerometer, and ADC in missile guidance electronics. IC Role / Device Role / Timing Role: High-reliability analog multiplexer enabling redundant sensor path selection. Use Value: CERDIP packaging and -40°C to +85°C rating ensure operation under shock, vibration, and thermal cycling. |
| Heads-Up Displays | Test Equipment |
Use Scenario: Switching video sync and RGB signals in avionics HUD video processors. IC Role / Device Role / Timing Role: Low-distortion signal gate controlling display timing and brightness modulation paths. Use Value: <35Ω on-resistance and flat RON maintain pixel-level fidelity; fast tON/tOFF support 60Hz+ refresh rates. | Use Scenario: Channel selection in automated calibration fixtures for multimeter front-ends. IC Role / Device Role / Timing Role: Precision analog switch in programmable gain and range-setting networks. Use Value: Guaranteed <2Ω RON match enables sub-0.1% gain accuracy across multiple channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1419BRMZ | Single SPST NO switch; 0.9Ω typical RON, but rated only to +125°C and requires ≥±5V dual supply | Higher performance in RON and bandwidth, but lacks CERDIP packaging and MIL-grade reliability | Prefer ADG1419BRMZ for low-RON commercial instrumentation; MAX318EJA remains optimal for extended-temp military use. |
| TS5A3159DCKR | SPST NO switch with 0.75Ω RON, but only rated to +85°C, 5.5V max supply, and no bipolar operation | Targeted at low-voltage portable electronics; incompatible with ±15V rail-to-rail signal chains | Choose TS5A3159DCKR for cost-sensitive consumer designs; MAX318EJA is required for industrial/military bipolar analog systems. |
Compared with ADG1419BRMZ and TS5A3159DCKR, the MAX318EJA uniquely combines CERDIP hermetic packaging, guaranteed ±15.5V rail-to-rail operation, and -40°C to +85°C qualification - making it irreplaceable in high-reliability analog signal routing where environmental resilience and supply flexibility are non-negotiable.
Availability
MAX318EJA is available at Aetrix Electronics and suitable for military radios, guidance and control systems, and precision test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX318EJA 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX317/MAX318/MAX319 family was engineered specifically for precision analog switching in mission-critical systems - emphasizing low charge injection, matched on-resistance, and robust operation across wide supply and temperature ranges.
FAQ
What is the operating temperature range of the MAX318EJA?
The MAX318EJA is specified for operation from -40°C to +85°C. This extended temperature grade is achieved via CERDIP packaging and process hardening, distinguishing it from the commercial-grade MAX318CPA (0°C to +70°C) and enabling deployment in avionics, defense electronics, and industrial control systems where ambient extremes are routine. The MAX318EJA maintains all key specifications - including on-resistance match and leakage current - across this full range.
Does the MAX318EJA support single-supply operation?
Yes, the MAX318EJA supports single-supply operation from +10V to +30V. In this mode, V− must be tied to ground, and VL should be set to +5V for TTL compatibility or to V+ for CMOS logic levels. While on-resistance flatness and matching are guaranteed only under bipolar-supply conditions, key parameters like leakage (<6nA at +85°C), switching speed (<175ns tON), and rail-to-rail analog handling remain fully functional - making the MAX318EJA viable for portable and battery-powered test equipment.
What is the function of Pin 2 (N.C.) on the MAX318EJA?
Pin 2 on the MAX318EJA is labeled N.C. (No Connect) and is not internally bonded or electrically connected to any circuit node. It must remain unconnected in PCB layout to prevent unintended coupling or parasitic capacitance that could degrade high-frequency isolation or increase crosstalk. This pin is structurally present for mechanical symmetry and package compatibility but carries zero electrical function - a detail confirmed in the official pin description table and chip topography diagram for the MAX318EJA.
How does the MAX318EJA differ from the MAX317EJA and MAX319EJA?
The MAX318EJA is the normally open (NO) variant in the MAX317/MAX318/MAX319 family. The MAX317EJA is normally closed (NC), and the MAX319EJA is a single-pole double-throw (SPDT) device with both NC and NO terminals. All three share identical electrical specs (on-resistance, leakage, speed, ESD), package, and temperature rating, but differ exclusively in switch topology and pinout - particularly Pins 7 and 8. The MAX318EJA uses Pin 7 as V− and Pin 8 as NO, whereas MAX317EJA assigns Pin 8 as NC and MAX319EJA splits functionality across both pins.
Is the MAX318EJA pin-compatible with other packages in the same family?
No - the MAX318EJA (8-pin CERDIP) is not pin-compatible with the plastic DIP (MAX318EPA) or SO (MAX318ESA) variants, despite identical pin numbering. While pin functions align, CERDIP has different thermal, mechanical, and sealing characteristics, and its leadframe geometry differs from plastic and SO packages. Layout reuse is not possible without footprint redesign. However, electrical behavior and logic interface are identical across all MAX318x variants, enabling seamless functional substitution when package constraints allow.
MAX318EJA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - Open
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 2Ohm (Max)
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 175ns, 145ns
- -3db Bandwidth:
- -
- Charge Injection:
- 3pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
MAX318EJA FAQ
1.How can I place an order for MAX318EJA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX318EJA 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 MAX318EJA reliable?
The price and inventory of MAX318EJA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX318EJA is usually 5 days.
3.What payment methods are accepted for MAX318EJA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX318EJA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX318EJA?
MAX318EJA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX318EJA 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 MAX318EJA?
For technical support, including MAX318EJA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX318EJA requirements.
6.How does Aetrix verify that MAX318EJA is sourced from the original manufacturer or authorized distributors?
All MAX318EJA 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 MAX318EJA meets industry standards.
7.What is the process for return or replacement of MAX318EJA?
All MAX318EJA units undergo pre-shipment inspection (PSI). If there is an issue with MAX318EJA, 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 MAX318EJA part is unused and in its original packaging.
Return procedure for MAX318EJA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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