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MAX208CDB
Texas Instruments
IC TRANSCEIVER FULL 4/4 24SSOP
67062 Pcs New Original In Stock
4/4 Transceiver Full RS232 24-SSOP
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5.0 / 5.0
- (464 Ratings)
MAX208CDB
Product Overview
1316795
DiGi Electronics Part Number
MAX208CDB-DGManufacturer
Texas Instruments
MAX208CDB
Description
IC TRANSCEIVER FULL 4/4 24SSOPInventory
67062 Pcs New Original In Stock
4/4 Transceiver Full RS232 24-SSOP
Quantity
Minimum 1
Minimum 1
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MAX208CDB Technical Specifications
Category
Interface, Drivers, Receivers, Transceivers
Packaging
Tube
Series
-
Product Status
Obsolete
Type
Transceiver
Protocol
RS232
Number of Drivers/Receivers
4/4
Duplex
Full
Receiver Hysteresis
500 mV
Data Rate
120Kbps
Voltage - Supply
4.5V ~ 5.5V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-SSOP (0.209", 5.30mm Width)
Supplier Device Package
24-SSOP
Base Product Number
MAX208
Datasheet & Documents
HTML Datasheet
MAX208CDB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-26137-5
MAX208CDB-DG
Standard Package
60
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Je suis ravi de la qualité de leur service après-vente, ils prennent soin de leurs clients.
Dec 02, 2025
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Dec 02, 2025
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Frequently Asked Questions (FAQ)
Can I use the MAX208CDB as a direct replacement for the ADM208ARSZ in a full-duplex RS232 interface without signal integrity issues?
Yes, the MAX208CDB can replace the ADM208ARSZ in most full-duplex RS232 applications, but verify voltage thresholds and loading. While both support 4/4 drivers/receivers and 120kbps data rates, the MAX208CDB has a tighter receiver hysteresis of 500mV, improving noise margin. However, the ADM208ARSZ may offer better ESD protection in some variants. Check PCB layout compatibility—24-SSOP footprints are generally interchangeable, but confirm pinouts differ: MAX208CDB uses charge-pump-based level shifting, so ensure external capacitors (typically 0.1µF) are correctly placed to avoid startup delays or rail collapse under load.
What are the key design-in risks when using the MAX208CDB in a new industrial control system given its obsolete status?
Using the MAX208CDB in new designs carries significant supply chain risks due to its obsolete status. While 66,966 pcs are available now, long-term availability is uncertain, risking production interruptions. Designers should either secure lifetime buys or plan for drop-in replacements like the SP208EEA-L/TR. Consider redesign costs later if obsolescence forces a change. Also, verify second-source availability—MAX208CDB lacks modern enhancements like auto-powerdown or enhanced ESD protection found in newer transceivers. Factor in extended testing for MTBF since no future revisions or reliability updates are expected.
How does the MAX208CDB perform in mixed-voltage systems where the MCU runs at 3.3V but RS232 levels require 5V signaling?
The MAX208CDB requires a 4.5V to 5.5V supply and does not support direct 3.3V logic interfacing on its CMOS/TTL side. If your MCU runs at 3.3V, you must add level shifting (e.g., TXB0104 or discrete MOSFETs) on control lines (e.g., /SHUTDOWN, RTS) to ensure reliable logic-high recognition. Note that while the MAX208CDB generates RS232-compliant ±9V signals via internal charge pump, undervoltage operation risks inadequate RS232 swing, leading to interoperation failures with legacy equipment. Test worst-case timing margins under low VCC conditions.
What PCB layout and decoupling practices minimize noise coupling in MAX208CDB-based RS232 designs operating near sensitive analog circuits?
To reduce noise in MAX208CDB designs, place four 0.1µF ceramic capacitors (C1–C4) as close as possible between VCC, V+, V–, and GND pins with minimal trace length. The charge pump generates switching noise; poor placement can couple ripple into adjacent analog stages. Use a solid ground plane and avoid routing RS232 signal lines under the device. Route driver and receiver lines away from high-impedance nodes. Additionally, consider adding series resistors (22–47Ω) at driver outputs to damp ringing. Shielding or differential signaling isn't supported by RS232, so physical separation and filtering at the connector are essential for EMI compliance.
Is the MAX208CDB suitable for high-reliability applications like medical devices considering its operating temperature range and hysteresis specs?
The MAX208CDB is limited to 0°C to 70°C operating temperature, making it unsuitable for medical devices that must operate in sub-zero or uncontrolled environments. Its 500mV receiver hysteresis provides reasonable noise immunity but lacks the extended ESD protection (±15kV) or fail-safe features in newer RS232 transceivers like the MAX3232. For medical use, reliability concerns include lack of extended temperature grades and obsolete status—risking field failure due to aging stock. If used, conduct accelerated life testing on received lots and validate performance at temperature extremes beyond datasheet bounds to ensure safety margins.
Quality Assurance (QC)
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MAX208CDB CAD Models
Texas Instruments MAX208CDB PCB symbols & footprints
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