MAX13487EESA Drop-In Replacement Guide:
Cosine COS13487EESA Engineering Migration
Executive Engineering Verdict (BLUF): COS13487EESA is a 100% pin-compatible, drop-in replacement for MAX13487EESA in an SOP-8 package. It provides identical auto-direction state machine logic, 4.5V to 5.5V supply range, 500 kbps data rate, and ±15kV HBM ESD protection without firmware or PCB trace redesign. Available now for immediate sample dispatch with 4-week mass production delivery.
Side-by-Side Electrical Parametric Delta Matrix
Comparing published electrical boundaries, pin ratings, and thermal parameters between Maxim Integrated / Analog Devices MAX13487EESA and Cosine COS13487EESA.
Hardware Migration & Drop-In Checklist
Detailed board-level verification checklist for hardware design engineers transitioning to Cosine COS13487EESA.
1. Pinout Verification (100% Direct Match)
The solder footprint, mechanical pitch (1.27mm), and pin functions of Cosine COS13487EESA strictly conform to the industry-standard JEDEC SOP-8 (JEDEC MS-012) specification. No PCB traces or vias require modification.
| Pin 1 | RO | Receiver Output (TTL/CMOS levels) |
| Pin 2 | RE | Receiver Enable (Active Low, internally pulled down) |
| Pin 3 | DE | Driver Enable (Active High, auto-direction controlled) |
| Pin 4 | DI | Driver Data Input (Triggers auto-direction state machine) |
| Pin 5 | GND | Ground Reference |
| Pin 6 | A | Non-Inverting RS-485 Differential Bus Line |
| Pin 7 | B | Inverting RS-485 Differential Bus Line |
| Pin 8 | VCC | Positive 5V Power Supply Input (0.1uF bypass required) |
2. Decoupling & Peripheral Passive Rules
- Bypass Capacitor: Keep existing 0.1 µF (100 nF) X7R ceramic capacitor placed within 3 mm of the power pin.
- Ground Plane: Direct solid ground return plane beneath the IC minimizes parasitic loop inductances.
- Differential Routing: Symmetrical trace width and spacing for high-frequency differential bus pairs.
- Hot-Swap Sequencing: Integrated on-chip hot-plug glitch suppression eliminates transient bus contention during live card insertion.
Our FAE engineering team offers free 24-hour review of your schematic and Gerber files to guarantee 100% plug-and-play migration success.
Why Upgrade from MAX13487EESA to Cosine COS13487EESA?
Eliminate 26+ week allocation lead times with stable domestic wafer banking.
Fabricated across TSMC, SMIC, and Hua Hong Semiconductor for supply resilience.
Direct factory-level pricing without multi-tier distributor markup.
Engineering FAE Migration FAQ
Does replacing MAX13487 with COS13487 require MCU firmware changes?
No. The internal auto-direction state machine operates transparently on data edge transitions on DI, requiring zero driver/receiver firmware changes or software rework.
What bypass capacitor is recommended for the VCC pin?
A standard 0.1uF (100nF) ceramic surface-mount capacitor placed within 3mm of Pin 8 and Pin 5 provides optimal high-frequency ripple filtering.
Can COS13487 co-exist on the same RS-485 bus with original MAX13487 devices?
Yes. Both devices share identical 1/8 unit load input impedances and balanced differential voltage levels, enabling seamless multi-drop network interoperation.
What is the standard production lead time and minimum order quantity?
Standard tape-and-reel (2,500 pcs/reel) lead time is 4 to 6 weeks, supported by continuous wafer banking. Free engineering evaluation samples ship within 24 to 48 hours.
Ready to Validate COS13487EESA in Your Next Hardware Spin?
Contact our senior applications team today. We dispatch free qualification sample reels and provide complete laboratory HTOL, ESD, and thermal stress test reports.