ST7540
half-duplex synchronous and asynchronous FSK modem for power-line communications
Key details
| Part Number | ST7540 |
|---|---|
| Manufacturer | STMicroelectronics |
| Category | Power Line Transceiver |
| Lifecycle Status | Obsolete |
| Series | ST7540 |
| Package / Case | 28-lead exposed-pad HTSSOP, tube |
| Pin Count | 28 |
| Operating Temperature | -40°C to +85°C |
| Last Verified | 2026-08-04 |
Part information
ST7540 Overview
ST7540 is a STMicroelectronics half-duplex synchronous and asynchronous FSK modem for power-line communications supplied in 28-lead exposed-pad HTSSOP, tube. This page uses the exact orderable code because package, grade, temperature and option suffixes can change compatibility.
Key Technical Specifications
| Verified Ordering Code | ST7540 |
|---|---|
| Main Supply Voltage | 7.5 V to 13.5 V |
| Programmable Baud Rate | up to 4800 bps |
| Transmission Frequencies | 8 programmable frequencies |
| Receiving Sensitivity | up to 250 µVrms |
| Host Interface | UART or SPI |
Package and Ordering Notes
The listed package is 28-lead exposed-pad HTSSOP, tube with 28 pins, leads, lands or contacts. The featured image is a generic package illustration for form-factor identification and is not an actual date-code or lot photograph. Lifecycle is recorded as Obsolete; confirm current factory support and last-time-buy constraints before design-in.
Sourcing Guidance
ST7540 is the manufacturer-verified ordering identity for this record. Confirm package, packing, label traceability, date code, lifecycle, and datasheet revision before ordering.
For an accurate quotation, include the full MPN, target quantity, acceptable date-code range, packaging format and destination. Icearth can help review traceability documents, label photos and electrical/package alignment before order placement.
Manufacturer Documentation
Technical values were checked against STMicroelectronics documentation. Use the linked datasheet as the controlling source and re-check revisions before PCB release or firmware qualification.
Related Product Resources
Browse the STMicroelectronics product archive or the Power Line Transceiver category for precisely classified internal resources. Related family codes are not presented as substitutes unless the manufacturer explicitly identifies them.
ST7540 FAQ
What is ST7540?
ST7540 is a STMicroelectronics half-duplex synchronous and asynchronous FSK modem for power-line communications. The verified manufacturer ordering code is ST7540.
What are the key specifications of ST7540?
Verified Ordering Code is ST7540, while Main Supply Voltage is 7.5 V to 13.5 V. Use the linked manufacturer datasheet for revision-controlled limits and test conditions.
What package does ST7540 use?
ST7540 is supplied in 28-lead exposed-pad HTSSOP, tube with 28 pins, leads, lands or contacts. Verify the manufacturer drawing and packing format before PCB or procurement approval.
What is the lifecycle status of ST7540?
ST7540 is listed by the manufacturer as obsolete or out of production as checked on 2026-08-04. Confirm factory support and availability for the exact order code before ordering.
What should be checked before sourcing ST7540?
Quote ST7540 exactly and confirm package, packing, marking, date code, traceability, lifecycle status, and the controlling datasheet revision. Do not substitute a related family code without an independent electrical and mechanical review.
Lifecycle and sourcing review
This part has a legacy lifecycle status. Submit the exact MPN, quantity, delivery destination and date-code requirements for a sourcing review.
ST7540 is the manufacturer-verified ordering identity for this record. Confirm package, packing, label traceability, date code, lifecycle, and datasheet revision before ordering.