SA5217D/01,112

Overview

The SA5217D/01,112 is a 75MHz postamplifier system designed to convert low-level high-speed signals into TTL levels. It features an auto-zeroed first stage with noise shaping, a symmetrical limiting second stage, and a matched rise/fall time TTL output buffer. The device operates on a single 5V supply, typically consuming 40mA. It includes a user-configurable threshold and hysteresis for maximizing signal-to-noise ratio. An auto-zero loop replaces input coupling capacitors, and a signal absent flag indicates low signal conditions.

Feature Summary

• Integrates a wideband postamplifier with a link status indicator and LED driver
• Features an auto-zero loop for DC offset cancellation without input coupling capacitors
• Provides programmable threshold and hysteresis via external resistors
• Includes a low signal flag output that forces the TTL output to the last logic state during jamming

Applications

• Fiber optics receivers
• Communication links in Industrial and/or Telecom environments with high EMI/RFI
• Local Area Networks (LAN)
• Synchronous Optical Networks (SONET) STS-1
• RF limiter applications

Procurement Notes

Verify the specific ordering suffix '01,112' against the manufacturer's current documentation to confirm package type and temperature range specifications. Ensure compatibility with the intended transimpedance amplifier family, such as the SA5210 or SA5211 series, for proper system integration. Confirm RoHS compliance status through official datasheets before procurement.

Selection Notes

Select this component when a highly integrated postamplifier with built-in link status monitoring is required. It is specifically designed to pair with SA5210, SA5211, or SA5212A transimpedance amplifiers. Consider its 75MHz bandwidth and TTL output compatibility for high-speed digital conversion needs in noisy environments.

Part Context

Originally manufactured by Philips Semiconductors, this part is now distributed under NXP USA Inc. branding. It serves as a companion to the SA521x preamplifier family, converting nanoamps of photodetector current into standard digital TTL levels. The device is housed in a 20-pin Plastic Small Outline Large (SOL) package.

Replacement Considerations

The SA5214 is a related model within the same family; however, it differs by providing access to internal amplifier stages A1 and A2, whereas the SA5217 activates the on-chip Schmitt trigger function instead.