100325SC

Overview

The onsemi 100325SC is a low-power hex ECL-to-TTL translator housed in a 24-lead Small Outline Integrated Circuit (SOIC) package. It converts F100K logic levels to TTL logic levels using differential inputs that support inverting, non-inverting, or differential receiver configurations. The device includes an internal reference voltage generator for single-ended operation and Schmitt trigger applications, along with 50k pull-down resistors on all inputs. It operates within a VEE range of -4.2V to -5.7V and VTTL range of +4.5V to +5.5V. Propagation delays are specified at 0.80ns to 4.00ns depending on load capacitance.

Feature Summary

• Hex configuration providing six independent translation channels
• Differential inputs with built-in offset for flexible signal reception
• Internal reference voltage generator supporting single-ended and Schmitt trigger modes
• Standard FAST outputs ensuring compatibility with TTL logic families

Applications

• Converting F100K logic levels to TTL logic levels
• Inverting, non-inverting, or differential receiver circuits
• Schmitt trigger applications utilizing the internal reference voltage

Procurement Notes

Verify the specific suffix 'SC' corresponds to the 24-lead SOIC package variant when sourcing. Confirm whether commercial or industrial temperature grade requirements apply, as specifications vary between 0°C to +85°C and -40°C to +85°C ranges. Ensure power supply sequencing allows VEE and VTTL application in either order without damage. Check for tape and reel availability by appending the 'X' suffix if required for automated assembly processes.

Selection Notes

Select this component when interfacing ECL-based systems with TTL logic domains requiring low power consumption. The 100325 offers a 50% power reduction compared to the 100125 while maintaining pin and AC specification compatibility. Consider the SOIC package dimensions for PCB layout constraints. Verify input threshold voltages align with the specific ECL source levels, noting the slight positive shift in apparent threshold for true inputs during single-ended operation.

Part Context

Originally manufactured by Fairchild Semiconductor, this part is now part of the onsemi portfolio following corporate acquisitions. The 100325 belongs to a family of logic translators designed to bridge different logic families. It serves as a direct functional replacement for the 100125 in many designs, offering improved power efficiency without altering the physical footprint or electrical interface characteristics of the original circuit.

Replacement Considerations

The 100325 is functionally compatible with the 100125, meeting its AC specifications and offering reduced power consumption. Designers replacing the 100125 should verify that the lower power draw does not impact existing biasing networks. Other variants include the 100325PC (PDIP) and 100325QI/QC (PLCC), which share identical electrical characteristics but differ in package form factor.