Diodes Incorporated TRAC-S1Q16

Overview

TRAC-S1Q16 from Zetex plc is a TRAC® Support Circuit designed to automate power-up programming of Totally Reconfigurable Analog Circuit (TRAC) devices. It integrates rail-splitting, supply monitoring, thermal shutdown, and programmable clock generation for serial EEPROM-based configuration loading. Key confirmed parameters: 5V ±0.2V operating supply, AGND_OUT adjustable from 2.0V–2.5V, CLK_OUT frequency 7–15 kHz (capacitor-tuned), RESET_OUT threshold 4.35–4.75 V, and industrial -40°C to +85°C operation.

For engineers reviewing the TRAC-S1Q16 datasheet, TRAC-S1Q16 pinout, TRAC-S1Q16 application, or TRAC-S1Q16 equivalent, this device serves as the dedicated interface between serial-output memory (e.g., 93LC46B) and cascaded TRAC analog ICs-enabling automatic, synchronized, and fault-protected configuration boot in reconfigurable analog signal processing systems.

Technical Context

The TRAC-S1Q16 implements a structured analog system boot architecture: its on-chip oscillator generates CLK_OUT and NOT CLK_OUT (inverted), with frequency set by an external capacitor (2.2 nF typical); DATA_OUT is derived by dividing CLK_OUT by four to drive serial memory data clocks. The SETV input configures AGND_OUT voltage with ±10 mV accuracy under no load and ±10 mV droop at ±20 mA sink/source.

Its supply monitor uses a precision ZSM560-based circuit to assert RESET_OUT during power ramp-up and after brownout recovery (4.35 V rising threshold, 4.65 V falling threshold, 20 mV hysteresis). CLCR_IN acts as a cascade termination signal: when pulled low by the final TRAC device, it halts CLK_OUT and DATA_OUT automatically.

Key Specifications

Pinout & Package

TRAC-S1Q16 is housed in a QSOP16 package (4.80 mm × 3.81 mm body, 0.635 mm lead pitch), with gull-wing leads and pin 1 marked by recessed corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TRAC support circuit applications.

Compared with ZXTR2005 and MAX6326, TRAC-S1Q16 uniquely integrates rail-splitting, programmable clocking, cascade-aware termination, and memory interface logic into a single QSOP16 device-making it irreplaceable for production TRAC-based reconfigurable analog systems requiring autonomous, EEPROM-driven startup.

Availability

TRAC-S1Q16 is available at Aetrix Electronics and suitable for industrial sensor conditioning, reconfigurable analog front-end prototyping, and modular analog I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for TRAC-S1Q16 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Zetex plc (now part of Diodes Incorporated) was a UK-based analog semiconductor specialist focused on high-performance discrete and mixed-signal ICs for industrial and automotive markets.

TRAC-S1Q16 belongs to the TRAC® Support Circuit product line, engineered specifically to enable rapid, reliable, and self-contained configuration boot of Totally Reconfigurable Analog Circuits in field-deployable analog signal processing systems.

FAQ

What is the role of the CLCR_IN pin?

CLCR_IN is an active-high input that enables CLK_OUT and DATA_OUT. When pulled low by the final TRAC device in a cascade, it signals completion of configuration loading and causes TRAC-S1Q16 to automatically stop clocking. This eliminates need for external timing or handshaking logic.

Can TRAC-S1Q16 drive more than one TRAC device?

Yes-its AGND_OUT output is rated for ±20 mA and designed to power up to four TRAC devices and associated circuitry. The SELECT, CLK_OUT, and NOT CLK_OUT outputs are also buffered to support cascaded configurations without fanout limitations.

How is the AGND_OUT voltage set and stabilized?

AGND_OUT voltage is set by applying a DC voltage to the SETV pin via a resistor divider. A 100 nF capacitor between AGND_OUT and VSS is mandatory for stability under load. Output accuracy is ±10 mV at no load and maintains ±10 mV regulation at ±20 mA sink/source.

Which memory devices are verified compatible with TRAC-S1Q16?

ST9346CB1 (SGS-Thomson), 93LC46B (Microchip), and NM92C46 (National Semiconductor) are explicitly listed in the datasheet as compatible serial-output EEPROMs. All use Microwire-compatible 3-wire interfaces and respond correctly to SELECT, CLK_OUT, and DATA_OUT timing.