Renesas X5163S8Z-2.7

Overview

X5163S8Z-2.7 from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 16Kbit SPI EEPROM in an 8-lead SOIC package. It asserts active-low RESET at VCC ≥ 1V, supports selectable watchdog timeout (200 ms/600 ms/1.4 s), features reprogrammable VTRIP threshold (2.55–2.7 V), and operates from 2.7V to 5.5V. It is used in embedded microcontroller systems requiring reliable power sequencing and nonvolatile configuration storage.

For engineers reviewing the X5163S8Z-2.7 datasheet, X5163S8Z-2.7 pinout, X5163S8Z-2.7 application, or X5163S8Z-2.7 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in FN8128 Rev 4.00 and Intersil's official ordering and parametric data.

Technical Context

The X5163S8Z-2.7 implements a dual-function reset architecture: power-on reset activates at 1V and holds RESET low for ≥200ms after VCC stabilizes above its 2.55–2.7V trip point, while brownout detection asserts RESET when VCC falls below that same threshold. Its watchdog timer uses CS/WDI edge detection and nonvolatile WD0/WD1 bits to select fixed timeout intervals - no external components required.

It embeds a 16Kbit (2K × 8) SPI EEPROM with Block Lock™ protection, supporting 32-byte page writes, self-timed 5ms typical write cycles, and direct compatibility with standard SPI mode 0,0 and 1,1 interfaces. The Status Register includes volatile WIP and FLAG bits plus nonvolatile WDx, BLx, WPEN, and FLB bits - all programmable via WRSR instruction under Write Enable Latch control.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (RoHS-compliant, MDP0027 footprint). Pinout matches 8 Ld SOIC/PDIP configuration per FN8128 Rev 4.00 Page 4.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPU supervisor with integrated EEPROM applications.

Compared with MAX6361KA29+T and STM6315SW33DX, the X5163S8Z-2.7 uniquely combines field-reprogrammable VTRIP, three-tier watchdog timeout, and high-endurance EEPROM in one die - reducing system-level BOM count and qualification effort for safety-critical embedded controllers.

Availability

X5163S8Z-2.7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.

Supply support for X5163S8Z-2.7 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

Intersil (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.

The X5163 product line was designed to consolidate power supervision, watchdog safety, and nonvolatile storage into a single chip - targeting cost-sensitive, space-constrained embedded systems needing guaranteed boot integrity and field-configurable reset behavior.

FAQ

What is the factory-set VTRIP voltage for X5163S8Z-2.7?

The X5163S8Z-2.7 ships with a factory-programmed VTRIP range of 2.55V to 2.7V, as specified in the Ordering Information table on FN8128 Rev 4.00 Page 2. This threshold is calibrated for 2.7V nominal supply systems and can be reprogrammed in-circuit using the VP programming sequence described on Pages 5–6 of the datasheet. The X5163S8Z-2.7 maintains this setting across temperature and time without drift.

Does X5163S8Z-2.7 support both active-low and active-high reset outputs?

No - the X5163S8Z-2.7 provides only an active-low open-drain RESET output (pin 7), as confirmed by the Pin Description table (Page 4) and Block Diagram (Page 4) of FN8128 Rev 4.00. The "X5163" designation explicitly indicates active-low reset; the active-high variant is the X5165S8Z-2.7. Both share identical pinout and EEPROM functionality but differ solely in reset polarity.

How is the watchdog timeout period selected on X5163S8Z-2.7?

The watchdog timeout on X5163S8Z-2.7 is selected via two nonvolatile bits (WD0 and WD1) in the Status Register, programmed using the WRSR instruction. Valid combinations yield 200 ms (WD1=1, WD0=0), 600 ms (WD1=0, WD0=1), or 1.4 s (WD1=0, WD0=0); WD1=1, WD0=1 disables the watchdog. These bits retain their value across power cycles and can be locked using the WP pin and WPEN bit.

Can X5163S8Z-2.7's EEPROM be written to while the watchdog is active?

Yes - the X5163S8Z-2.7 allows concurrent EEPROM writes and watchdog operation. The watchdog timer monitors only the CS/WDI pin transitions and is independent of SPI data transfers. During a write cycle, the WIP bit (bit 0 of Status Register) indicates busy status, but the watchdog continues counting and will assert RESET if no CS/WDI edge occurs within the selected timeout interval.

What is the maximum clock frequency supported by X5163S8Z-2.7's SPI interface?

The X5163S8Z-2.7 supports SPI clock frequencies up to 2 MHz, as specified in the AC Electrical Specifications table (Page 13) of FN8128 Rev 4.00. This applies across the full 2.7V–5.5V VCC range and ensures reliable communication with common microcontrollers such as STM32, PIC, and MSP430 families without requiring clock dividers or timing adjustments.