Renesas TSE2002GB2A1NCG

Overview

TSE2002GB2A1 from Integrated Device Technology (IDT) is a digital temperature sensor with integrated 256-byte serial EEPROM, designed for DDR2/DDR3 DIMM modules requiring JEDEC JC42.4-compliant thermal monitoring and SPD data storage. It delivers ±0.5°C accuracy from +75°C to +95°C, supports I²C/SMBus up to 400 kHz, and features an open-drain EVENT pin for memory throttling or microprocessor interrupt signaling.

For engineers reviewing the TSE2002GB2A1 datasheet, TSE2002GB2A1 pinout, TSE2002GB2A1 application, or TSE2002GB2A1 equivalent, key selection considerations include its dual-function architecture (temperature sensing + SPD EEPROM), programmable resolution (0.0625°C–0.5°C), hysteresis options (0/1.5/3/6°C), SMBus timeout compliance (25–35 ms), and PSON-8 (DFN-8) package compatibility with memory module space constraints.

Technical Context

The TSE2002GB2A1 integrates two independent functional blocks: a sigma-delta ADC-based temperature sensor with configurable conversion resolution (9–12 bit) and a 2Kbit (256×8) EEPROM organized as one block with software write protection. Its I²C/SMBus interface uses three device-type identifiers (0011b for TS registers, 1010b for SPD memory, 0110b for write-protection commands) and leverages SA0–SA2 pins to set 3-bit slave address bits, enabling up to eight devices on one bus.

Temperature event signaling operates in three modes-Interrupt, Comparator, or Critical-Only-controlled via configuration registers and modulated by user-defined upper/lower/critical limits and hysteresis. The EVENT pin's open-drain output requires external pull-up and supports active-high or active-low polarity, with self-clearing behavior in Comparator Mode and latched assertion in Interrupt Mode until cleared via status register write.

Key Specifications

Pinout & Package

Package: PSON-8 (also labeled DFN-8 or TDFN-8), 2 mm × 3 mm, 0.5 mm pitch, exposed thermal pad (pin 4 = VSSSPD ground).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature-sensing-with-SPD-EEPROM applications.

Compared with AT30TS74-MA8Y and LM75BIMM/NOPB, the TSE2002GB2A1 uniquely integrates JEDEC-compliant temperature sensing, SPD EEPROM, and configurable EVENT signaling in a single PSON-8 package - eliminating design complexity and ensuring drop-in compatibility in DDR2/DDR3 memory modules.

Availability

TSE2002GB2A1 is available at Aetrix Electronics and suitable for DDR2/DDR3 DIMM modules, server memory subsystems, and industrial edge controllers requiring stable component supply, JEDEC compliance, and integrated thermal + SPD functionality.

Supply support for TSE2002GB2A1 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

Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019. IDT pioneered JEDEC-compliant thermal sensors for memory modules.

The TSE2002GB2A1 belongs to IDT's temperature sensor + SPD EEPROM product line, engineered specifically for DDR2/DDR3 DIMM modules to meet JEDEC JC42.4 requirements for thermal monitoring and serial presence detect data storage.

FAQ

What is the primary application of the TSE2002GB2A1?

The TSE2002GB2A1 is primarily used in DDR2 and DDR3 memory modules as a JEDEC JC42.4-compliant digital temperature sensor with integrated 256-byte SPD EEPROM. It provides accurate thermal monitoring (±0.5°C from +75°C to +95°C) and stores critical DRAM configuration data such as access speed, size, and organization. Its EVENT pin enables direct integration into memory throttling systems, making the TSE2002GB2A1 essential for thermal management in servers, laptops, and high-performance computing platforms.

Does the TSE2002GB2A1 support SMBus timeout functionality?

Yes, the TSE2002GB2A1 fully supports SMBus timeout functionality with guaranteed 25 ms minimum and 35 ms maximum timeout periods. This feature is active in all operational modes-including active temperature sensing, EEPROM standby, and sensor shutdown-and ensures robust bus recovery during EEPROM write cycles or communication faults. The timeout capability is verified per SMBus specification and is critical for reliable operation in server and industrial memory subsystems where bus contention must be resolved deterministically.

How is write protection implemented in the TSE2002GB2A1's EEPROM?

The TSE2002GB2A1 implements three software-controlled write protection mechanisms for its 256-byte EEPROM: Set Write Protection (SWP), Clear Write Protection (CWP), and Permanently Set Write Protection (PSWP). SWP and CWP are reversible and persist across power cycles, while PSWP permanently locks the lower 128 bytes (0x00–0x7F) - commonly used for SPD data - against any future writes. These functions require specific I²C command sequences and voltage levels on SA0 (e.g., ≥7 V for SWP/CWP), ensuring secure, tamper-resistant storage of critical memory configuration information.

What are the supported I²C/SMBus addressing options for the TSE2002GB2A1?

The TSE2002GB2A1 supports up to eight unique I²C/SMBus addresses via three hardware-selectable pins: SA0, SA1, and SA2. Each pin must be hard-wired to VDDSPD or VSSSPD (not pulled via resistors) to define a 3-bit slave address extension. Combined with device-type identifiers (0011b for temperature registers, 1010b for SPD memory, 0110b for write-protection commands), this enables concurrent access to temperature data, SPD storage, and protection settings on the same bus - allowing up to eight TSE2002GB2A1 devices to coexist without address conflict in multi-DIMM systems.

Can the EVENT pin of the TSE2002GB2A1 operate in both active-high and active-low configurations?

Yes, the EVENT pin of the TSE2002GB2A1 can be configured for either active-high or active-low operation via a dedicated polarity bit in the configuration register. In active-low mode, the open-drain pin pulls low when a temperature limit is exceeded; in active-high mode, it requires point-to-point wiring to avoid masking by other devices on a shared bus. The pin supports three functional modes - Interrupt (latched until cleared), Comparator (self-clearing), and Critical-Only (asserted only above TCRIT limit minus hysteresis) - giving system designers flexibility to match host controller interface requirements without external logic.