The STTS2004 is targeted for DDR4 DIMM modules in servers, desktops, and mobile personal computing platforms (laptops and other industrial applications). The thermal sensor (TS) in the STTS2004 is compliant with the JEDEC specification TSE2004a2, which defines memory module thermal sensor requirements for use in DRAM DIMMs (Dual Inline Memory Modules) with Serial Presence Detect (SPD), in which all the information concerning the DRAM module configuration (such as access speed, size, and organization) can be kept write-protected in one or more of the blocks of memory. The 4-Kbit serial EEPROM (SPD) in the STTS2004 is organized as two pages of 256 bytes each, or 512 bytes of total memory. Each page is comprised of two 128-byte blocks. The SPD is able to selectively lock the data in any or all of the four 128-byte blocks. The STTS2004 can interface to buses which have multiple devices on a shared bus, and each device has its own unique address on this bus. The device can achieve substantial power savings by using the software-programmed shutdown mode.

The TS-SPD EEPROM combination provides space as well as cost savings for mobile and server platform dual inline memory modules (DIMM) manufacturers, as it is packaged in the compact 2 mm x 3 mm 8-lead TDFN package with a thinner maximum height of 0.80 mm. The DN package is compliant to JEDEC MO-229, variation W2030D.

The digital temperature sensor has a programmable 9-12 bit analog-to-digital converter (ADC) which monitors and digitizes the temperature to a resolution of up to 0.0625 °C. The default resolution is 0.25 °C/LSB (10-bit). The typical accuracies over these temperature ranges are: ±2 °C over the full temperature measurement range of –20 °C to 125 °C, ±1 °C in the +40 °C to +125 °C active temperature range, and ±0.5 °C in the +75 °C to +95 °C monitor temperature range.

The temperature sensor in the STTS2004 is specified for operating at supply voltages from 2.2 V to 3.6 V. Operating at 3.3 V, the typical supply current is 160 μA (includes I²C communication current).

The on-board sigma-delta ADC converts the measured temperature to a digital value that is calibrated in °C. For Fahrenheit applications, a lookup table or conversion routine is required. The STTS2004 is factory-calibrated and requires no external components to measure temperature.

The digital temperature sensor component has user-programmable registers that provide the capabilities for DIMM temperature-sensing applications. The open drain event output pin is active when the monitoring temperature exceeds a programmable limit, or it falls above or below an alarm window. The user has the option to set the event output as a critical temperature output. This pin can be configured to operate in either a comparator mode for thermostat operation or in interrupt mode.

The STTS2004 is protocol-compatible with the 2 Kbit SPD in the STTS2002 and uses a page selection method which is applied to the lower or upper pages of the 4 Kbit SPD. Unlike the STTS2002, the STTS2004 does not support the Permanently Set Write Protect (PSWP) feature.

Locking a 128-byte block of the EEPROM is accomplished by using a software write protection mechanism in conjunction with a high input voltage V_HVon the A0 input pin. A specific I²C sequence is used to protect each block from writes until write protection is electrically reversed using a separate I²C sequence which also requires V_HVon input A0 pin of the device.

Write protection for all four blocks is cleared simultaneously, and write protection may be re-asserted after being cleared.

stts2004是針對服務(wù)器、臺(tái)式機(jī)DDR4 DIMM模塊，和個(gè)人移動(dòng)計(jì)算平臺(tái)（筆記本電腦和其它工業(yè)應(yīng)用）。熱傳感器（TS）在stts2004符合JEDEC規(guī)范tse2004a2，它定義了存儲(chǔ)器模塊的熱傳感器的使用要求在DRAM DIMM（雙列直插內(nèi)存模塊）與串行存在檢測（SPD），其中所有的信息有關(guān)的DRAM模塊配置（如訪問速度、大小和組織）可以把寫在一個(gè)或多個(gè)內(nèi)存塊的保護(hù)。的k位串行EEPROM（SPD）在stts2004是組織為256字節(jié)每兩頁，或512字節(jié)的內(nèi)存總量。每一頁都包含2個(gè)128字節(jié)的塊。社民黨能夠選擇性地鎖定數(shù)據(jù)，在任何或所有的四個(gè)128字節(jié)的塊。的stts2004 CAN接口，共享總線上有多個(gè)設(shè)備，每個(gè)設(shè)備都有公共汽車，公共汽車上自己獨(dú)特的地址。該設(shè)備可以實(shí)現(xiàn)節(jié)省大量的功率，通過使用軟件編程關(guān)機(jī)模式。

ts-spd EEPROM的結(jié)合提供了空間，以及移動(dòng)和服務(wù)器平臺(tái)的雙列直插式內(nèi)存模塊（DIMM）生產(chǎn)的成本節(jié)約，因?yàn)樗欠庋b在緊湊的2毫米×3毫米的8引腳TDFN封裝更薄的最大高度為0.80毫米。DN封裝符合JEDEC mo-229，變化w2030d。

數(shù)字溫度傳感器有一個(gè)可編程的9-12位模數(shù)轉(zhuǎn)換器（ADC）和數(shù)字化的溫度分辨率高達(dá)0.0625°C.默認(rèn)分辨率為0.25°C / LSB的顯示器（10位）。以上溫度范圍內(nèi)的典型精度為：±2°，全溫測量范圍為20°～125°，±1°±40°±125°，±0.5°C，±75°C。

在stts2004溫度傳感器工作在電源電壓從2.2 V至3.6 V 3.3 V操作在指定的，典型的電源電流為160μ一（包括I2C通信流）

車載Sigma-Delta ADC轉(zhuǎn)換為數(shù)字值，測得的溫度校準(zhǔn)°C.為華氏應(yīng)用，查找表或轉(zhuǎn)換程序是必需的。是的stts2004工廠校準(zhǔn)，不需要外部元件來測量溫度。

數(shù)字溫度傳感器組件具有用戶可編程寄存器DIMM的溫度傳感應(yīng)用提供能力。當(dāng)監(jiān)測溫度超過了可編程限制時(shí)，該開漏事件輸出引腳是活動(dòng)的，或是在報(bào)警窗口上方或下方。用戶可以選擇將事件輸出設(shè)置為一個(gè)臨界溫度輸出。該引腳可以配置為在一個(gè)比較器模式操作或在溫控器操作或中斷模式。

是的stts2004在stts2002 2 Kbit SPD兼容的協(xié)議，使用頁面選擇方法并應(yīng)用于上下頁4 Kbit SPD。不同的stts2002，stts2004不支持永久設(shè)置寫保護(hù)（pswp）特征。

鎖定一個(gè)128字節(jié)的塊EEPROM是通過使用一個(gè)軟件寫在高輸入電壓vhvon A0輸入引腳連接的保護(hù)機(jī)制。一個(gè)特定的I2C序列是用來保護(hù)每一塊寫直到寫保護(hù)電反復(fù)使用一個(gè)單獨(dú)的I2C時(shí)序這也需要vhvon A0引腳的輸入裝置。

所有四塊寫保護(hù)同時(shí)清除，并寫保護(hù)，可重新斷言后被清除。

Key Features

• 2.2 V memory module temperature sensor with integrated 4 Kb SPD EEPROM

• Fully compliant with JEDEC TSE2004B2 specifications

• Operating temperature range: –20 °C to +125 °C

• Single supply voltage 2.2 V to 3.6 V

• 2 mm x 3 mm TDFN8, height: 0.80 mm (max): JEDEC MO-229, W2030D compliant and RoHS compliant, halogen-free

• Temperature sensor

• Temperature sensor resolution: programmable (9-12 bits) 0.25 °C (typ)/LSB - (10-bit) default

• Temperature sensor accuracy (max) of: ± 1 °C (from +75 °C to +95 °C); ± 2 °C (from +40 °C to +125 °C); ± 3 °C (from –20 °C to +125 °C)

• ADC conversion time: 125 ms (max) / 70 ms (typ) at default resolution (10-bit)

• Typical operating supply current 160 μA (EEPROM standby)

• Temperature hysteresis selectable set points from 0, 1.5, 3, 6.0 °C

• 4 Kb SPD EEPROM

• Functionality identical to ST’s M34E04 SPD EEPROM

• 4 Kbits organized as two pages of 256 bytes each

• Each page is composed of two 128-byte blocks

• Software data protection for each 128-byte block

• Byte Write within 5 ms

• 16 bytes Page Write within 5 ms

• More than 1 million write cycles

• More than 40-year data retention

• Two-wire bus

• Two-wire I²C compatible serial interface

• Supports up to 1 MHz transfer rate (I²C Fast Mode+)

• Does not initiate clock stretching

• Supports SMBus timeout 25 ms - 35 ms

主要特點(diǎn)

2.2 V內(nèi)存模塊溫度傳感器集成4 KB的SPD EEPROM

完全符合JEDEC tse2004b2規(guī)格

工作溫度范圍：- 20°為±125°

單電源電壓2.2伏至3.6伏

2毫米x 3毫米tdfn8，高度：0.80毫米（最大）：JEDEC mo-229，w2030d符合RoHS、無鹵

溫度傳感器

溫度傳感器分辨率：可編程（9-12位）0.25°C（典型值）/ LSB -（10位）的默認(rèn)

溫度傳感器精度（最大值）為：±1°（±75°±95°）；±2°C（±40°±125°）；±3°C（由- 20°為±125°）

ADC轉(zhuǎn)換時(shí)間：125毫秒（max）/ 70毫秒（典型值）在默認(rèn)的分辨率（10位）

典型的電源電流160 A（EEPROMμ備用

溫度滯后選擇設(shè)定點(diǎn)從0，1.5，3，6°C

4 KB的SPD EEPROM

ST的m34e04 SPD EEPROM功能相同

4比特分為兩頁256字節(jié)

每一頁由2個(gè)128個(gè)字節(jié)組成

每個(gè)128字節(jié)塊的軟件數(shù)據(jù)保護(hù)

字節(jié)寫在5毫秒

5字節(jié)頁寫在16毫秒

超過100萬寫周期

超過40年的數(shù)據(jù)保留

雙線總線

兩線I2C兼容的串行接口

支持高達(dá)1 MHz的傳輸速率（I2C快速模式+）

不啟動(dòng)時(shí)鐘拉伸

支持SMBus超時(shí)25毫秒35毫秒