Stub Series Terminated Logic
- Stub Series Terminated Logic
Stub Series Terminated Logic (SSTL) devices are a family of electronic devices for driving transmission lines. They are specifically designed for driving the DDR (double-data-rate) SDRAM modules used in computer memory. However, they are also used in other applications, notably, some PCI Express PHYs and other high-speed devices.
Three voltage levels for SSTL are defined:
*SSTL_3, 3.3 V, defined in EIA/JESD8-8 1996
*SSTL_2, 2.5 V, defined in EIA/JESD8-9B 2002
*SSTL_18, 1.8 V, defined in EIA/JESD8-15
All SSTL voltage specs reference a voltage that is exactly VDDQ/2. For example, the VREF for an SSTL_18 signal is exactly 0.9 Volts.
Terminations can be:
*Class I (one series resistor at the source and one parallel resistor at the load)
*Class II (one series resistor at the source and two parallel resistors, one at each end).
*Class III (asymmetrically parallel terminated)
*Class IIII (asymmetrically doubly parallel terminated)
ee also
*High-Speed Transceiver Logic - HSTL
External links
* [http://www.jedec.org/download/search/jesd8-9b.pdf JEDEC SSTL_2 Standard]
* [http://www.jedec.org/download/search/JESD8-15a.pdf JEDEC SSTL_18 Standard]
Wikimedia Foundation.
2010.
Look at other dictionaries:
High-speed transceiver logic — or HSTL is a technology independent standard for signalling between integrated circuits. The nominal signalling range is 0 V to 1.5 V, though variations are allowed, and signals may be single ended or differential. It is designed for operation… … Wikipedia
Input/output standards — This is a list of electrical input/output standards that have moreor less well defined electrical properties like operating voltage, drivingcurrent, level switching behavior, circuit implementation etc., or are (industry) standards.Different… … Wikipedia
DDR3 SDRAM — This article is about DDR3 SDRAM. For graphics DDR3, see GDDR3. In computing, DDR3 SDRAM, an abbreviation for double data rate type three synchronous dynamic random access memory, is a modern kind of dynamic random access memory (DRAM) with a… … Wikipedia
SSTL — The four letter abbreviation SSTL may refer to:*Site Specific Target Level a target used in the remediation of contaminated land *Surrey Satellite Technology Ltd a company which builds and operates small satellites *Stub Series Terminated Logic a … Wikipedia
SSTL — steht für: Stub Series Terminated Logic, eine elektrische Definition bei Bussystemen Surrey Satellite Technology, eine Firma für Satellitentechnik Diese Seite ist eine Begriffsklärung zur Unterscheidung mehrerer mit demselben Wort bezeichneter… … Deutsch Wikipedia
literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… … Universalium