Overview The Cypress Envirosystems Wireless Pneumatic Thermostat (WPT) retrofits an existing pneumatic thermostat to provide Direct Digital Control (DDC) like zone control functionality at a fraction of the time and cost without disturbing occupants. The WPT enables remote monitoring of zone temperature, branch pressure, remote control of setpoints, and programmable setback or setup of the pneumatic HVAC systems. It also enables integration with utility Demand Response programs. The WPT USB Hub

The embedded nonvolatile elements incorporate QuantumTrap™ technology producing the world’s most reliable nonvolatile memory. The SRAM provides unlimited read and write cycles, while independent, nonvolatile data resides in the highly reliable QuantumTrap cell. Data transfers from the SRAM to the nonvolatile elements (the STORE operation) takes place automatically at power down. On power up, data is restored to the SRAM (the RECALL operation) from the nonvolatile memory. Both the STORE and RECAL

Pin Definition Figure 1. CY24713, 8-Pin SOIC Name Number Description XIN 1 Reference Crystal Input VDD 2 3.3V Voltage Supply VCXO 3 Input Analog Control for VCXO VSS 4 Ground CLK_B 5 13.5-MHz Clock Output CLK_A 6 4.9152-MHz Clock Output CLK_C 7 27-MHz Clock Output XOUT[1] 8 Reference Crystal Output Note 1. Float XOUT if XIN is externally driven. Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Document #: 38-07396 Rev. *A Revised May 22, 2008 [+] Fe

Device Comparison ¦ Meets Rambus® Extended Data Rate (XDR™) clocking requirements ¦ 25 ps typical cycle-to-cycle jitter . –135 dBc/Hz typical phase noise at 20 MHz offset ¦ 100 or 133 MHz differential clock input CY24271 CY24272 SDA hold time = 300 ns (SMBus compliant) SDA hold time = 0 ns (I2C compliant) RRC = 200. typical (Rambus standard drive) RRC = 295. minimum (Reduced output drive) ¦ 300–667 MHz high speed clock support ¦ Quad (open drain) differential output drivers ¦ Supports frequency

Notes 9. Jitter measured at crossing points and is the absolute value of the worst case deviation. 10. Measured at crossing points. 11. If input modulation is used; input modulation is allowed but not required. 12. The amount of allowed spreading for any non-triangular modulation is determined by the induced downstream tracking skew that cannot exceed the skew generated by the specified 0.6% triangular modulation. Typically, the amount of allowed non-triangular modulation is about 0.5%. 13. VOX

. BiCMOS technology Functional Description The CYV15G0404RB Independent Clock Quad HOTLink II™ Deserializing Reclocker is a point-to-point or point-to-multipoint communications building block enabling data transfer over a variety of high speed serial links including SMPTE 292 and SMPTE 259 video applications. It supports signaling rates in the range of 195 to 1500 Mbps for each serial link. The four channels are independent and can simultaneously operate at different rates. Each receive channel

BiCMOS technology Functional Description The CYV15G0104TRB Independent Clock HOTLink II™ Serializer and Reclocking Deserializer is a point-to-point or point-to-multipoint communications building block enabling transfer of data over a variety of high-speed serial links including SMPTE 292M and SMPTE 259M video applications. It supports signaling rates in the range of 195 to 1500 Mbps per serial link. The transmit and receive channels are independent and can operate simultaneously at different rat

Absolute Maximum Ratings this circuit. For proper operation, VIN and VOUT should be constrained to the range, VSS < (VIN or VOUT) < VDD. All digital inputs are tied high or low internally. Refers to electrical specifications for operating supply range. Parameter Description Min. Max. Unit VDD Operating Voltage 3.0 6.0 VDC VIRvss Input, relative to VSS –0.3 VDD + 0.3 VDC VORvss Output, relative to VSS –0.3 VDD + 0.3 VDC TOP Temperature, Operating 0 +70 °C TST Temperature, Storage –65 +150 °C TJ T

*F Page 4 of 12 [+] Feedback FS781/82/84 Table 4. Modulation Rate Divider Ratios S1 S0 Input Frequency Range (MHz) Modulation Divider Number 0 0 6 to 16 120 0 1 16 to 32 240 1 0 32 to 66 480 1 1 66 to 82 720 SSCG Modulation Profile The digital control inputs S0 and S1 determine the modulation frequency of FS781/2/4 products. The input frequency is divided by a fixed number, depending on the operating range that is selected. The modulation frequency of the FS78x can be determined from Table 4. To

outputs • 6- to 82-MHz operating frequency range • Modulates external clocks including crystals, crystal oscillators, or ceramic resonators • Programmable modulation with simple R-C external loop filter (LF) • Center spread modulation • 3V-5V power supply • TTL-/CMOS-compatible outputs • Low short-term jitter • Low-power Dissipation — 3.3 VDC = 37 mW – typical — 5.0 VDC = 115 mW – typical • Available in 8-pin SOIC and TSSOP packages Applications • Desktop/notebook computers • Printers, copiers,