CY7C68000A MoBL-USB™ TX2 USB 2.0 UTMI Transceiver MoBL-USB™ TX2 Features • UTMI-compliant/USB 2.0 certified for device operation • Operates in both USB 2.0 high-speed (HS), 480 Mbits/second, and full-speed (FS), 12 Mbits/second • Optimized for seamless interface with Intel® Monahans Applications Processors • Tri-state Mode allows sharing of UTMI bus with other devices • Serial-to-parallel and parallel-to-serial conversions • 8-bit unidirectional, 8-bit bidirectional, or 16-bit bidirectional external data interface • Synchronous field and EOP detection on receive packets • Synchronous field and EOP generation on transmit packets • Data and clock recovery from the USB serial stream • Bit stuffing/unstuffing; bit stuff error detection • Staging register to manage data rate variation due to bit stuffing/unstuffing • 16-bit 30 MHz and 8-bit 60 MHz parallel interface • Ability to switch between FS and HS terminations and signaling • Supports detection of USB reset, suspend, and resume • Supports HS identification and detection as defined by the USB 2.0 Specification • • • • Supports transmission of resume signaling 3.3V operation Two package options: 56-pin QFN and 56-pin VFBGA All required terminations, including 1.5 Kohm pull up on DPLUS, are internal to chip • Supports USB 2.0 test modes The Cypress MoBL-USB™ TX2 is a Universal Serial Bus (USB) specification revision 2.0 transceiver, serial/deserializer, to a parallel interface of either 16 bits at 30 MHz or eight bits at 60 MHz. The MoBL-USB TX2 provides a high-speed physical layer interface that operates at the maximum allowable USB 2.0 bandwidth. This allows the system designer to keep the complex high-speed analog USB components external to the digital ASIC which decreases development time and associated risk. A standard interface is provided that is USB 2.0 certified and is compliant with Transceiver Macrocell Interface (UTMI) specification version 1.05 dated 3/29/2001. This product is also optimized to seamlessly interface with Monahans -P & -L applications processors. It has been characterized by Intel and is recommended as the USB 2.0 UTMI transceiver of choice for its Monahans processors. It is also capable of tri-stating the UTMI bus while suspended to allow the bus to be shared with other devices. Two packages are defined for the family: 56-pin QFN and 56-pin VFBGA. The functional block diagram is shown below. Block Diagram Tri_state Cypress Semiconductor Corporation Document #: 38-08052 Rev. *F • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised November 16, 2006 CY7C68000A Applications Mobile Applications • Smart Phones • PDA Phones • Gaming Phones • MP3 players • Portable Media Players (PMP) • GPS Tracking Devices Consumer Applications • Cameras • Scanners • DSL Modems • Memory Card Readers interface pins to be shared with other devices. This is valuable in mobile handset applications, where GPIO’s are at a premium. The outputs and IO’s will be tri-stated ~50ns following Tri-state Mode being enabled, and will be driven ~50ns following Tri-state Mode being disabled. All inputs must not be left floating while in Tri-state Mode. When resuming after a suspend, the PLL stabilizes approximately 200 µs after the suspend pin goes high. Reset Pin An input pin (Reset) resets the chip. This pin has hysteresis and is active HIGH according to the UTMI specification. The internal PLL stabilizes approximately 200 µs after VCC has reached 3.3 volts. Line State Functional Overview The Line State output pins LineState[1:0] are driven by combinational logic and may be toggling between the ‘J’ and the ‘K’ states. They are synchronized to the CLK signal for a valid signal. On the CLK edge the state of these lines reflect the state of the USB data lines. Upon the clock edge the ‘0’ bit of the LineState pins is the state of the DPLUS line and the ‘1’ bit of LineState is the DMINUS line. When synchronized, the setup and hold timing of the LineState is identical to the parallel data bus. The functionality of this chip is described in the sections below. Full-speed vs. High-speed Select USB Signaling Speed The MoBL-USB TX2 does not support the low-speed (LS) signaling rate of 1.5 Mbps. The FS vs. HS is done through the use of both XcvrSelect and the TermSelect input signals. The TermSelect signal enables the 1.5 Kohm pull up on to the DPLUS pin. When TermSelect is driven LOW, a SE0 is asserted on the USB providing the HS termination and generating the HS Idle state on the bus. The XcvrSelect signal is the control that selects either the FS transceivers or the HS transceivers. By setting this pin to a’0’ the HS transceivers are selected and by setting this bit to a’1’ the FS transceivers are selected. Transceiver Clock Frequency Operational Modes The MoBL-USB TX2 has an on-chip oscillator circuit that uses an external 24 MHz (±100-ppm) crystal with the following characteristics: • Parallel resonant • Fundamental mode • 500 µW drive level • 27–33 pF (5% tolerance) load capacitors The operational modes are controlled by the OpMode signals. The OpMode signals are capable of inhibiting normal operation of the transceiver and evoking special test modes. These modes take effect immediately and take precedence over any pending data operations. The transmission data rate when in OpMode depends on the state of the XcvrSelect input. Non-Consumer Applications • Networking • Wireless LAN • Home PNA The MoBL-USB TX2 operates at two of the rates defined in the USB Specification 2.0, dated April 27, 2000. • Full speed, with a signaling bit rate of 12 Mbps • High speed, with a signaling bit rate of 480 Mbps An on-chip phase-locked loop (PLL) multiplies the 24 MHz oscillator up to 30/60 MHz, as required by the transceiver parallel data bus. The default UTMI interface clock (CLK) frequency is determined by the DataBus16_8 pin. Buses The two packages allow for a 8- or 16-bit bidirectional data bus for data transfers to a controlling unit. Suspend and Tri-state Modes When the MoBL-USB TX2 is not in use, the processor can reduce power consumption by putting it into Suspend mode using the Suspend pin. While in Suspend mode, Tri-state mode may be enabled, which tri-states all outputs and IO’s, allowing the UTMI Document #: 38-08052 Rev. *F OpMode[1:0] Mode Description 00 0 Normal operation 01 1 Non-driving 10 2 Disable Bit Stuffing and NRZI encoding 11 3 Reserved Mode 0 allows the transceiver to operate with normal USB data decoding and encoding. Mode 1 allows the transceiver logic to support a soft disconnect feature that tri-states both the HS and FS transmitters, and removes any termination from the USB, making it appear to an upstream port that the device has been disconnected from the bus. Page 2 of 14 CY7C68000A Mode 2 disables Bit Stuff and NRZI encoding logic so ‘1’s loaded from the data bus becomes ‘J’s on the DPLUS/DMINUS lines and ‘0’s become ‘K’s. DPLUS/DMINUS Impedance Termination on the DPLUS line. These resistors are incorporated into the part. They are factory trimmed to meet the requirements of USB 2.0. Incorporating these resistors also reduces the pin count on the part. The CY7C68000A does not require external resistors for USB data line impedance termination or an external pull up resistor Pin Assignments The following pages illustrate the individual pin diagrams that are available in the 56-pin QFN and 56-pin VFBGA packages. The packages offered use either an 8-bit (60 MHz) or 16-bit (30 MHz) bus interface. Figure 1. CY7C68000A 56-pin QFN Pin Assignment 56-pin QFN ValidH VCC TXValid GND Uni_bidi DataBus16_8 CLK D0 D1 Reserved D2 VCC D3 D4 56 55 54 53 52 51 50 49 48 47 46 45 44 43 TXReady 1 42 GND Suspend 2 41 D5 Reset 3 40 Reserved AVCC 4 39 D6 XTALOUT 5 38 D7 XTALIN 6 37 D8 36 D9 CY7C68000A AGND 7 AVCC 8 35 Reserved DPLUS 9 34 D10 DMINUS 10 33 D11 AGND 11 32 VCC XcvrSelect 12 31 D12 TermSelect 13 30 GND OpMode0 14 29 D13 56-pin QFN 15 16 17 18 19 20 21 22 23 24 25 26 27 28 OpMode1 GND VCC LineState0 LineState1 GND RXValid RXActive RXError Tri_state Reserved D15 D14 VCC Document #: 38-08052 Rev. *F Page 3 of 14 CY7C68000A Figure 2. CY7C68000A 56-pin VFBGA Pin Assignment 1 2 3 4 5 6 7 8 A 1A 2A 3A 4A 5A 6A 7A 8A B 1B 2B 3B 4B 5B 6B 7B 8B C 1C 2C 3C 4C 5C 6C 7C 8C D 1D 2D 7D 8D E 1E 2E 7E 8E F 1F 2F 3F 4F 5F 6F 7F 8F G 1G 2G 3G 4G 5G 6G 7G 8G H 1H 2H 3H 4H 5H 6H 7H 8H CY7C68000A Pin Descriptions Table 1. Pin Descriptions[1] QFN VFBGA Name Type Default Description 4 H1 AVCC Power N/A Analog VCC This signal provides power to the analog section of the chip. 8 H5 AVCC Power N/A Analog VCC This signal provides power to the analog section of the chip. 7 H4 AGND Power N/A Analog Ground Connect to ground with as short a path as possible. 11 H8 AGND Power N/A Analog Ground Connect to ground with as short a path as possible. 9 H6 DPLUS I/O/Z Z USB DPLUS Signal Connect to the USB DPLUS signal. 10 H7 DMINUS I/O/Z Z USB DMINUS Signal Connect to the USB DMINUS signal. Note 1. Unused inputs should not be left floating. Tie either HIGH or LOW as appropriate. Outputs that are three-statable should only be pulled up or down to ensure signals at power-up and in standby. Document #: 38-08052 Rev. *F Page 4 of 14 CY7C68000A Table 1. Pin Descriptions[1] (continued) QFN VFBGA Name Type 49 G8 D0 I/O 48 G7 D1 I/O 46 G5 D2 I/O 44 G3 D3 I/O 43 G2 D4 I/O 41 F8 D5 I/O 39 F6 D6 I/O 38 F5 D7 I/O 37 F4 D8 I/O 36 F3 D9 I/O 34 F1 D10 I/O 33 G4 D11 I/O Default Description Bidirectional Data Bus This bidirectional bus is used as the entire data bus in the 8-bit bidirectional mode or the least significant eight bits in the 16-bit mode. Under the 8-bit unidirectional mode, these bits are used as inputs for data, selected by the RxValid signal. Bidirectional Data Bus This bidirectional bus is used as the upper eight bits of the data bus when in the 16-bit mode, and not used when in the 8bit bidirectional mode. Under the 8-bit unidirectional mode these bits are used as outputs for data, selected by the TxValid signal. 31 E1 D12 I/O 29 D8 D13 I/O 27 G1 D14 I/O 26 E2 D15 I/O 50 A1 CLK Output 3 B2 Reset Input N/A Active HIGH Reset Resets the entire chip. This pin can be tied to VCC through a 0.1-µF capacitor and to GND through a 100 K resistor for a 10-ms RC time constant. 12 B3 XcvrSelect Input N/A Transceiver Select This signal selects between the Full-Speed (FS) and the High-Speed (HS) transceivers: 0: HS transceiver enabled 1: FS transceiver enabled 13 B4 TermSelect Input N/A Termination Select This signal selects between the between the Full Speed (FS) and the High Speed (HS) terminations: 0: HS termination 1: FS termination 2 B1 Suspend Input N/A Suspend Places the CY7C68000A in a mode that draws minimal power from supplies. Shuts down all blocks not necessary for Suspend/Resume operations. While suspended, TermSelect must always be in FS mode to ensure that the 1.5 Kohm pull up on DPLUS remains powered. 0: CY7C68000A circuitry drawing suspend current 1: CY7C68000A circuitry drawing normal current 24 B8 Tri_state Input Tri-state Mode Enable Places the CY7C68000A into Tri-state mode which tri-states all outputs and IO’s. Tri-state Mode can only be enabled while suspended. 0: Disables Tri-state Mode 1: Enables Tri-state Mode 19 C2 LineState1 Output Line State These signals reflect the current state of the single-ended receivers. They are combinatorial until a “usable” CLK is available then they are synchronized to CLK. They directly reflect the current state of the DPLUS (LineState0) and DMINUS (LineState1). D– D+ Description 0 0 0: SE0 0 1 1: ‘J’ State 1 0 2: ‘K’ State 1 1 3: SE1 Document #: 38-08052 Rev. *F Clock This output is used for clocking the receive and transmit parallel data on the D[15:0] bus. Page 5 of 14 CY7C68000A Table 1. Pin Descriptions[1] (continued) QFN VFBGA Name Type Default Description 18 C1 LineState0 Output 15 B6 OpMode1 Input Operational Mode These signals select among various operational modes. 10 Description 00–0: Normal Operation 01–1: Non-driving 10–2: Disable Bit Stuffing and NRZI encoding 11–3: Reserved 14 B5 OpMode0 Input Operational Mode These signals select among various operational modes. 10 Description 00–0: Normal Operation 01–1: Non-driving 10–2: Disable Bit Stuffing and NRZI encoding 11–3: Reserved 54 A5 TXValid Input Transmit Valid This signal indicates that the data bus is valid. The assertion of Transmit Valid initiates SYNC on the USB. The negation of Transmit Valid initiates EOP on the USB. The start of SYNC must be initiated on the USB no less than one or no more that two CLKs after the assertion of TXValid. In HS (XcvrSelect = 0) mode, the SYNC pattern must be asserted on the USB between 8- and 16-bit times after the assertion of TXValid is detected by the Transmit State Machine. In FS (Xcvr = 1), the SYNC pattern must be asserted on the USB no less than one or more than two CLKs after the assertion of TXValid is detected by the Transmit State Machine. 1 A8 TXReady Output Transmit Data Ready If TXValid is asserted, the SIE must always have data available for clocking in to the TX Holding Register on the rising edge of CLK. If TXValid is TRUE and TXReady is asserted at the rising edge of CLK, the CY7C68000A will load the data on the data bus into the TX Holding Register on the next rising edge of CLK. At that time, the SIE should immediately present the data for the next transfer on the data bus. 21 A4 RXValid Output Receive Data Valid This signal indicates that the DataOut bus has valid data. The Receive Data Holding Register is full and ready to be unloaded. The SIE is expected to latch the DataOut bus on the clock edge. 22 B7 RXActive Output Receive Active This signal indicates that the receive state machine has detected SYNC and is active. RXActive is negated after a bit stuff error or an EOP is detected. 23 A6 RXError Output Receive Error 0 Indicates no error. 1 Indicates that a receive error has been detected. Document #: 38-08052 Rev. *F Line State These signals reflect the current state of the single-ended receivers. They are combinatorial until a ‘usable’ CLK is available then they are synchronized to CLK. They directly reflect the current state of the DPLUS (LineState0) and DMINUS (LineState1). D– D+ Description 00–0: SE0 01–1: ‘J’ State 10–2: ‘K’ State 11–3: SE1 Page 6 of 14 CY7C68000A Table 1. Pin Descriptions[1] (continued) QFN VFBGA Name 56 A7 ValidH 51 A2 6 Type Default Description I/O ValidH This signal indicates that the high-order eight bits of a 16-bit data word presented on the Data bus are valid. When DataBus16_8 = 1 and TXValid = 0, ValidH is an output, indicating that the high-order receive data byte on the Data bus is valid. When DataBus16_8 = 1 and TXValid = 1, ValidH is an input and indicates that the high-order transmit data byte, presented on the Data bus by the transceiver, is valid. When DataBus16_8 = 0, ValidH is undefined. The status of the receive loworder data byte is determined by RXValid and are present on D0–D7. DataBus16_8 Input Data Bus 16_8 This signal selects between 8- and 16-bit data transfers. 1–16-bit data path operation enabled. CLK = 30 MHz. 0–8-bit data path operation enabled. When Uni_Bidi = 0, D[8:15] are undefined. When Uni_Bidi =1, D[0:7] are valid on TxValid and D[8:15] are valid on RxValid. CLK = 60 MHz Note: DataBus16_8 is static after Power-on Reset (POR) and is only sampled at the end of Reset. H3 XTALIN Input N/A Crystal Input Connect this signal to a 24 MHz parallel-resonant, fundamental mode crystal and 20 pF capacitor to GND. It is also correct to drive XTALIN with an external 24 MHz square wave derived from another clock source. 5 H2 XTALOUT Output N/A Crystal Output Connect this signal to a 24 MHz parallel-resonant, fundamental mode crystal and 30 pF (nominal) capacitor to GND. If an external clock is used to drive XTALIN, leave this pin open. 52 A3 Uni_Bidi Input Driving this pin HIGH enables the unidirectional mode when the 8bit interface is selected. Uni_Bidi is static after power-on reset (POR). 55 C6 VCC Power 17 C7 VCC Power N/A VCC. Connect to 3.3V power source. VCC. Connect to 3.3V power source. 28 D7 VCC Power N/A VCC. Connect to 3.3V power source. 32 E7 VCC Power N/A VCC. Connect to 3.3V power source. 45 E8 VCC Power N/A VCC. Connect to 3.3V power source. 53 C4 GND Ground N/A Ground. 16 C5 GND Ground N/A Ground. 20 C3 GND Ground N/A Ground. 30 D1 GND Ground N/A Ground. 42 D2 GND Ground N/A Ground. 47 G6 Reserved INPUT Connect pin to Ground. 40 F7 Reserved INPUT Connect pin to Ground. 35 F2 Reserved INPUT Connect pin to Ground. 25 C8 Reserved INPUT Connect pin to Ground. Document #: 38-08052 Rev. *F Page 7 of 14 CY7C68000A Absolute Maximum Ratings Operating Conditions Storage Temperature ................................. –65°C to +150°C TA (Ambient Temperature Under Bias) ............ 0°C to +70°C Ambient Temperature with Power Supplied ..... 0°C to +70°C Supply Voltage ...............................................+3.0V to +3.6V Supply Voltage to Ground Potential .............. –0.5V to +4.0V Ground Voltage ................................................................. 0V DC Input Voltage to Any Input Pin ............................. 5.25 V FOSC (Oscillator or Crystal Frequency) ... 24 MHz ± 100 ppm ................................................................... Parallel Resonant DC Voltage Applied to Outputs in High-Z State ..................................... –0.5V to VCC + 0.5V Power Dissipation ....................................................630 mW Static Discharge Voltage ..........................................> 2000V Max Output Current, per IO pin .................................... 4 mA Max Output Current, all 21–IO pins ............................84 mA DC Characteristics Table 2. DC Characteristics Parameter Description VCC Supply Voltage VIH Input High Voltage VIL Input Low Voltage Conditions Min. Typ. Max. Unit 3.0 3.3 3.6 V 2 5.25 V –0.5 0.8 V ±10 µA II Input Leakage Current 0< VIN < VCC VOH Output Voltage High IOUT = 4 mA VOL Output Low Voltage IOUT = –4 mA IOH Output Current High IOL Output Current Low CIN Input Pin Capacitance Except DPLUS/DMINUS/CLK DPLUS/DMINUS/CLK 15 pF CLOAD Maximum Output Capacitance Output pins 30 pF ISUSP Suspend Current Connected[2] 2.4 Disconnected[2] V 0.4 V 4 mA 4 mA 10 pF 228 273 µA 8 35 µA ICC Supply Current HS Mode Normal operation OPMOD[1:0] = 00 175 mA ICC Supply Current FS Mode Normal operation OPMOD[1:0] = 00 90 mA tRESET Minimum Reset time 1.9 ms USB 2.0 Transceiver USB 2.0-compliant in FS and HS modes. Note 2. Connected to the USB includes 1.5 Kohm internal pull up. Disconnected has the 1.5 Kohm internal pull up excluded. Document #: 38-08052 Rev. *F Page 8 of 14 CY7C68000A AC Electrical Characteristics USB 2.0 Transceiver USB 2.0 certified in FS and HS. Timing Diagram HS/FS Interface Timing–60 MHz Figure 3. 60-MHz Interface Timing Constraints CLK TCSU_MIN TCH_MIN Control_In TDH_MIN TDSU_MIN DataIn TCCO Control_Out TCDO DataOut Table 3. 60-MHz Interface Timing Constraints Parameters Parameter Description Min. Typ. Max. Unit TCSU_MIN Minimum set-up time for TXValid 4 ns TCH_MIN Minimum hold time for TXValid 1 ns TDSU_MIN Minimum set-up time for Data (transmit direction) 4 ns TDH_MIN Minimum hold time for Data (transmit direction) 1 TCCO Clock to Control out time for TXReady, RXValid, RXActive and RXError 1 8 ns TCDO Clock to Data out time (Receive direction) 1 8 ns Document #: 38-08052 Rev. *F Notes ns Page 9 of 14 CY7C68000A HS/FS Interface Timing–30 MHz Figure 4. 30-MHz Timing Interface Timing Constraints CLK TCSU_MIN TCH_MIN Control_In TDH_MIN TDSU_MIN DataIn TCDO TCCO TCVO Control_Out TVH_MIN TVSU_MIN DataOut Table 4. 30 MHz Timing Interface Timing Constraints Parameters Parameter Description Min. Typ. Max. Unit TCSU_MIN Minimum set-up time for TXValid 16 ns TCH_MIN Minimum hold time for TXValid 1 ns TDSU_MIN Minimum set-up time for Data (Transmit direction) 16 ns TDH_MIN Minimum hold time for Data (Transmit direction) 1 ns TCCO Clock to Control Out time for TXReady, RXValid, RXActive and RXError 1 20 TCDO Clock to Data out time (Receive direction) 1 20 TVSU_MIN Minimum set-up time for ValidH (transmit Direction) 16 TVH_MIN Minimum hold time for ValidH (Transmit direction) 1 TCVO Clock to ValidH out time (Receive direction) 1 Notes ns ns ns ns 20 ns Figure 5. Tri-state Mode Timing Constraints Ttspd Ttssu Ttspd Suspend Tri-state Output / IO XXXX Hi-Z Table 5. Tri-state Mode Timing Constraints Parameters Parameter Description Ttssu Minimum set-up time for Tri-state Ttspd Propagation Delay for Tri-State mode Document #: 38-08052 Rev. *F Min. Typ. Max. Unit 50 ns 0 Notes ns Page 10 of 14 CY7C68000A Ordering Information Table 6. Ordering Information Ordering Code Package Type CY7C68000A-56LFXC 56 QFN CY7C68000A-56BAXC 56 VFBGA CY3683 MoBL-USB TX2 Development Board Package Diagrams The MoBL-USB TX2 is available in two packages: • 56-pin QFN • 56-pin VFBGA Figure 6. 56-Lead Quad Flatpack No Lead Package 8 x 8 mm (Sawn Version) LS56B DIMENSIONS IN MM[INCHES] MIN. MAX. REFERENCE JEDEC MO-220 TOP VIEW BOTTOM VIEW SIDE VIEW 0.08[0.003] 7.90[0.311] C 1.00[0.039] MAX. 8.10[0.319] 0.20[0.008] REF. PIN #1 CORNER PIN #1 0.18[0.007] 0.28[0.011] CORNER E-PAD 8.10[0.319] 7.90[0.311] 0.04[0.0015] MAX. 6.45[0.254] 6.55[0.258] A (PAD SIZE VARY BY DEVICE TYPE) 0.30[0.012] 0.50[0.020] C 0.50[0.020] SEATING PLANE 6.45[0.254] 6.55[0.258] 51-85187-*A Document #: 38-08052 Rev. *F Page 11 of 14 CY7C68000A Package Diagrams (continued) Figure 7. 56 VFBGA (5 x 5 x 1.0 mm) 0.50 Pitch, 0.30 Ball BZ56 TOP VIEW BOTTOM VIEW Ø0.05 M C Ø0.15 M C A B PIN A1 CORNER A1 CORNER Ø0.30±0.05(56X) 8 7 6 5 4 3 2 1 A B C D E F G H 0.50 3.50 A B C D E F G H 5.00±0.10 5.00±0.10 1 2 3 4 5 6 6 8 0.50 -B3.50 -A- 5.00±0.10 5.00±0.10 0.080 C 0.45 SIDE VIEW 0.10 C 0.10(4X) REFERENCE JEDEC: MO-195C PACKAGE WEIGHT: 0.02 grams 0.160 ~0.260 1.0 max SEATING PLANE 0.21 -C- PCB Layout Recommendations[3] The following recommendations must be followed to ensure reliable high-performance operation. • At least a four-layer impedance controlled board is required to maintain signal quality • Specify impedance targets (ask your board vendor what they can achieve) • To control impedance, maintain trace widths and trace spacing to within written specifications • Minimize stubs to minimize reflected signals • Connections between the USB connector shell and signal ground must be done near the USB connector • Bypass/flyback capacitors on VBus, near the connector, are recommended 001-03901-*B • DPLUS and DMINUS trace lengths must be kept to within 2 mm of each other in length, with preferred length of 20–30 mm • Maintain a solid ground plane under the DPLUS and DMINUS traces. Do not allow the plane to be split under these traces • It is best to have no vias placed on the DPLUS or DMINUS trace routing • Isolate the DPLUS and DMINUS traces from all other signal traces by no less than 10 mm Quad Flat Package No Leads (QFN) Package Design Notes Electrical contact of the part to the Printed Circuit Board (PCB) is made by soldering the leads on the bottom surface of the Note 3. Source for recommendations: EZ-USB FX2™ PCB Design Recommendations, http:///www.cypress.com/cfuploads/support/app_notes/FX2_PCB.pdf HighSpeed USB Platform Design Guidelines, http://www.usb.org/developers/docs/hs_usb_pdg_r1_0.pdf. Document #: 38-08052 Rev. *F Page 12 of 14 CY7C68000A MicroLeadFrame (MLF) Technology.” The application note can be downloaded from AMKOR’s web site from the following URL http://www.amkor.com/products/notes_papers/MLFApp Note.pdf. The application note provides detailed information on board mounting guidelines, soldering flow, rework process, etc. package to the PCB. Hence, special attention is required to the heat transfer area below the package to provide a good thermal bond to the circuit board. A Copper (Cu) fill is to be designed into the PCB as a thermal pad under the package. Heat is transferred from the MoBL-USB TX2 through the device’s metal paddle on the bottom side of the package. Heat from here, is conducted to the PCB at the thermal pad. It is then conducted from the thermal pad to the PCB inner ground plane by an array of via. A via is a plated through hole in the PCB with a finished diameter of 13 mil. The QFN’s metal die paddle must be soldered to the PCB’s thermal pad. Solder mask is placed on the board top side over each via to resist solder flow into the via. The mask on the top side also minimizes outgassing during the solder reflow process. Figure 8 displays a cross-sectional area underneath the package. The cross section is of only one via. The solder paste template needs to be designed to allow at least 50% solder coverage. The thickness of the solder paste template should be 5 mil. It is recommended that ‘No Clean’, type 3 solder paste be used for mounting the part. Nitrogen purge is recommended during reflow. Figure 9 is a plot of the solder mask pattern image of the assembly (darker areas indicate solder). For further information on this package design, refer to the application note “Surface Mount Assembly of AMKOR’s Figure 8. Crosssection of the Area Underneath the QFN Package 0.017” dia Solder Mask Cu Fill Cu Fill PCB Material Via hole for thermally connecting the QFN to the circuit board ground plane. 0.013” dia PCB Material This figure only shows the top three layers of the circuit board: Top Solder, PCB Dielectric, and the Ground Plane Figure 9. Plot of the Solder Mask (White Area) MoBL-USB TX2 is a trademark of Cypress Semiconductor Corporation. Intel is a registered trademark of Intel Corporation. All product and company names mentioned in this document are the trademarks of their respective holders. Document #: 38-08052 Rev. *F Page 13 of 14 © Cypress Semiconductor Corporation, 2006. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. CY7C68000A Document History Page Document Title: CY7C68000A MoBL-USB™ TX2 USB 2.0 UTMI Transceiver Document Number: 38-08052 REV. ECN NO. Issue Date Orig. of Change Description of Change ** 285592 See ECN KKU New data sheet *A 427959 See ECN TEH Addition of VFBGA Package information and Pinout, Removal of SSOP Package. Edited text and moved figure titles to the top per new template *B 470121 See ECN TEH Change from preliminary to final data sheet. Grammatical and formatting changes *C 476107 See ECN TEH This data sheet needs to be posted to the web site under NDA *D 491668 See ECN TEH Addition of Tri-state Mode *E 498415 See ECN TEH Update power consumption numbers *F 567869 See ECN TEH Remove NDA requirement Document #: 38-08052 Rev. *F Page 14 of 14