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TQ9502MC

531/1063 Mbaud Fibre Channel Transmitter and Receiver

TriQuint Semiconductor 

TQ9501/TQ9502

Table 2. Transmitter Pin Descriptions

Symbol

TX, TY

TLX, TLY

LOOPEN

REFCLK

Type

O

O

I

I

BYTECLK

O

TXD0..9

I

TXCLK

I

SIG, SIGN

I

SIGDET

O

RATESEL

I

Description

Differential Transmitter Outputs connect to an optical transmitter, a coaxial interface or shielded twisted pair

interface. LOOPEN low selects TY and TX outputs. LOOPEN high drives TX low and TY high.

Loopback Differential Transmitter Outputs connect to the Receiver RLX and RLY inputs. LOOPEN high selects

TLY and TLX outputs. LOOPEN low drives TLX low and TLY high.

Loopback Enable high selects the TLX and TLY as outputs. LOOPEN low selects the TX and TY as outputs.

The PLL multiplies the Reference Clock and generates the high speed clock for transmitting serial data.

REFCLK shall be equal to 1/40 of the baud rate. REFCLK shall have a frequency tolerance of 100 ppm to

guarantee clock and data recovery on the receiver. The REFCLK operating range is 25 MHz to 31.25 MHz.

The ENDEC uses Byte Clock to synchronize to the Transmitter. The ENDEC generates TXCLK from BYTECLK

simplifying the synchronization between the Transmitter and ENDEC, as shown on Figure 7.

The Transmitter latches the 10 Encoded Data Bits at the rising edge of TXCLK. The Transmitter serially

sends TXD9 first and TXD0 last.

The Transmitter Data Clock strobes TXD0..9 into the Transmitter. The ENDEC generates TXCLK from BYTECLK

simplifying the synchronization between the Transmitter and ENDEC.

The Differential Signal Present are inputs to a PECL to TTL translator. The translator is typically used to

convert differential signals from a differential optical receiver output to TTL. The TTL equivalent of SIG and

SIGN is SIGDET.

Signal Detect is the output of the PECL to TTL translator. The translator is typically used to convert differential

signals from a differential optical receiver output to TTL. SIGDET is useful when implementing an OFC - Open

Fibre Control protocol where the link activity or optical receiver outputs are monitored continuously.

Rate Select is used to select between 531 Mbaud (RATESEL=VDD) and 1063 Mbaud (RATESEL=GND)

operation.

Figure 5. Fly-By ™ Termination Schematic

5V

82 Ω

Z0 = 50 Ω

5V

82 Ω

130 Ω

Z0 = 50 Ω

130 Ω

TQ9502 RX

RLTY

RLY

RLX

RLTX

5V

82 Ω

Z0 = 50 Ω

5V

82 Ω

130 Ω

Z0 = 50 Ω

130 Ω

RTY

RY

RX

RTX

Figure 6. Transmitter Synchronization Ciruit Block Diagram

TQ9303 ENDEC

TQ9501 TX

BTXD0..9

BTXCKOUT

BTXCKIN

TXD0..9

TXCLK

BYTECLK

6

For additional information and latest specifications, see our website: www.triquint.com

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