Cypress Semiconductor CYS25G0101DX-ATC Instrukcja Użytkownika Pobierz pdf (Strona 11)

CYS25G0101DX

Document Number: 38-02009 Rev. *K Page 11 of 17

AC Specifications

Table 6. AC Specifications—Parallel Interface

Parameter Description Min Max Unit

TXCLKI Frequency (must be frequency coherent to REFCLK) 154.5 156.5 MHz

TXCLKI

TXCLKI Period 6.38 6.47 ns

TXCLKID

TXCLKI Duty Cycle 40 60 %

TXCLKIR

TXCLKi Rise Time 0.3 1.5 ns

TXCLKIF

TXCLKi Fall Time 0.3 1.5 ns

TXDS

Write Data Setup to ↑ of TXCLKI 1.5 ns

TXDH

Write Data Hold from ↑ of TXCLKI 0.5 ns

TOS

TXCLKO Frequency 154.5 156.5 MHz

TXCLKO

TXCLKO Period 6.38 6.47 ns

TXCLKOD

TXCLKO Duty Cycle 43 57 %

TXCLKOR

TXCLKO Rise Time 0.3 1.5 ns

TXCLKOF

TXCLKO Fall Time 0.3 1.5 ns

RXCLK Frequency 154.5 156.5 MHz

RXCLK

RXCLK Period 6.38 6.47 ns

RXCLKD

RXCLK Duty Cycle 43 57 %

RXCLKR

RXCLK Rise Time

[6]

0.3 1.5 ns

RXCLKF

RXCLK Fall Time

[6]

0.3 1.5 ns

RXDS

Recovered Data Setup with reference to ↑ of RXCLK 2.2 ns

RXDH

Recovered Data Hold with reference to ↑

of RXCLK 2.2 ns

RXPD

Valid Propagation Delay –1.0 1.0 ns

Table 7. AC Specifications—REFCLK

The AC Specifications—REFCLK follow.

[7]

Parameter Description Min Max Unit

REF

REFCLK Input Frequency 154.5 156.5 MHz

REFP

REFCLK Period 6.38 6.47 ns

REFD

REFCLK Duty Cycle 35 65 %

REFT

REFCLK Frequency Tolerance — (relative to received serial data)

[8]

–100 +100 ppm

REFR

REFCLK Rise Time 0.3 1.5 ns

REFF

REFCLK Fall Time 0.3 1.5 ns

Table 8. AC Specifications–CML Serial Outputs

Parameter Description Min Typical Max Unit

RISE

CML Output Rise Time (20–80%, 100Ω balanced load) 60 170 ps

FALL

CML Output Fall Time (80–20%, 100Ω balanced load) 60 170 ps

Notes

6. RXCLk rise time and fall times are measured at the 20 to 80 percentile region of the rising and falling edge of the clock signal.

7. The 155.52 MHz Reference Clock Phase Noise Limits for the CYS25G0101DX are shown in Figure 6.

8. +20 ppm is required to meet the SONET output frequency specification.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17

SONET OC-48 Transceiver 1
CYS25G0101DX 10

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