HDMP-0452 查看數據表（PDF） - HP => Agilent Technologies

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HDMP-0452

Quad Port Bypass Circuit with CDR for Fibre Channel Arbitrated Loops

HP => Agilent Technologies 

Table 3. Pin Definitions for HDMP-0452.

Pin Name Pin Pin Type Pin Description

TO_NODE[0]+ 24

TO_NODE[0]– 25

TO_NODE[1]+ 07

TO_NODE[1]– 06

TO_NODE[2]+ 44

TO_NODE[2]– 43

TO_NODE[3]+ 38

TO_NODE[3]– 37

TO_NODE[4]+ 31

TO_NODE[4]– 30

HS_OUT Serial Data Outputs: High-speed outputs to a hard disk drive or to a cable input.

FM_NODE[0]+ 10

FM_NODE[0]– 09

FM_NODE[1]+ 04

FM_NODE[1]– 03

FM_NODE[2]+ 41

FM_NODE[2]– 40

FM_NODE[3]+ 35

FM_NODE[3]– 34

FM_NODE[4]+ 28

FM_NODE[4]– 27

HS_IN

Serial Data Inputs: High-speed inputs from a hard disk drive or from a cable output.

BYPASS[0]– 14 I-LVTTL Bypass Inputs: For “disk bypassed” mode, connect BYPASS[n]– to GND through

BYPASS[1]– 15

a 1 kΩ resistor. For “disk in loop” mode, float HIGH.

BYPASS[2]– 16

BYPASS[3]– 17

BYPASS[4]– 18

REFCLK

13 I-LVTTL Reference Clock: A user-supplied clock reference used for frequency acquisition in

the Clock and Data Recovery (CDR) circuit.

CPLL1

CPLL0

21 C

22

Loop Filter Capacitor: A loop filter capacitor for the internal Clock and Data Recovery

(CDR) circuit must be connected across the CPLL1 and CPLL0 pins. Recommended

value is 0.1 µF.

SD

19 O-LVTTL Signal Detect: Indicates acceptable signal amplitude on the FM_NODE[0]± inputs.

If (FM_NODE[0]+ – FM_NODE[0]–) >= 400 mV peak-to-peak, SD = 1

If 400 mV > (FM_NODE[0]+ – FM_NODE[0]–) > 100 mV, SD = unpredictable

If 100 mV >= (FM_NODE[0]+ – FM_NODE[0]–), SD = 0

GND

01 S

Ground: Normally 0 volts. See Figure 11 for Recommended Power Supply Filtering.

08

11

12

23

33

39

VCCA

32 S

Analog Power Supply: Normally 3.3 volts. Used to provide a clean supply line for the

Clock and Data Recovery (CDR) circuit. See Figure 11 for Recommended Power

Supply Filtering.

VCCHS[0]

VCCHS[1]

VCCHS[2]

VCCHS[3]

VCCHS[4]

26 S

05 S

42 S

36 S

29 S

High Speed Supply: Normally 3.3 volts. Used only for high-speed outputs

(TO_NODE[n]). See Figure 11 for Recommended Power Supply Filtering.

VCC

02 S

Logic Power Supply: Normally 3.3 volts. Used for internal logic.

20

See Figure 11 for Recommended Power Supply Filtering.

5

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