HDMP-0450 Datasheet, PDF (4/10 Pages) Agilent(Hewlett-Packard) – Quad Port Bypass Circuit for Fibre Channel Arbitrated Loops

I/O Type Definitions
I/O Type
I-LVTTL
O-LVTTL
HS_OUT
HS_IN
C
S
Definition
LVTTL Input
LVTTL Output
High Speed Output. LVPECL Compatible
High Speed Input
External Circuit Note
Power Supply or Ground
Pin Definitions
Pin Name
Pin Pin Type Pin Description
TO_NODE[0]+ 24 HS_OUT Serial Data Outputs: High-speed outputs to a hard disk drive or to a cable.
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
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.
BYPASS[0]–
BYPASS[1]–
BYPASS[2]–
BYPASS[3]–
BYPASS[4]–
14 I-LVTTL Bypass Inputs: For “disk bypassed” mode, connect BYPASS[n]– to GND through
15
a 1 kΩ resistor. For “disk in loop” mode, float HIGH.
16
17
18
SD
20 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 = undefined
If 100 mV >= (FM_NODE[0]+ – FM_NODE[0]–), SD = 0
4