HDMP-1032 Avago Technologies US Inc., HDMP-1032 Datasheet - Page 27

• Manufacturer Part Number: HDMP-1032
• Manufacturer: Avago Technologies US Inc.

Specifications of HDMP-1032

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.15V
• Operating Supply Voltage (max): 3.45V
• Operating Temp Range: 0C to 150C
• Operating Temperature Classification: Commercial
• Package Type: PQFP
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

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connected directly into a high-
speed 50
mum performance, both outputs
should see the same impedance.
It is necessary that all HS_OUT
outputs be terminated into 50 .
Figure 15 shows various methods
of interfacing HS_OUT to HS_IN
and standard PECL logic.
Figure 13. O-TTL and I-TTL Simplified Circuit Schematic.
Figure 14. HS_OUT and HS_IN Simplified Circuit Schematic.
V
CC
GND
O_TTL
oscilloscope. For opti-
HS_OUT
PROTECTION
GND
V
CC
ESD
PROTECTION
ESD
V
GND_TTL
CC
_TTL
ZO = 50
Data Bus Line/Broadcast
Transmission
The GND_HS pins are normally
tied to ground to provide 50
put impedance. For 1:N broadcast
applications, 18K
can be inserted between GND_HS
and -5V to provide
an effective high impedance as
shown in Figure 16. A Port-
Bypass Circuit (PBC) can also be
PROTECTION
GND_HS
ESD
0.1 µF
0.1 µF
PROTECTION
series resistors
ESD
I_TTL
GND
50
in-
V
used in a broadcast application as
shown in Figure 17. Each
input and output PBC is a dedi-
cated channel and impedance
matched to the transmission
line. This is a superior method of
achieving a broadcast mode com-
pared to Figure 16, but does add
an additional IC. More receivers
can be added by cascading PBC
ICs or using a PBC with more ports.
CC
50
HS_IN
1.4 V
GND
V
CC