hdmp-1636 Avago Technologies, hdmp-1636 Datasheet - Page 10

• Manufacturer Part Number: hdmp-1636
• Description: Gigabit Ethernet Transceiver Chip
• Manufacturer: Avago Technologies

I/O Type Definitions
HDMP-1636/46 (TRx)
Pin Input Capacitance
Figure 9. O-TTL and I-TTL Simplified Circuit Schematic.
Figure 10. HS_OUT and HS_IN Simplified Circuit Schematic.
Notes:
1. HS_IN inputs should never be connected to ground as permanent damage to the device may result.
2. The optional series padding resistors (Rpad) help dampen load reflections. Typical Rpad values for mismatched loads range
720
O_TTL
between 25-75
V
Symbol
CC
C
INPUT
_TTL
I/O Type
HS_OUT
R
O-TTL
HS_IN
I-TTL
GND_TTL
C
S
R
.
R
HS_OUT
Input Capacitance on TTL Input Pins
PROTECTION
PROTECTION
ESD
ESD
Input TTL, Floats High When Left Open
Output TTL
High Speed Output, ECL Compatible
High Speed Input
External Circuit Node
Power Supply or Ground
Parameter
+DOUT
-DOUT
V
V
GND
V
V
V
CC
CC
150
GND
CC
CC
CC
or
_RX
_TX
150
_TXHS
_TXECL
_TX
R
R
PROTECTION
PAD
PAD
GND_TXHS
ESD
Zo = 75
Zo = 75
GND_RXHS
Definition
V
CC
0.01
0.01
150
V
_RXHS
CC
R
GND_TTL
V
GND
CC
_RX
_TTL
+DIN
-DIN
Units
I_TTL
pF
R
PROTECTION
ESD
V
BB
1.4 V
HS_IN
Typ.
R
1.6
+
–
+
–
R
Max.