參數(shù)資料
型號(hào): HDMP-1636
英文描述: Software
中文描述: 千兆以太網(wǎng)收發(fā)器芯片
文件頁數(shù): 10/15頁
文件大?。?/td> 325K
代理商: HDMP-1636
720
I/O Type Definitions
I/O Type
I-TTL
O-TTL
HS_OUT
HS_IN
C
S
Definition
Input TTL, Floats High When Left Open
Output TTL
High Speed Output, ECL Compatible
High Speed Input
External Circuit Node
Power Supply or Ground
HDMP-1636/46 (TRx)
Pin Input Capacitance
Symbol
C
INPUT
Parameter
Units
pF
Typ.
1.6
Max.
Input Capacitance on TTL Input Pins
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
between 25-75
.
Figure 9. O-TTL and I-TTL Simplified Circuit Schematic.
V
CC
_TTL
R
V
BB
1.4 V
R
GND_TTL
V
CC
_TX
or
V
CC
_RX
ESD
PROTECTION
GND_TTL
V
CC
_TTL
R
R
R
O_TTL
I_TTL
GND
ESD
PROTECTION
V
CC
_TX
HS_OUT
R
0.01
0.01
Zo = 75
Zo = 75
V
CC
_TXHS
V
CC
_TXECL
GND
ESD
PROTECTION
-DOUT
+DOUT
150
150
R
PAD
R
PAD
GND_TXHS
+DIN
-DIN
ESD
PROTECTION
R
+
+
HS_IN
150
V
CC
_RX
GND
GND_RXHS
V
CC
_RXHS
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