HDMP-3268 Datasheet, PDF (8/18 Pages) Agilent(Hewlett-Packard) – 3.2 Gbit/sec 68x68 Crosspoint Switch

should only be used if necessary.
When TERM is pulled high to
VDD all low speed digital inputs
and I/Os except TERM itself are
terminated. Pins affected are
WSTB, CH[6:0], CS, RW,
DATA[6:0], CNTL, USE and SET.
Since the transmission line is
terminated at both ends, the
driving impedance is 25 Ω.
HDMP-3268s connected in the
middle of the transmission line do
not need to be terminated. Figure
8 shows a typical connection.
CONTROLLER
VREF0
VREF1
0.1 µF
0.1 µF
HDMP-3268
VREF1
VREF0
0.1 µF
HDMP-3268
VREF1
VREF0
DATA I/O
25 Ω DRIVING
IMPEDANCE
INTERNALLY
TERMINATED
TO VREFI
THROUGH 50 Ω
50 Ω TRANSMISSION LINE
DATA I/O
25 Ω DRIVING
IMPEDANCE
TERM
50 Ω TRANSMISSION LINE
V_DD
DATA I/O
25 Ω DRIVING
IMPEDANCE
TERM
TERMINATED SSTL_2 CONNECTION
Figure 8. Terminated SSTL_2 connection.
Table 5. HDMP-3268 Absolute Maximum Ratings
T_A = 25°C, except as specified. Operation in excess of any one of these conditions may result in permanent damage to
the device.
Symbol
Parameter
Units
Min. Max.
VDD
Logic Supply Voltage
V
-0.5 3.6 V
VCC
Switch Array Power Supply
V
-0.5 3.6 V
VCC_DOUT High Speed Output Supply
V
-0.5 3.6 V
VIN
Input Voltage for WSTB, CH[6:0], CS, RW, DATA[6:0], CNTL
V
-0.5 VDD+1.25 V
VINHS
High Speed Input Voltage for DIN[0:67]+ and DIN[0:67]-
V
-0.5 VCC+0.5 V^[1]
Tj
Junction Temperature
o_C
0
+125
Tstg
Storage Temperature
o_C
-55 +125
ESD
ESD Rating (HBM)
kV
2
Note:
1. VIN must remain less than or equal to the absolute maximum supply voltage of 3.6 V.
Table 6. HDMP-3268 Recommended Operating Conditions
Symbol
Parameter
VDD
Logic Supply Voltage
VCC
Switch Array Power Supply
VCC_DOUT
High Speed Output Supply
Ta
Ambient Temperature
Tc
Case Temperature
Units
V
V
V
o_C
o_C
Min.
Typ.
2.35
2.5
2.35
2.5
2.35
2.5
0
25
Max.
2.65
2.65
2.65
85
8