8
HDMP-1637A (TRx)
PECL DC Electrical Specifications for REFCLK
T
A
= 0°C to +70°C, V
CC
= 3.15 V to 3.45 V
Symbol
Parameter
V
IH,PECL
PECL Input High Voltage Level
V
IL,PECL
PECL Input Low Voltage Level
Unit
V
V
Min.
2.14
1.49
Typ.
Max.
2.42
1.82
HDMP-1637A (TRx)
AC Electrical Specifications
T
A
= 0°C to +70°C, V
CC
= 3.15 V to 3.45 V
Symbol
t
r,REFCLK
t
f,REFCLK
t
r,TTLout
t
f,TTLout
t
rs, HS_OUT
t
fs,HS_OUT
t
rd, HS_OUT
t
fd,HS_OUT
V
IP,HS_IN
V
OP,HS_OUT[1]
Parameter
+REFCLK/-REFCLK Rise Time, 20% to 80%
+REFCLK/-REFCLK Fall Time, 80% to 20%
Output TTL Rise Time, 0.8 to 2.0 volts, 10pF Load
Output TTL Fall Time, 2.0 to 0.8 volts, 10pF Load
HS_OUT Single-Ended (+DOUT) Rise Time
HS_OUT Single-Ended (+DOUT) Fall Time
HS_OUT Differential Rise Time
HS_OUT Differential Fall Time
HS_IN Input Peak-To-Peak Differential Voltage
HS_OUT Output Pk-Pk Diff. Voltage (Z0=50 Ohms, Fig.10)
Units
ns
ns
ns
ns
ps
ps
ps
ps
mV
mV
Min.
Typ.
Max.
0.6
0.6
2.4
2.4
327
327
327
327
2000
2200
0.8
0.5
85
85
85
85
200
1200
1200
1600
Note:
1. Output Peak-to-Peak Differential Voltage specified as DOUT+ minus DOUT-.
X1
X2
WAVEFORM MATH
f1 = 3 – 4
f2 = 1 – 2
FUNCTION
f1
f2
DEFINE
FUNCTION...
DISPLAY
off
on
VERTICAL SCALE
auto
120.0 ps/div
CURRENT
RISETIME (f2) < 1 ps
FALLTIME (f2) < 1 ps
Y
1 (f2) = –637.00 mV
2 (f2) = 636.00 mV
∆
= 1.27300 V
1/∆X =
130.3664 ns
X
130.549 ns
131.349 ns
800 ps
1.250 GHz
250 mV/div
Y OFFSET
0.0 V
manual
Y SCALE
Figure 7. Eye Diagram of a High Speed Differential Output.
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
