HDMP-1637A Datasheet, PDF (8/16 Pages) Agilent(Hewlett-Packard) – Gigabit Ethernet SerDes Circuit with Differential PECL Clock Inputs

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
Parameter
t_r,REFCLK
+REFCLK/-REFCLK Rise Time, 20% to 80%
t_f,REFCLK
+REFCLK/-REFCLK Fall Time, 80% to 20%
t_r,TTLout
Output TTL Rise Time, 0.8 to 2.0 volts, 10pF Load
t_f,TTLout
Output TTL Fall Time, 2.0 to 0.8 volts, 10pF Load
t_{rs, HS_OUT} HS_OUT Single-Ended (+DOUT) Rise Time
t_{fs,HS_OUT}
HS_OUT Single-Ended (+DOUT) Fall Time
t_{rd, HS_OUT} HS_OUT Differential Rise Time
t_{fd,HS_OUT} HS_OUT Differential Fall Time
V_{IP,HS_IN}
HS_IN Input Peak-To-Peak Differential Voltage
V_{OP,HS_OUT[1]} HS_OUT Output Pk-Pk Diff. Voltage (Z0=50 Ohms, Fig.10)
Units
ns
ns
ns
ns
ps
ps
ps
ps
mV
mV
Note:
1. Output Peak-to-Peak Differential Voltage specified as DOUT+ minus DOUT-.
Min. Typ.
85
85
85
85
200
1200
0.8
0.5
1200
1600
Max.
0.6
0.6
2.4
2.4
327
327
327
327
2000
2200
X1
X2
120.0 ps/div
CURRENT
RISETIME (f2) ^< 1 ps
FALLTIME (f2) ^< 1 ps
130.3664 ns
Y
X
1 (f2) = –637.00 mV 130.549 ns
2 (f2) = 636.00 mV 131.349 ns
∆ = 1.27300 V 800 ps
1/∆X = 1.250 GHz
WAVEFORM MATH
f1 = 3 – 4
f2 = 1 – 2
FUNCTION
f1
f2
DEFINE
FUNCTION...
DISPLAY
off
on
VERTICAL SCALE
auto manual
Y SCALE
250 mV/div
Y OFFSET
0.0 V
Figure 7. Eye Diagram of a High Speed Differential Output.