5
Motorola
ECL AC CHARACTERISTICS
(V
EE
=V
EEmin
to V
EEmax
, V
CC
=V
CCO
=GND)
Symbol
Characteristics
-40 deg C
0 deg C
25 deg C
85 deg C
Unit
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
t
PD
Propagation Delay
CLK
N
to Q
XX
(differential)
a
CLK
N
to Q
XX
(single-ended)
b
MR to Q
XX
Pin-to-Pin Skew
c
Part-to-Part Skew
d
Minimum Input Swing
e
Common Mode Range
f
Output Rise/Fall Time
g
a. The differential propagation delay is defined as the delay from the crossing points of the differential input signal to the crossing point of the
differential output signal
b. The single ended propagation delay is defined as the delay from the 50% point of the input signal to the 50% point of the output signal
c. The pin-to-pin skew is defined as the worst case difference in propagation delay between any two similar delay path within a single device
d. Output-to-output skew is defined as the worst case difference in propagation delay between any output of any device operating under the
same conditions
e. V
PPmin
is defined as the minimum input differential voltage which will cause no increase of the propagation delay.
VPP
min
is AC limited. A differential input signal of 50 mV will still produce full ECL levels at the output.
f.
V
CMR
is defined as the range within the VIH level may vary, with the device still meeting the propagatio delay specification. The VIL level
must be such that the peak-to-peak voltage is less than 1.0 V and greater or equal to VPPmin.
g. 20%-80%
900
900
1000
900
900
1000
900
900
1000
900
900
1000
ps
t
SK(O)
t
SK(PP)
V
PP
V
CMR
t
r
, t
f
50
150
50
150
50
150
50
150
ps
400
400
400
400
mV
V
200
200
200
200
ps
PECL AC CHARACTERISTICS
(V
EE
=GND, V
CC
=V
CCO
=V
CCmin
to V
CCmax
)
Symbol
Characteristics
-40 deg C
0 deg C
25 deg C
85 deg C
Unit
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
t
PD
Propagation Delay
CLK
N
to Q
XX
(differential)
a
CLK
N
to Q
XX
(single-ended)
b
MR to Q
XX
Pin-to-Pin Skew
c
Part-to-Part Skew
Minimum Input Swing
d
Common Mode Range
e
Output Rise/Fall Time
f
a. The differential propagation delay is defined as the delay from the crossing points of the differential input signal to the crossing point of the
differential output signal
b. The single ended propagation delay is defined as the delay from the 50% point of the input signal to the 50% point of the output signal
c. The pin-to-pin skew is defined as the worst case difference between any two similar delay path within a single device
d. VPPmin is defined as the minimum input differential voltage which will cause no increase of the propagation delay. VPPmin is AC limited. A
differential input signal of 50 mV will still produce full ECL levels at the output.
e. V
CMR
is defined as the range within the VIH level may vary, with the device still meeting the propagation delay specification. The VIL level
must be such that the peak-to-peak voltage is less than 1.0 V and greater or equal to VPPmin.
f.
20%-80%
900
900
1000
900
900
1000
900
900
1000
900
900
1000
ps
t
sk(o)
t
sk(pp)
V
PP
V
CMR
t
r
/t
f
50
150
50
150
50
150
50
150
ps
400
400
400
400
mV
V
200
200
200
200
ps