3. Exceeding the absolute maximum ratings may damage the device.
4. The device is not guaranteed to function outside its operating ratings.
5. Due to the limited drive capability, use for input of the same package only.
6. Junction-to-board resistance assumes exposed pad is soldered (or equivalent) to the device’s most negative potential on the PCB.
7. Specification for packaged product only. The circuit is designed to meet the DC specifications shown in the DC Electrical Characteristics table after
thermal equilibrium has been established.
8. Due to the internal termination (see Input Buffer Structure), the input current depends on the applied voltages at IN, /IN, and V
T
inputs. Do not apply
a combination of voltages that causes the input current to exceed the maximum limit. Performance might be impacted if the differential inputs are
driven single-ended.
9. See Timing Diagram for V
T
definition. V
IN
(maximum) is specified when V
T
is floating.
10. See Typical Operating Characteristics section for V
DIFF
definition.
11. Operating using V
IN
is limited to AC-coupled PECL or CML applications only. Connect directly to the VT pin.
Parameter
Power supply
Power supply current
Differential input resistance
(IN-to-/IN)
Input high voltage (IN, /IN)
Input low voltage (IN, /IN)
Input voltage swing
Differential input voltage swing
Input current (IN, /IN)
Reference voltage
Condition
No load, maximum V
CC
Min.
2.375
Typ.
50
Max.
3.63
75
110
V
CC
+ 0.3
V
IH
−
0.1
V
CC
45
Units
V
mA
Ω
V
V
V
V
mA
V
90
Note
8
Note
8
Notes
8, 9
Notes
8, 9, 10
Note
8
Note
11
V
CC
−
1.525
0.1
−0.3
0.1
0.2
100
V
CC
−
1.425
V
CC
−
1.325
October 1, 2013
4
Revision 1.1
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY89874U
LVPECL (100KEP) DC Electrical Characteristics
(12,
13)
V
CC
= 3.3V
±
10% or 2.5V
±
5%; T
A
= -40
°
C to +85
°
C, R
L
= 50
Ω
to V
CC
- 2V, unless otherwise stated.
Symbol
V
OH
V
OL
V
OUT
V
DIFF_OUT
Parameter
Output HIGH voltage
Output LOW voltage
Output voltage swing
Differential output voltage swing
Condition
Min.
V
CC
– 1.145
V
CC
– 1.945
550
1.10
Typ.
V
CC
– 1.020
V
CC
– 1.820
800
1.60
Max.
V
CC
– 0.895
V
CC
– 1.695
1050
2.10
Units
V
V
mV
V
LVTTL/CMOS DC Electrical Characteristics
(13,
14)
V
CC
= 3.3V
±
10% or 2.5V
±
5%; T
A
= -40
°
C to +85
°
C, unless otherwise stated.
Symbol
V
IH
V
IL
I
IH
I
IL
Parameter
Input HIGH voltage
Input LOW voltage
Input HIGH current
Input LOW current
-125
Condition
Min.
2.0
0.8
20
-300
Typ.
Max.
Units
V
V
µA
µA
AC Electrical Characteristics
(13,
15)
V
CC
= 3.3V
±
10% or 2.5V
±
5%; T
A
= -40
°
C to +85
°
C, R
L
= 50
Ω
to V
CC
- 2V, unless otherwise stated.
Symbol
f
MAX
Parameter
Maxiumum output toggle
frequency
Maximum input frequency
t
PD
t
SKEW
Differential propagation delay
IN to Q
Within-device skew (differential)
Q0 – Q1
Part-to-part skew (differential)
t
RR
t
JITTER
t
r
/t
f
Notes:
12. The circuit is designed to meet the DC specifications shown in the LVPECL (100KEP) Electrical Characteristics table after thermal equilibrium has
been established.
13. Specification for packaged product only.
14. The circuit is designed to meet the DC specifications shown in the LVTTL/CMOS Electrical Characteristics table after thermal equilibrium has been
established.
15. Measured with 400mV signal, 50% duty cycle, all outputs loaded with 50Ω to V
CC
−
2V, unless otherwise stated.
16. Skew is measured between outputs under identical transitions.
17. See the Timing Diagram section.
18. Cycle-to-cycle jitter definition: The variation in period between adjacent cycles over a random sample of adjacent cycle pairs. T
JITTER_CC
= T
n
−
T
n+1
,
where T is the time between rising edges of the output signal.
19. Total jitter definition: With an ideal clock input, of frequency
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stm32/stm8
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