4
ECL Pro™
SY10EPT28L
SY100EPT28L
Micrel, Inc.
M9999-111605
hbwhelp@micrel.com or (408) 955-1690
T
A
= –40°CT
A
= +25°CT
A
= +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
V
OH
Output HIGH Voltage 2.0 — — 2.0 — — 2.0 — — V I
OH
= –3mA
V
OL
Output LOW
Voltage — — 0.5 — — 0.5 — — 0.5 V I
OH
= –24mA
V
IH
Input HIGH Voltage 2.0 — — 2.0 — — 2.0 — — V
V
IL
Input LOW Voltage — — 0.8 — — 0.8 — — 0.8 V
V
IK
Input Clamp Voltage — — –1.2 — — –1.2 — — –1.2 V I
IK
= –18mA
I
IH
Input HIGH Current — — 20 — — 20 — — 20 µAV
IN
= 2.7V
— — 100 — — 100 — — 100 µAV
IN
= V
CC
I
IL
Input LOW Current — — –0.2 — — –0.2 — — –0.2 µAV
IN
= 0.5V
I
OUT(SC)
LVTTL Output –275 — –80 –275 — –80 –275 — –80 mA V
OUT
= 0V
Short-Circuit Current
C
IN
Input Capacitance (SOIC) — — — 0.75 — — — pF
(MSOP) — — — 1.1 — — — pF
LVTTL DC ELECTRICAL CHARACTERISTICS
(4)
V
CC
= 3.3V ±10%
T
A
= –40°CT
A
= +25°CT
A
= +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition
f
MAX
Maximum Frequency Output
LVPECL 700 — — 700 — — 700 — — MHz Toggle
LVTTL 275 350 — 275 350 — 275 350 — MHz Frequency
t
PLH
Propagation Delay
t
PHL
D_LVPECL ➝ Q_LVTTL 1.5 — 2.5 1.5 — 2.5 1.5 — 2.5 ns C
L
= 20pF
Q_LVTTL ➝ D_LVPECL 100 400 600 100 400 600 100 400 600 ps
50Ω to V
CC
–2.0
V
CMR
LVPECL 1.2 — V
CC
1.2 — V
CC
1.2 — V
CC
V
Common Mode Range
V
PP
LVPECL Input Voltage Swing
100 — — 100 — — 100 — — mV
Note 5
(Single-Ended)
LVPECL Output Rise/Fall Times
200 — 500 200 — 500 200 — 500 ns
50Ω to V
CC
–2.0
t
r
,
t
f
(20% to 80%)
LVTTL Output Rise/Fall Times 0.5 — 1.0 0.5 — 1.0 0.5 — 1.0 ns C
L
= 20pF
(10% to 90%)
t
DC
Duty Cycle 45 50 55 45 50 55 45 50 55 %
t
JITTER
Cycle-to-Cycle Jitter (rms) — 0.2 < 1 — 0.2 < 1 — 0.2 < 1 ps RMS
4. 10/100KEPT circuits are designed to meet the DC specifications shown in the above tables after thermal equilibrium has been established. The
circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained.
5. V
PP
(min) is the minimum input swing for which AC parameters are guaranteed.
AC ELECTRICAL CHARACTERISTICS
(4)
V
CC
= +3.3V ±10%
