Datasheet
Diff input
LE
Q output
t
PD LE
t
h LE
t
s LE
t
PDHL
Differential
Input Signal
Differential
Output Signal
PW
t
PDH
Output Q
10% or 20%
80% or 90%
80% or 90%
10% or 20%
't
PDd
= | t
PDHd
- t
PDLd
|
t
PDd
= (t
PDHd
+ t
PDLd
)/ 2
t
fd
t
rd
t
r
t
f
0
V
O
V
O
0
t
PDHd
t
PDLd
t
PDL
't
PDLH
't
PDHL
V
overdrive
Output
Q
t
PDL
t
PDH
t
PD
= (t
PDLH
+ t
PDHL
)/ 2
't
PDQ
= | t
PDH
- t
PDL
|
't
PD
= 't
PDLH
+ 't
PDHL
)/ 2
t
PDHL
= (t
PDL
+ t
PDH
)/ 2
t
PDLH
= (t
PDH
+ t
PDL
)/ 2
't
PDQ
= | t
PDL
- t
PDH
|
't
PDLH
= | t
PDH
- t
PDL
|
't
PDHL
= | t
PDL
- t
PDH
|
LMH7322
SNOSAU8I –MARCH 2007–REVISED MARCH 2013
www.ti.com
Table 1. Definitions (continued)
Symbol Text Description
t
h
LE Latch Hold Time Time the input signal has to remain stable after enabling the latch functionality.
t
PD-LE
Latch to Output Delay Time Delay time between the moment the latch input crosses the switching level H to L
and the moment the differential output signal crosses the 50% level.
Note: input signal is opposite to output signal when latch becomes enabled.
Figure 19. Timing Definitions
Figure 20. LE Timing
Table 2. PIN DESCRIPTIONS
Pin Name Description Comment
1. VCCOA Positive Supply Output Stage part A The supply pin for the output stage is independent of the supply pin for
the input pin. This allows output levels of different logic families.
2. LEA Latch Enable Input part A Logic ‘1’ sets the part on hold. Logic levels are RSPECL (Reduced
Swing PECL) compatible.
3. LEA Latch Enable Input Not part A Logic ‘0’ sets the part on hold. Logic levels are RSPECL compatible.
4. VEEA Negative Supply part A The supply pin for the negative supply is connected to the VEEB via a
string of two anti-parallel diodes (see Figure 17)
5. VCCIA Positive Supply for Input Stage part A The supply pin for the input stage is independent of the supply for the
output stage.
6. RHYSA Hysteresis Resistor part A The hysteresis voltage is determined by connecting a resistor from this
pin to RHREFA.
7. INA- Negative Input part A Input for analog voltages between 200 mV below VEEA and 2V below
VCCIA.
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