3
LTC1520
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tPLH, tPHL
Input-to-Output Propagation Delay
CL = 15pF (Figure 1)
q
15
18
21
ns
tr, tf
Rise/Fall Times
CL = 15pF
2.5
ns
tSKD
tPLH – tPHL Skew
CL = 15pF, Same Receiver (Note 5)
q
500
ps
tZL
Enable to Output Low
CL = 15pF (Figure 2)
q
10
35
ns
tZH
Enable to Output High
CL = 15pF (Figure 2)
q
10
35
ns
tLZ
Disable from Output Low
CL = 15pF (Figure 2)
q
20
35
ns
tHZ
Disable from Output High
CL = 15pF (Figure 2)
q
20
35
ns
tCH-CH
Channel-to-Channel Skew
CL = 15pF (Figure 3) (Note 6)
q
400
ps
tPKG-PKG
Package-to-Package Skew
CL = 15pF, Same Temperature
1.5
ns
(Figure 4, Note 4)
Minimum Input Pulse Width
(Note 4)
12
ns
fIN
Maximum Input Frequency
(Note 4)
40
MHz
VDD = 5V ±5% (Notes 2, 3) VID = 500mV, VCM = 2.5V, unless otherwise noted.
SWITCHI G TI E CHARACTERISTICS
UW
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the
safety of the device cannot be guaranteed. Recommended: VDD = 5V ±5%.
Note 2: All currents into the device pins are positive; all currents out of the
device pins are negative.
Note 3: All typicals are given for VDD = 5V, TA = 25°C.
Note 4: Guaranteed by design, but not tested.
Note 5: Worst-case
tPLH – tPHLskew for a single receiver in a package
over the full operating temperature range.
Note 6: Maximum difference between any two tPLH or tPHL transitions in a
single package over the full operating temperature range.
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Propagation Delay (tPLH/tPHL)
vs Temperature
TEMPERATURE (
°C)
–50
–25
0
PROPAGATION
DELAY
(ns)
10
25
0
50
75
LTC1520 G01
5
20
15
25
100
125
VCM = 2.5V
VID = 500mV
Propagation Delay (tPLH/tPHL)
vs Input Overdrive
INPUT OVERDRIVE (V)
0.05
0
PROPAGATION
DELAY
(ns)
15
20
25
0.1
1
5
10
1520 G02
10
5
TA = 25°C
VCM = 2.5V
Propagation Delay (tPLH/tPHL)
vs Input Common Mode
INPUT COMMON MODE (V)
0
PROPAGATION
DELAY
(ns)
15
2
4
5
LTC1520 G03
10
5
13
20
25
TA = 25°C
VID = 500mV