Datasheet

MAX9157
Quad Bus LVDS Transceiver
_______________________________________________________________________________________ 5
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.0V to 3.6V, R
L
= 27Ω ±1%, differential input voltage |V
ID
| = 0.2V to V
CC
, input frequency to LVDS inputs = 85MHz, input fre-
quency to LVCMOS/LVTTL inputs = 100MHz, LVCMOS/LVTTL inputs = 0 to 3V with 2ns (10% to 90%) transition times. Differential input
voltage transition time = 1ns (20% to 80%). Input common-mode voltage V
CM
= 1.2V to 1.8V, DE_ = high, RE_ = low, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at V
CC
= 3.3V, |V
ID
| = 0.2V, V
CM
= 1.2V, and T
A
= +25°C.) (Notes 3 and 5)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Fall Time t
THL
DE_ = low, Figures 7, 8; C
L
= 15pF 0.7 1.2 1.8 ns
MAX9157EGJ 6.74 8
Disable Time High to Z t
PHZ
DE_ = low, R
L
= 500Ω, C
L
= 15pF, Figures 9, 10
MAX9157EHJ 6.82 8
ns
MAX9157EGJ 6.49 8
Disable Time Low to Z t
PLZ
DE_ = low, R
L
= 500Ω, C
L
= 15pF, Figures 9, 10
MAX9157EHJ 6.79 8
ns
MAX9157EGJ 4.67 7
Enable Time Z to High t
PZH
DE_ = low, R
L
= 500Ω, C
L
= 15pF, Figures 9, 10
MAX9157EHJ 4.57 7
ns
MAX9157EGJ 5.43 7
Enable Time Z to Low t
PZL
DE_ = low, R
L
= 500Ω, C
L
= 15pF, Figures 9, 10
MAX9157EHJ 4.71 7
ns
Maximum Operating Frequency
(Note 10)
f
MAX
DE_ = low, C
L
= 15pF 85 MHz
Note 1: Current into a pin is defined as positive. Current out of a pin is defined as negative. All voltages are referenced to ground
except V
TH
, V
TL
, V
ID
, V
HYST
, V
OD
, and ∆V
OD
.
Note 2: Maximum and minimum limits over temperature are guaranteed by design and characterization. Devices are production
tested at T
A
= +25°C.
Note 3: Guaranteed by design and characterization.
Note 4: Short only one output at a time. Do not exceed the absolute maximum junction temperature specification.
Note 5: C
L
includes scope probe and test jig capacitance.
Note 6: t
SKD1
is the magnitude difference of differential propagation delays in a channel. t
SKD1
= | t
PHLD
- t
PLHD
|.
Note 7: t
CCSK
is the magnitude difference of the t
PLHD
or t
PHLD
of one channel and the t
PLHD
or t
PHLD
of any other channel on the
same part.
Note 8: t
SKD2
is the magnitude difference of any differential propagation delays between parts operating over rated conditions at
the same V
CC
and within 5°C of each other.
Note 9: t
SKD3
is the magnitude difference of any differential propagation delays between parts operating over rated conditions.
Note 10: Meets data sheet specifications while operating at minimum f
MAX
rating.
Typical Operating Characteristics
(V
CC
= 3.3V, R
L
= 27Ω, driver C
L
= 10pF, receiver C
L
= 15pF, |V
ID
| = 200mV, V
CM
= 1.2V, f
IN
= 20MHz, T
A
= +25°C, unless otherwise noted.)
75
85
80
95
90
100
105
0.01 1000
SUPPLY CURRENT vs. FREQUENCY
MAX9157 toc01
FREQUENCY (MHz)
SUPPLY CURRENT (mA)
10.1 10 100
FOUR CHANNELS
DRIVEN
V
CC
= 3.6V
V
CC
= 3.3V
V
CC
= 3.0V
0.400
0.401
0.403
0.402
0.404
0.405
3.0 3.23.1 3.3 3.4 3.5 3.6
DIFFERENTIAL OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX9157 toc02
SUPPLY VOLTAGE (V)
DIFFERENTIAL OUTPUT VOLTAGE (V)
0
0.6
0.4
0.2
0.8
1.0
1.2
1.4
1.6
1.8
2.0
15 45 75 105 135
DIFFERENTIAL OUTPUT VOLTAGE
vs. OUTPUT LOAD
MAX9157 toc03
OUTPUT LOAD (Ω)
DIFFERENTIAL OUTPUT VOLTAGE (V)