Datasheet
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MAX9257A/MAX9258A
Fully Programmable Serializer/Deserializer
with UART/I
2
C Control Channel
MAX9258A AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC_
= +3.0V to +3.6V, V
CCIO
= +1.71V to +3.6V, R
L
= 50I Q1%, C
L
= 8pF, differential input voltage |V
ID
| = 0.1V to 1.2V, input
common-mode voltage V
CM
= |V
ID
/2| to V
CC
- |VID/2|, T
A
= -40NC to +105NC, unless otherwise noted. Typical values are at V
CC_
=
+3.3V, |V
ID
| = 0.2V, V
CM
= 1.2V, T
A
= +25NC) (Notes 5, 6 and 7)
Note 2: 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
and V
TL
.
Note 3: Maximum and minimum limits over temperature are guaranteed by design and characterization. Devices are production
tested at T
A
= +105NC.
Note 4: One output at a time.
Note 5: AC parameters are guaranteed by design and characterization, and are not production tested.
Note 6: C
L
includes probe and test jig capacitance.
Note 7: t
T
is the period of the PCLK_OUT.
Note 8: For high-speed mode timing, see the Detailed Description section.
Note 9: I
2
C timing parameters are specified for fast-mode I
2
C. Max data rate = 400kbps.
Typical Operating Characteristics
(V
CC_
= +3.3V, R
L
= 50O, C
L
= 8pF, T
A
= +25NC, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Data Valid Before PCLK_ OUT t
DVB
(Figure 11) 0.35 x t
T
ns
Data Valid After PCLK_OUT t
DVA
(Figure 11) 0.35 x t
T
ns
Serial-to-Parallel Delay
t
SPD1
Spread off (Figure 14) 8t
T
ns
t
SPD2
Q4% spread
40t
T
Power-Up Delay t
PUD
(Figure 12) 100 ns
Power-Down to High Impedance t
PDD
(Figure 13) 100 ns
Jitter Tolerance t
JT
Each half of the UI, 12 bit,
SRATE = 840Mbps, PRBS
pattern (Figure 15)
No spread 0.25 0.30 UI
MAX9257A SUPPLY CURRENT
vs. FREQUENCY
MAX9257A/58A toc01
PCLK FREQUENCY (MHz)
SUPPLY CURRENT (mA)
20 4025 3515 3010
20
40
60
80
100
120
0
5 45
PRBS PATTERN
18-BIT
100% PREEMPHASIS
NO PREEMPHASIS
MAX9257A SUPPLY CURRENT
vs. FREQUENCY
MAX9257A/58A toc02
PCLK FREQUENCY (MHz)
SUPPLY CURRENT (mA)
5515 45
60
40
20
80
100
120
140
0
5 7535 6525
PRBS PATTERN
10-BIT
100% PREEMPHASIS
NO PREEMPHASIS
MAX9258A SUPPLY CURRENT
vs. FREQUENCY
MAX9257A/58A toc03
PCLK FREQUENCY (MHz)
SUPPLY CURRENT (mA)
4010 3515
40
20
60
80
100
120
0
5 452520 30
PRBS PATTERN
18-BIT
4% SPREAD
NO SPREAD