MAX9271GTJ/V+ Maxim Integrated, MAX9271GTJ/V+ Datasheet - Page 32

• Manufacturer Part Number: MAX9271GTJ/V+
• Description: Serializers & Deserializers - Serdes 1.5Gbps 16-bit Coax/STP serializer
• Manufacturer: Maxim Integrated
• Type: Serializerr

Specifications of MAX9271GTJ/V+

• Rohs: yes
• Data Rate: 1.5 Gbit/s
• Input Type: CMOS/LVCMOS
• Output Type: CML
• Number Of Inputs: 16
• Number Of Outputs: 1
• Operating Supply Voltage: 1.7 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: TQFN-32
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

Table 6. Serial Output Spread
Table 7. Spread Limitations
operation range guarantees a spread-spectrum modu-
lation frequency within 20kHz to 40kHz. Additionally,
manual configuration of the sawtooth divider (SDIV: 0x03,
D[5:0]) allows the user to set a modulation frequency
according to the PCLKIN frequency. When ranges are
manually selected, program the SDIV value for a fixed
modulation frequency around 20kHz.
The modulation rate relates to the PCLKIN frequency as
follows:
where:
f
DRS = DRS value (0 or 1)
f
MOD = Modulation coefficient given in
SDIV = 6-bit SDIV setting, manually programmed by the FC
To program the SDIV setting, first look up the modula-
tion coefficient according to the desired bus-width and
Maxim Integrated
M
PCLKIN
= Modulation frequency
BWS = 0 MODE, PCLKIN
= PCLKIN frequency
FREQUENCY (MHz)
66.6 to 100
(DBL = 0)
(DBL = 1)
33.3 to 50
(DBL = 0)
(DBL = 1)
< 33.3
< 66.6
000
001
010
011
100
101
110
111
f
SS
M
=
(1 DRS)
Manual Programming of the
+
Spread-Spectrum Divider
MOD x SDIV
f
PCLKIN
No spread spectrum. Power-up default.
±0.5% spread spectrum.
±1.5% spread spectrum.
±2% spread spectrum.
No spread spectrum.
±1% spread spectrum.
±3% spread spectrum.
±4% spread spectrum.
16-Bit GMSL Serializer with Coax or
Table 8
BWS = 1 MODE, PCLKIN
FREQUENCY (MHz)
(DBL = 0)
(DBL = 1)
25 to 37.5
(DBL = 0)
(DBL = 1)
50 to 75
< 25
< 50
spread-spectrum settings. Solve the above equation for
SDIV using the desired pixel clock and modulation fre-
quencies. If the calculated SDIV value is larger than the
maximum allowed SDIV value in
maximum value.
In default mode (additional error detection and correc-
tion disabled), data encoding/decoding is the same as in
previous GMSL serializers/deserializers (parity only). At
the serializer, the parallel input word is scrambled and a
parity bit is added. The scrambled word is divided into
3 or 4 bytes (depending on the BWS setting), 8b/10b
encoded, and then transmitted serially. At the deserial-
izer, the same operations are performed in reverse order.
The parity bit is used by the deserializer to find the word
boundary and for error detection. Errors are counted in
an error counter register and an error pin indicates errors.
The serializer can use one of two additional error-
detection/correction methods (selectable by register
setting):
1) 6-bit cyclic redundancy check
2) 6-bit hamming code with 16-word interleaving
Additional Error Detection and Correction
SPREAD (%)
SERIAL LINK BIT
RATE (Mbps)
< 1000
R 1000
STP Cable Drive
Table
MAX9271
All rates available
1.5%, 1.0%, 0.5%
SPREAD RATES
AVAILABLE
8, set SDIV to the
32