MAX9257AGCM+ Maxim Integrated, MAX9257AGCM+ Datasheet - Page 40

• Manufacturer Part Number: MAX9257AGCM+
• Description: Serializers & Deserializers - Serdes Prog Serializer / Deserializer
• Manufacturer: Maxim Integrated
• Type: Serializerr

Specifications of MAX9257AGCM+

• Rohs: yes
• Data Rate: 840 Mbit/s
• Input Type: LVCMOS
• Output Type: LVDS
• Number Of Inputs: 18
• Number Of Outputs: 1
• Operating Supply Voltage: 1.7 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-48
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 1.71 V, 3 V

The MAX9257A features a UART-to-I
converts UART packets to I
verter works as a repeater between the ECU and exter nal
I
and converts UART read/write packets from the ECU to
I
the UART-to-I
directly into I
follows the UART packet protocol. The I
period is approximately the same as the UART bit clock
period (tUCLK). The I
I
ETO timer. Choose ETO large enough so that I
commands are not lost due to ETO timing out.
Table 31. Timing Information for I
*t
Figure 30. I
2
2
2
SCL Clock Frequency
Start Condition Hold Time
Low Period of SCL Clock
High Period of SCL Clock
Repeated START Condition Setup Time
Data Hold Time
Data Setup Time
Setup Time for STOP Condition
Bus Free Time
SCL
UCLK
SDA
C slave devices. The MAX9257A acts as the master
C read/write for external I
C reads from the peripheral device do not disable the
is equal to one UART period.
P
2
C Timing Parameters
t
BUF
2
2
C. For reads, the UART-to-I
C converts the UART packets received
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S
PARAMETER
Fully Programmable Serializer/Deserializer
2
C speed varies with UART speed.
t
HD;STA
t
LOW
2
C slave devices. For writes,
2
C. The UART-to-I
t
HD;DAT
t
R
2
C converter that
2
C SCL clock
2
C converter
2
with UART/I
C Data Rates Greater than 400kbps
t
HIGH
2
2
C con-
C read
t
F
I
2
C
SYMBOL
t HD:DAT
t HD:STA
t SU:DAT
t SU:STO
t SU:STA
t HIGH
t LOW
f SCL
t BUF
t
SU;DAT
The MAX9257A acts like a master in I
with the peripheral device. The MAX9257A takes less
than 22 UART bit times to convert UART packets into I
The SCL and SDA timings are based on the UART bit
clock. The I
range from 95kbps to 4.25Mbps. The I
ments scale linearly from fast mode to higher speeds.
Table 31
greater than 400kbps. The I
t
UCLK
t
SU;STA
MAX9257A/MAX9258A
. See
shows the I
0.25
0.25
0.25
0.25
MIN
2
0.5
0.5
0.5
Figure 30
2
C data rate is determined by UART and can
1
1
S
C Control Channel
t
HD;STA
2
for timing parameters.
C timing information for data rates
TYP
0.25
0.25
0.25
0.25
0.5
0.5
0.5
1
1
2
C parameters scale with
MAX
2
2
C communication
C timing require-
t
SU;STO
I
2
C Timing
t UCLK*
t UCLK
t UCLK
t UCLK
t UCLK
t UCLK
t UCLK
t UCLK
t UCLK
UNIT
P
2
C.