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參數資料
| 型號： | SK10E445PJ |
| 廠商： | Semtech Corporation |
| 英文描述： | 4-Bit Serial/Parallel Converter |
| 中文描述： | 4位串行/并行轉換器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 170K |
| 代理商： | SK10E445PJ |
!"
On-Chip Clock
÷
4 and
÷
8
2.0 Gb/s Data Rate Capability
Differential Clock and Serial Inputs
V
BB
Output for Single-Ended Input Applications
Asynchronous Data Synchronization
Mode Select to Expand to 8-Bits
Internal 75 k
Input Pulldown Resistors
ESD Protection of >4000V
Extended 100E VEE Range of –4.2V to –5.46V
Fully Compatible with MC10/100E445
Available in 28-Pin PLCC Package
D
Q
D
Q
D
Q
D
Q
Q3
Q2
Q1
Q0
SOUT
SOUT*
D
Q
D
Q
D
Q
D
Q*
D
Q
Out
D
Q
CL/4*
CL/4
CL/8*
CL/8
0
1
R
4
Out
R
2
Out
Latch
In
EN
RESET
SYNC
CLK*
CLK
MODE
SEL
SINA*
SINA
SINB*
SINB
The SK10/100E445 is an integrated 4-bit serial-to-
parallel data converter. The device is designed to operate
for NRZ data rates of up to 2.0 Gb/s. The chip generates
a divide by 4 and a divide by 8 clock for both 4-bit
conversion and a two chip 8-bit conversion function. The
conversion sequence was chosen to convert the first
serial bit to Q0, the second to Q1, etc.
Two selectable serial inputs provide a loopback capability
for testing purposes when the device is used in
conjunction with the R446 parallel to serial converter.
The start bit for conversion can be moved using the SYNC
input. A single pulse applied asynchronously for at least
two input clock cycles shifts the start bit for conversion
from Qn to Qn–1. For each additional shift required, an
additional pulse must be applied to the SYNC input.
Asserting the SYNC input will force the internal clock
dividers to “swallow” a clock pulse, effectively shifting a
bit from the Qn to the Qn–1 output (see Timing Diagram
B).
The MODE input is used to select the conversion mode
of the device. With the MODE input LOW, or open, the
device will function as a 4-bit converter. When the mode
input is driven HIGH, the data on the output will change
on every eighth clock cycle, thus allowing for an 8-bit
conversion scheme using two E445’s. When cascaded
in an 8-bit conversion scheme, the devices will not
operate at the 2.0 Gb/s data rate of a single device.
Refer to the applications section of this data sheet for
more information on cascading the E445.
For lower data rate applications, a V
BB
reference voltage
is supplied for single-ended inputs. When operating at
clock rates above 500 MHz, differential input signals
are recommended. For single-ended inputs, the V
BB
pin
is tied to the inverting differential input and bypassed
via a 0.01 μF capacitor. The V
BB
provides the switching
reference for the input differential amplifier. The V
BB
can also be used to AC couple an input signal.
Upon power-up, the internal flip-flops will attain a random
state. To synchronize multiple E445’s in a system, the
master reset must be asserted.
相關PDF資料 |
PDF描述 |
|---|---|
| SK10E445PJT | 4-Bit Serial/Parallel Converter |
| SK100E445 | 4-Bit Serial/Parallel Converter(100K系列,4位串行到并行數據轉換器) |
| SK10EL01W | 4-Input OR / NOR |
| SK100EL01W | 4-Input OR / NOR |
| SK10EL01WD | 4-Input OR / NOR |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SK10E445PJT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4-Bit Serial/Parallel Converter |
| SK10EL01W | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4-Input OR / NOR |
| SK10EL01WD | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4-Input OR / NOR |
| SK10EL01WDT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4-Input OR / NOR |
| SK10EL01WU | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4-Input OR / NOR |
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