- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385881 > SY100E016 (Micrel Semiconductor,Inc.) 8-Bit Synchronous Binary Up Counter(8位同步二進(jìn)制加法器) PDF資料下載
參數(shù)資料
| 型號(hào)： | SY100E016 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-Bit Synchronous Binary Up Counter(8位同步二進(jìn)制加法器) |
| 中文描述： | 8位二進(jìn)制計(jì)數(shù)器同步最多（8位同步二進(jìn)制加法器） |
| 文件頁(yè)數(shù)： | 7/9頁(yè) |
| 文件大?。?/td> | 116K |
| 代理商： | SY100E016 |
7
SY10E016
SY100E016
Micrel
is used as the divide output and the pulse duration is equal to
a full clock period. For even divide ratios twice the desired
divide ratio can be loaded into the E016 and the TC output can
feed the clock input of a toggle flip-flop to create a signal
divided as desired with a 50% duty cycle.
A single E016 can be used to divide by any ratio from 2 to
256, inclusive. If divide ratios of greater than 256 are needed,
multiple E016s can be cascaded in a manner similar to that
already discussed. When E016s are cascaded to build larger
dividers, the TCLD pin will no longer provide a means for
loading on terminal count. Because one does not want to
reload the counters until all of the devices in the chain have
reached terminal count, external gating of the TC pins must be
used for multiple E016 divider chains.
Figure 4 on the following page shows a typical block
diagram of a 32-bit divider chain. Once again, the maximize
the frequency of operation, E101 OR gates were used. For
lower frequency applications, a slower OR gate could replace
the E101. Note that for a 16-bit divider, the OR function
feeding the PE (program enable) input CANNOT be replaced
by a wire OR tie as the TC output of the least significant E016
must also feed the CE input of the most significant E016. If the
two TC outputs were OR tied, the cascaded count operation
would not operate properly. Because in the cascaded form
the PE feedback is external and requires external gating, the
maximum frequency of operation will be significantly less than
the same operation in a single device.
Maximizing E016 Count Frequency
The E016 device produces nine fast transitioning single-
ended outputs; thus, V
CC
noise can become significant in
situations where all of the outputs switch simultaneously in the
same direction. This V
CC
noise can negatively impact the
maximum frequency of operation of the device. Since the
device does not need to have the Q outputs terminated to
count properly, it is recommended that, if the outputs are not
going to be used in the rest of the system, they should be left
unterminated. In addition, if only a subset of the Q outputs are
used in the system, only those outputs should be terminated.
Not terminating the unused outputs will not only cut down the
V
CC
noise generated, but will also save in total system power
dissipation. Following these guidelines will allow designers to
either be more aggressive in their designs, or provide them
Divide
Ratio
Preset Data Inputs
P
4
P
7
P
6
P
5
P
3
P
2
P
1
P
0
2
3
4
5
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
L
L
H
L
H
L
H
112
113
114
H
H
H
L
L
L
L
L
L
H
L
L
L
H
H
L
H
H
L
H
H
L
H
L
254
255
256
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
Table 1. Preset Values for Various Divide Ratios
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SY100E111 | 1:9 Differential Clock Driver with Enable(帶使能端9選1差分時(shí)鐘驅(qū)動(dòng)器) |
| SY100E112JY | QUAD DRIVER |
| SY100E112JYTR | QUAD DRIVER |
| SY100E141JY | 8-BIT SHIFT REGISTER |
| SY100E141JYTR | 8-BIT SHIFT REGISTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY100E016JC | 功能描述:IC UPCOUNTER 8BIT SYNC 28-PLCC RoHS:否 類別:集成電路 (IC) >> 邏輯 -計(jì)數(shù)器，除法器 系列:100E 產(chǎn)品變化通告:1Q2012 Discontinuation 30/Mar/2012 標(biāo)準(zhǔn)包裝:2,500 系列:74HC 邏輯類型:二進(jìn)制計(jì)數(shù)器 方向:上 元件數(shù):1 每個(gè)元件的位元數(shù):12 復(fù)位:異步 計(jì)時(shí):- 計(jì)數(shù)速率:50MHz 觸發(fā)器類型:負(fù)邊沿 電源電壓:2 V ~ 6 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| SY100E016JC TR | 功能描述:IC UPCOUNTER 8BIT SYNC 28-PLCC RoHS:否 類別:集成電路 (IC) >> 邏輯 -計(jì)數(shù)器，除法器 系列:100E 產(chǎn)品變化通告:1Q2012 Discontinuation 30/Mar/2012 標(biāo)準(zhǔn)包裝:2,500 系列:74HC 邏輯類型:二進(jìn)制計(jì)數(shù)器 方向:上 元件數(shù):1 每個(gè)元件的位元數(shù):12 復(fù)位:異步 計(jì)時(shí):- 計(jì)數(shù)速率:50MHz 觸發(fā)器類型:負(fù)邊沿 電源電壓:2 V ~ 6 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| SY100E016JCTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:8-BIT SYNCHRONOUS BINARY UP COUNTER |
| SY100E016JI | 功能描述:IC UPCOUNTER 8BIT SYNC 28-PLCC RoHS:否 類別:集成電路 (IC) >> 邏輯 -計(jì)數(shù)器，除法器 系列:100E 產(chǎn)品變化通告:1Q2012 Discontinuation 30/Mar/2012 標(biāo)準(zhǔn)包裝:2,500 系列:74HC 邏輯類型:二進(jìn)制計(jì)數(shù)器 方向:上 元件數(shù):1 每個(gè)元件的位元數(shù):12 復(fù)位:異步 計(jì)時(shí):- 計(jì)數(shù)速率:50MHz 觸發(fā)器類型:負(fù)邊沿 電源電壓:2 V ~ 6 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| SY100E016JITR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:8-BIT SYNCHRONOUS BINARY UP COUNTER |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。