- 您现在的位置：买卖IC网 > PDF目录383091 > ICM7213IPD (INTERSIL CORP) One Second/One Minute Timebase Generator PDF资料下载
参数资料
| 型号： | ICM7213IPD |
| 厂商： | INTERSIL CORP |
| 元件分类： | 光电元器件 |
| 英文描述： | One Second/One Minute Timebase Generator |
| 中文描述： | TIME BASE GENERATOR, PDIP14 |
| 封装： | PLASTIC, DIP-14 |
| 文件页数： | 6/6页 |
| 文件大小： | 47K |
| 代理商： | ICM7213IPD |
9-14
Detailed Description
Supply Voltage Considerations
The ICM7213 may be used to provide various precision
outputs with frequencies from 2048Hz to
1
/
60
Hz using a
4.194304MHz quartz oscillator, and other output frequencies
may be obtained using other quartz crystal frequencies.
Since the ICM7213 uses dynamic high frequency dividers for
the initial frequency division there are limitations on the
V
SUPPLY
range depending on the oscillator frequency. If, for
example, a low frequency quartz crystal is selected, the
V
SUPPLY
should be selected in the center of the operating
window, or approximately 1.7V.
The V
SUPPLY
to the ICM7213 may be derived from a high
voltage supply by using a simple resistor divider (if power is
of no concern), by using a series resistor for minimum
current consumption, or by means of a regulator.
Outputs
Pull up resistors will generally be required to interface with
other logic families. These resistors must be connected
between the various outputs and the positive power supply.
Oscillator Considerations
The oscillator consists of a CMOS inverter and a feedback
resistor whose value is dependent on the voltage at the
oscillator input and output terminals and the V
SUPPLY
.
Oscillator stabilities of approximately 0.1ppm per 0.1V varia-
tion are achievable with a nominal V
SUPPLY
of 5V and a sin-
gle voltage dropping resistor. The crystal specifications are
shown in the Test Circuit.
It is recommended that the crystal load capacitance (CL) be
no greater than 22pF for a crystal having a series resistance
equal to or less than 75
, otherwise the output amplitude of
the oscillator may be too low to drive the divider reliably.
It a very high quality oscillator is desired, it is recommended
that a quartz crystal be used having a tight tuning tolerance
±
10ppm, a low series resistance (less than 25
), a low
motional capacitance of 5mpF and a load capacitance of
20pF. The fixed capacitor C
IN
should be 30pF and the oscil-
lator tuning capacitor should range between approximately
16pF and 60pF.
Use of a high quality crystal will result in typical stabilities of
0.05ppm per 0.1V change of V
SUPPLY
.
Control Inputs
The TEST input inhibits the 2
18
output and applies the 2
9
output to the 2
21
divider, thereby permitting a speedup of the
testing of the
÷
60 section by a factor of 2048 times. This
also results in alternative output frequencies (see table).
The WIDTH input may be used to change the pulse width of
OUT 4 from 125ms to 1s, or to change the state of OUT 4
frAll Intersil semiconductor products are manufactured, assembled and tested under
ISO9000
quality systems certification.
and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which
may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
ICM
7213
V
S
+
R
1
R
2
I
2
V
S
-
I
1
V
DD
V
SS
C
BYPASS
0.01
μ
F
EXAMPLE:
f = 4.2MHz
8V
≤
V
≤
12V (10 NOMINAL)
I
1
≈
100
μ
A
I
2
≈
1mA
R
2
≈
3k
R
1
≈
6.8k
FIGURE 9A.
EXAMPLE:
f
OSC
= 4.2MHz
8V
≤
V
≤
12V (10 NOMINAL)
I
1
≈
100
μ
A
R3 = (10 - 3)
10 - 4
≈
68k
k
ICM
7213
V
S
+
R
3
V
S
-
I
1
V
DD
V
SS
C
BYPASS
0.01
μ
F
FIGURE 9B.
FIGURE 9. BIASING SCHEMES WITH HIGH VOLTAGE SUPPLIES
ICM7213
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate
For information regarding Intersil Corporation and its products, see web site
http://www.intersil.com
相关PDF资料 |
PDF描述 |
|---|---|
| ICM7216A | 8-Digit, Multi-Function, Frequency Counters/Timers |
| ICM7216BlPl | 8-Digit, Multi-Function, Frequency Counters/Timers |
| ICM7216D | 8-Digit, Multi-Function, Frequency Counters/Timers |
| ICM7216DlPl | 8-Digit, Multi-Function, Frequency Counters/Timers |
| ICM7216AlJl | Circular Connector; No. of Contacts:79; Series:MS27496; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:21; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:21-35 RoHS Compliant: No |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICM7213IPD WAF | 制造商:Harris Corporation 功能描述: |
| ICM7215 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TIMEKEEPING DTMF CIRCUITS |
| ICM7216 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:N-CHANNEL JFET |
| ICM7216 WAF | 制造商:Harris Corporation 功能描述: |
| ICM7216A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TIMERS COUNTERS AND DISPLAY DRIVERS |
发布紧急采购，3分钟左右您将得到回复。