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參數(shù)資料
| 型號： | PDU14-20 |
| 英文描述： | Delay Line |
| 中文描述： | 延遲線 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大?。?/td> | 58K |
| 代理商： | PDU14-20 |
PDU14F
Doc #97002
1/13/97
DATA DELAY DEVICES, INC.
2
Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
APPLICATION NOTES
ADDRESS UPDATE
The PDU14F is a memory device. As such,
special precautions must be taken when
changing the delay address in order to prevent
spurious output signals. The timing restrictions
are shown in Figure 1.
After the last signal edge to be delayed has
appeared on the OUT pin, a minimum time,
T
OAX
, is required before the address lines can
change. This time is given by the following
relation:
T
OAX
= max { (A
i
- A
i-1
) * T
INC
, 0 }
where A
i-1
and A
i
are the old and new address
codes, respectively. Violation of this constraint
may, depending on the history of the input signal,
cause spurious signals to appear on the OUT
pin. The possibility of spurious signals persists
until the required T
OAX
has elapsed.
A similar situation occurs when using the EN/
signal to disable the output while IN is active. In
this case, the unit must be held in the disabled
state until the device is able to “clear” itself. This
is achieved by holding the EN/ signal high and
the IN signal low for a time given by:
T
DISH
= A
i
* T
INC
Violation of this constraint may, depending on
the history of the input signal, cause spurious
signals to appear on the OUT pin. The
possibility of spurious signals persists until the
required T
DISH
has elapsed.
INPUT RESTRICTIONS
There are three types of restrictions on input
pulse width and period listed in the
AC
Characteristics
table. The
recommended
conditions are those for which the delay
tolerance specifications and monotonicity are
guaranteed. The
suggested
conditions are
those for which signals will propagate through the
unit without significant distortion. The
absolute
conditions are those for which the unit will
produce some type of output for a given input.
When operating the unit between the
recommended and absolute conditions, the
delays may deviate from their values at low
frequency. However, these deviations will
remain constant from pulse to pulse if the input
pulse width and period remain fixed. In other
words, the delay of the unit exhibits frequency
and pulse width dependence when operated
beyond the recommended conditions. Please
consult the technical staff at Data Delay Devices
if your application has specific high-frequency
requirements.
Please note that the increment tolerances listed
represent a design goal. Although most delay
increments will fall within tolerance, they are not
guaranteed throughout the address range of the
unit. Monotonicity is, however, guaranteed over
all addresses.
T
DISO
T
OAX
T
AENS
T
ENIS
PW
IN
TD
A
PW
OUT
T
DISH
A3-A0
EN/
IN
OUT
OUT/
Figure 1: Timing Diagram
A
i-1
A
i
T
SKEW
T
AIS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PDU14-20A4 | Delay Line |
| PDU14-20B4 | Delay Line |
| PDU14-20M | Delay Line |
| PDU14-20MC4 | Delay Line |
| PDU14-2A4 | Delay Line |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PDU14-20A4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Delay Line |
| PDU14-20B4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Delay Line |
| PDU14-20M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Delay Line |
| PDU14-20MC4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Delay Line |
| PDU1420T | 功能描述:電源排插 120 Volts 20 Amps 14 5-15R AC Recept RoHS:否 制造商:Wiremold 出口數(shù)量: 浪涌能量額定值: 數(shù)據(jù)線路保護(hù):N 電線長度:15 ft 安裝風(fēng)格: 輸出電壓:120 V 電流額定值:15 A |
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