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IW4541BD 参数 Datasheet PDF下载

IW4541BD图片预览
型号: IW4541BD
PDF下载: 下载PDF文件 查看货源
内容描述: 可编程定时器高性能硅栅CMOS [Programmable Timer High-Performance Silicon-Gate CMOS]
分类和应用:
文件页数/大小: 5 页 / 139 K
品牌: INTEGRAL [ INTEGRAL CORP. ]
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TECHNICAL DATA
IW4541B
Programmable Timer
High-Performance Silicon-Gate CMOS
The IW4541 programmable timer consists of a 16-stage binary
counter, an oscillator that is controlled by external R-C components (2
resistors and a capacitor), an automatic power-on reset circuit, and
output control logic. The counter increments on positive-edge clock
transitons and can also be reset via the MASTER RESET input.
The output from this timer is the Q or not Q output from the 8th,
10th, 13th, or 16th counter stage. The desired stage is chosen using
time-select inputs A and B. The output is available in either of two
modes selectable via the MODE input, pin 10. When this MODE input
is a logic “1”,the output will be a continuous square wave having a
ORDERING INFORMATION
frequency equal to the oscillator frequency divided by 2
N
. With the
IW4541BN Plastic
MODE input set to logic ”0” and after a MASTER RESET is initiated,
IW4541BD SOIC
the output (assuming Q output has been selected) changes from a low
N-1
to a high state after 2 counts and remains in that state until another
T
A
= -55° to 125° C for all packages
MASTER RESET pulse is applied or the MODE input is set to a logic
“1”.
Timing is initialized by setting the AUTO RESET input (pin 5) to logic “0”and turning power on. If pin 5 is
set to logic “1”, the AUTO RESET circuit is disabled and counting will not start untill after a positive MASTER
RESET pulse is applied and returns to a low level. The AUTO RESET consumes an appreciable amount of
power and should not be used if low-power operation is desired. For reliable automatic power-on reset, V
CC
should be greater than 5V.
Operating Voltage Range: 3.0 to 18 V
Maximum input current of 1
µA
at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
Noise margin (over full package temperature range):
1.0 V min @ 5.0 V supply
2.0 V min @ 10.0 V supply
2.5 V min @ 15.0 V supply
LOGIC DIAGRAM
PIN ASSIGNMENT
NC = NO CONNECTION
PIN 14 =V
CC
PIN 7 = GND
PINS 4,11 = NO CONNECTION
173