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IW4541B Schematic ( PDF Datasheet ) - IK Semiconductor

Teilenummer IW4541B
Beschreibung Programmable Timer
Hersteller IK Semiconductor
Logo IK Semiconductor Logo 




Gesamt 6 Seiten
IW4541B Datasheet, Funktion
TECHNICAL DATA
IW4541B
Programmable Timer
High-Performance Silicon-Gate CMOS
The IW4541B 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 frequency equal to the
oscillator frequency divided by 2N. With the MODE input set to logic ”0” ORDERING INFORMATION
and after a MASTER RESET is initiated, the output (assuming Q output
has been selected) changes from a low to a high state after 2N-1 counts and
IW4541BN Plastic
IW4541BD SOIC
remains in that state until another MASTER RESET pulse is applied or TA = -55° to 125° C for all packages
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, VCC 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
t4u.comPIN 14 =VCC
e PIN 7 = GND
www.datashePINS 4,11 = NO CONNECTION
NC = NO CONNECTION
1






IW4541B Datasheet, Funktion
N SUFFIX PLASTIC DIP
(MS - 001AA)
A
14
1
8
B
7
FL
C
-T- SEATING
PLANE
N
G
KM
D
J
H
NOTES:
0.25 (0.010) M T
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
IW4541B
Symbol
A
B
C
D
F
G
H
J
K
L
M
N
Dimension, mm
MIN MAX
18.67 19.69
6.1 7.11
5.33
0.36 0.56
1.14 1.78
2.54
7.62
0° 10°
2.92 3.81
7.62 8.26
0.2 0.36
0.38
D SUFFIX SOIC
(MS - 012AB)
14
H
A
8
BP
1G
7
C
R x 45
-T-
D
NOTES:
SEATING
K PLANE
0.25 (0.010) M T C M
J
F
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B 0.25 mm (0.010) per side.
Symbol
A
B
C
D
F
G
H
MJ
K
M
P
R
Dimension, mm
MIN MAX
8.55 8.75
3.8 4
1.35 1.75
0.33 0.51
0.4 1.27
1.27
5.27
0° 8°
0.1 0.25
0.19 0.25
5.8 6.2
0.25 0.5
6

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