sl4541b System Logic Semiconductor. co., sl4541b Datasheet

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sl4541b

Manufacturer Part Number
sl4541b
Description
Programmable Timer
Manufacturer
System Logic Semiconductor. co.
Datasheet
Programmable Timer
High-Performance Silicon-Gate CMOS
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.
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 2
MODE input set to logic ”0” and after a MASTER RESET is initiated,
the output (assuming Q output has been selected) changes from a low
to a high state after 2
MASTER RESET pulse is applied or the MODE input is set to a logic
“1”.
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
greater than 5V.
SLS
The SL4541 programmable timer consists of a 16-stage binary
The output from this timer is the Q or not Q output from the 8th,
Timing is initialized by setting the AUTO RESET input (pin 5) to logic “0”and turning power on. If pin 5 is set
Operating Voltage Range: 3.0 to 18 V
Maximum input current of 1 A at 18 V over full package-temperature range; 100 nA at 18 V and 25 C
Noise margin (over full package temperature range):
System Logic
Semiconductor
PINS 4,11 = NO CONNECTION
LOGIC DIAGRAM
1.0 V min @ 5.0 V supply
2.0 V min @ 10.0 V supply
2.5 V min @ 15.0 V supply
PIN 7 = GND
PIN 14 =V
N-1
counts and remains in that state until another
CC
N
. With the
PIN ASSIGNMENT
NC = NO CONNECTION
T
A
ORDERING INFORMATION
= -55 to 125 C for all packages
SL4541BN Plastic
SL4541BD SOIC
SL4541B
CC
should be

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sl4541b Summary of contents

Page 1

... 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 PIN 7 = GND PINS 4, CONNECTION System Logic SLS Semiconductor SL4541B ORDERING INFORMATION N . With the SL4541BN Plastic SL4541BD SOIC T = -55 to 125 C for all packages A PIN ASSIGNMENT CONNECTION should be CC ...

Page 2

... SL4541B * MAXIMUM RATINGS Symbol Parameter V DC Supply Voltage (Referenced to GND Input Voltage (Referenced to GND Output Voltage (Referenced to GND) OUT I DC Input Current, per Pin IN P Power Dissipation in Still Air, Plastic DIP Power Dissipation per Output Transistor D Tstg Storage Temperature ...

Page 3

... GND GND =0 GND =2 =4 =13 SL4541B Guaranteed Limit -55 25 125 Unit 3.5 3.5 3 1.5 1.5 1 4.95 4.95 4.95 V 9.95 9.95 9.95 14.95 14.95 14.95 0.05 0.05 0.05 V 0.05 0.05 0.05 0.05 ...

Page 4

... SL4541B AC ELECTRICAL CHARACTERISTICS Symbol Parameter f Maximum Clock Frequency (Figure 1) max PLH PHL Maximum Propagation Delay, Clock to Q (Figure 1) t Maximum Output Transition Time, Any Output THL (Figure 1) t Maximum Output Transition Time, Any Output TLH (Figure 1) C Maximum Input Capacitance ...

Page 5

... Figure 1. Switching Weveforms FUNCTION TABLE Count PIN N 2 8192 5 Auto Reset On 1024 6 Master Reset Off 256 9 Output Initially Low After Reset 65536 10 Single Transition Mode SL4541B STATE 0 1 Auto Reset Disable Master Reset On Output Initially High After Reset (not Q) (Q) Recycle Mode ...

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