參數(shù)資料
型號: MC14541BFL1
廠商: ON SEMICONDUCTOR
元件分類: 時鐘/數(shù)據(jù)恢復及定時提取
英文描述: 1 TIMER(S), PROGRAMMABLE TIMER, PDSO14
封裝: EIAJ, PLASTIC, SOIC-14
文件頁數(shù): 1/10頁
文件大?。?/td> 230K
代理商: MC14541BFL1
Semiconductor Components Industries, LLC, 2000
March, 2000 – Rev. 6
1
Publication Order Number:
MC14541B/D
MC14541B
Programmable Timer
The MC14541B programmable timer consists of a 16–stage binary
counter, an integrated oscillator for use with an external capacitor and
two resistors, an automatic power–on reset circuit, and output control
logic.
Timing is initialized by turning on power, whereupon the power–on
reset is enabled and initializes the counter, within the specified VDD
range. With the power already on, an external reset pulse can be
applied. Upon release of the initial reset command, the oscillator will
oscillate with a frequency determined by the external RC network. The
16–stage counter divides the oscillator frequency (fosc) with the nth
stage frequency being fosc/2n.
Available Outputs 28, 210, 213 or 216
Increments on Positive Edge Clock Transitions
Built–in Low Power RC Oscillator (± 2% accuracy over temperature
range and
± 20% supply and ± 3% over processing at < 10 kHz)
Oscillator May Be Bypassed if External Clock Is Available (Apply
external clock to Pin 3)
Operation
Operates as 2n Frequency Divider or Single Transition Timer
Q/Q Select Provides Output Logic Level Flexibility
Reset (auto or master) Disables Oscillator During Resetting to
Provide No Active Power Dissipation
Clock Conditioning Circuit Permits Operation with Very Slow Clock
Rise and Fall Times
Automatic Reset Initializes All Counters On Power Up
Supply Voltage Range = 3.0 Vdc to 18 Vdc with Auto Reset
Supply Voltage Range = Disabled (Pin 5 = VDD)
Supply Voltage Range = 8.5 Vdc to 18 Vdc with Auto Reset
Supply Voltage Range = Enabled (Pin 5 = VSS)
MAXIMUM RATINGS (Voltages Referenced to VSS) (Note 2.)
Symbol
Parameter
Value
Unit
VDD
DC Supply Voltage Range
– 0.5 to +18.0
V
Vin, Vout
Input or Output Voltage Range
(DC or Transient)
– 0.5 to VDD + 0.5
V
Iin
Input Current (DC or Transient)
±10 (per Pin)
mA
Iout
Output Current (DC or Transient)
±45 (per Pin)
mA
PD
Power Dissipation,
per Package (Note 3.)
500
mW
TA
Ambient Temperature Range
– 55 to +125
°C
Tstg
Storage Temperature Range
– 65 to +150
°C
TL
Lead Temperature
(8–Second Soldering)
260
°C
2. Maximum Ratings are those values beyond which damage to the device
may occur.
3. Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/
_C From 65_C To 125_C
http://onsemi.com
A
= Assembly Location
WL or L
= Wafer Lot
YY or Y
= Year
WW or W = Work Week
Device
Package
Shipping
ORDERING INFORMATION
MC14541BCP
PDIP–14
2000/Box
MC14541BD
SOIC–14
55/Rail
MC14541BDR2
SOIC–14
2500/Tape & Reel
1. For ordering information on the EIAJ version of
the SOIC packages, please contact your local
ON Semiconductor representative.
MC14541BDTR2
TSSOP–14 2500/Tape & Reel
MC14541BDT
TSSOP–14
96/Rail
MC14541BF
SOEIAJ–14
See Note 1.
This device contains protection circuitry to guard
against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid ap-
plications of any voltage higher than maximum rated
voltages to this high–impedance circuit. For proper
operation, Vin and Vout should be constrained to the
range VSS v (Vin or Vout) v VDD.
Unused inputs must always be tied to an appropriate
logic voltage level (e.g., either VSS or VDD). Unused out-
puts must be left open.
MC14541BFEL
SOEIAJ–14
See Note 1.
MARKING
DIAGRAMS
1
14
PDIP–14
P SUFFIX
CASE 646
MC14541BCP
AWLYYWW
SOIC–14
D SUFFIX
CASE 751A
TSSOP–14
DT SUFFIX
CASE 948G
1
14
14541B
AWLYWW
14
541B
ALYW
1
14
SOEIAJ–14
F SUFFIX
CASE 965
1
14
MC14541B
AWLYWW
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