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參數資料
| 型號： | MC14541BFR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 時鐘/數據恢復及定時提取 |
| 英文描述： | 1 TIMER(S), PROGRAMMABLE TIMER, PDSO14 |
| 封裝： | EIAJ, PLASTIC, SOIC-14 |
| 文件頁數： | 1/10頁 |
| 文件大?。?/td> | 163K |
| 代理商： | MC14541BFR2 |
Semiconductor Components Industries, LLC, 2006
October, 2006 Rev. 10
1
Publication Order Number:
MC14541B/D
MC14541B
Programmable Timer
The MC14541B programmable timer consists of a 16stage binary
counter, an integrated oscillator for use with an external capacitor and
two resistors, an automatic poweron reset circuit, and output control
logic.
Timing is initialized by turning on power, whereupon the poweron
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
16stage counter divides the oscillator frequency (fosc) with the nth
stage frequency being fosc/2n.
Features
Available Outputs 28, 210, 213 or 216
Increments on Positive Edge Clock Transitions
Builtin 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)
External Master Reset Totally Independent of Automatic Reset
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)
PbFree Packages are Available
PIN ASSIGNMENT
NC = NO CONNECTION
11
12
13
14
8
9
10
5
4
3
2
1
7
6
MODE
NC
A
B
VDD
Q
Q/Q SEL
NC
RS
Ctc
Rtc
VSS
MR
AR
http://onsemi.com
MARKING
DIAGRAMS
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W = Work Week
G or G
= PbFree Package
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
ORDERING INFORMATION
1
14
PDIP14
P SUFFIX
CASE 646
MC14541BCP
AWLYYWWG
SOIC14
D SUFFIX
CASE 751A
TSSOP14
DT SUFFIX
CASE 948G
1
14
14541BG
AWLYWW
14
541B
ALYWG
G
1
14
SOEIAJ14
F SUFFIX
CASE 965
1
14
MC14541B
ALYWG
(Note: Microdot may be in either location)
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