|
|
PDF MC14521BDG Data sheet ( Hoja de datos )
| Número de pieza | MC14521BDG | |
| Descripción | 24-Stage Frequency Divider | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MC14521BDG (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
MC14521B
24-Stage Frequency Divider
The MC14521B consists of a chain of 24 flip−flops with an input
circuit that allows three modes of operation. The input will function as a
crystal oscillator, an RC oscillator, or as an input buffer for an external
oscillator. Each flip−flop divides the frequency of the previous flip−flop
by two, consequently this part will count up to 224 = 16,777,216.
The count advances on the negative going edge of the clock.
The outputs of the last seven−stages are available for added flexibility.
http://onsemi.com
Features
• All Stages are Resettable
• Reset Disables the RC Oscillator for Low Standby Power Drain
• RC and Crystal Oscillator Outputs Are Capable of Driving External
Loads
• Test Mode to Reduce Test Time
• VDD′ and VSS′ Pins Brought Out on Crystal Oscillator Inverter to
Allow the Connection of External Resistors for Low−Power Operation
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Capable of Driving Two Low−Power TTL Loads or One Low−Power
Schottky TTL Load over the Rated Temperature Range
• NLV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
• This Device is Pb−Free and is RoHS Compliant
MAXIMUM RATINGS (Voltages Referenced to VSS)
Parameter
Symbol
Value
Unit
DC Supply Voltage Range
VDD −0.5 to +18.0 V
Input or Output Voltage Range
(DC or Transient)
Vin, Vout − 0.5 to VDD
+0.5
V
Input or Output Current (DC or Transient) Iin, Iout ±10 mA
per Pin
Power Dissipation, per Package (Note 1)
PD
500 mW
Ambient Temperature Range
TA −55 to +125 °C
Storage Temperature Range
Tstg − 65 to +150 °C
Lead Temperature (8−Second Soldering)
TL
260 °C
Stresses exceeding those listed in the Maximum Ratings table may damage the
device. If any of these limits are exceeded, device functionality should not be
assumed, damage may occur and reliability may be affected.
1. Temperature Derating: “D/DW” Package: –7.0 mW/_C From 65_C To 125_C
This device contains protection circuitry to guard against damage due to high
static voltages or electric fields. However, precautions must be taken to avoid
applications 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 ≤ (Vin or Vout) ≤ VDD.
Unused inputs must always be tied to an appropriate logic voltage level
(e.g., either VSS or VDD). Unused outputs must be left open.
1
SOIC−16
D SUFFIX
CASE 751B
PIN ASSIGNMENT
Q24
RESET
VSS4
OUT 2
VDD4
IN 2
OUT1
VSS
1
2
3
4
5
6
7
8
16 VDD
15 Q23
14 Q22
13 Q21
12 Q20
11 Q19
10 Q18
9 IN 1
MARKING DIAGRAMS
16
14521BG
AWLYWW
1
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
July, 2014 − Rev. 10
1
Publication Order Number:
MC14521B/D
1 page  
PULSE
GENERATOR
MC14521B
VDD
VDD
IN 2
R
VSS
VDD′
Q18
Q19 CL
Q20 CL
Q21 CL
Q22 CL
Q23 CL
Q24 CL
CL
VSS′
IN 2
Qn
20 ns
20 ns
90%
10% 50%
tWL tWH
90%
50%
10%
tPLH
tTLH
20 ns
tPHL
tTHL
Figure 2. Switching Time Test Circuit and Waveforms
VDD
Ro
R*
18 M
VDD VDD′
IN 1 OUT 1
OUT 2
Q18
Q19
IN 2 Q20
CS CT
Q21
Q22
Q23
R Q24
VSS VSS′
R*
*Optional for low power operation,
10 kW ≤ R ≤ 70 kW.
Figure 3. Crystal Oscillator Circuit
Characteristic
500 kHz 50 kHz
Circuit Circuit
Unit
Crystal Characteristics
Resonant Frequency
Equivalent Resistance, RS
500 50 kHz
1.0 6.2 kW
External Resistor/Capacitor Values
Ro
CT
CS
47 750 kW
82 82 pF
20 20 pF
Frequency Stability
Frequency Change as a Function
of VDD (TA = 25_C)
VDD Change from 5.0 V to 10 V
VDD Change from 10 V to 15 V
+ 6.0
+ 2.0
+ 2.0
+ 2.0
ppm
ppm
Frequency Change as a Function
of Temperature (VDD = 10 V)
TA Change from – 55_C to + 25_C
MC14521 only
– 4.0
+ 100
– 2.0
+ 120
ppm
ppm
Complete Oscillator*
TA Change from + 25_C to + 125_C
MC14521 only
– 2.0
– 160
– 2.0
– 560
ppm
ppm
Complete Oscillator*
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ*Complete oscillator includes crystal, capacitors, and resistors.
Figure 4. Typical Data for Crystal Oscillator Circuit
http://onsemi.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC14521BDG.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MC14521BDG | 24-Stage Frequency Divider | ON Semiconductor |
| MC14521BDR2G | 24-Stage Frequency Divider | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |