(VCC = 4.5 to 5.5V; TA = –40 to 85°C, unless otherwise noted.)
Characteristic
Toggle Frequency (Sine Wave Input)
Supply Current Output Unloaded (Pin 2)
Modulus Control Input High (MC)
Modulus Control Input Low (MC)
Divide Ratio Control Input High (SW)
Divide Ratio Control Input Low (SW)
Output Voltage Swing (CL = 12 pF; RL = 2.2 kΩ)
Modulus Setup Time MC to Out
Input Voltage Sensitivity 250–1100 MHz
100–250 MHz
Output Current (CL = 12 pF; RL = 2.2 kΩ)
Symbol
ft
ICC
VIH1
VIL1
VIH2
VIL2
Vout
tset
Vin
IO
Min
0.1
–
2.0
–
VCC
Open
1.0
–
100
400
–
Typ
1.4
4.0
–
–
VCC
Open
1.6
11
–
–
1.5
Max
1.1
6.5
VCC
0.8
VCC
Open
–
16
1500
1500
4.0
Unit
GHz
V
V
Vdc
–
Vpp
ns
mVpp
mA
LIFETIME BUY
Figure 1. Logic Diagram (MC12028A)
Figure 2. Modulus Setup Time
D
A
C
Q
D
B
Q
D
C
Q
QB
Prop. Delay
In
QB
C
QB
C M
In
In
Out
MC
MC Setup
D
D
C
QB
C
Q
D
E
Q
C
QB
D
F
QB
C
Q
D
QB
G
Q
D
H
C S Q
QB
MC
Out
MC Release
Modulus setup time MC to out is the MC
setup or MC release plus the prop delay.
SW
Figure 3. Typical Output Waveform
500 m≈
20 ns
2
MOTOROLA RF/IF DEVICE DATA
LAST ORDER 19/12/99
LAST SHIP 18/06/00
mA
MC12028A MC12028B
Figure 4. AC Test Circuit
C3
Sine Wave Generator
C1
50
Ω
C2
In
MC
Gnd
In
Out
RL
CL
External Components:
C1 = C2 = 1000 pF
C3 = 0.1
µF
CL = 12 pF (Including Scope and jig capacitance)
RL = 2.2 kΩ
VCC = 4.5 to 5.5 V
VCC
SW
MC Input
LIFETIME BUY
Figure 5. Typical Input Impedance versus Input Frequency
1000
900
800
700
600
R
400
300
200
100
Ohms
0
0.1
–100
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
GHz
–200
jX
–300
–400
–500
–600
MOTOROLA RF/IF DEVICE DATA
3
LAST ORDER 19/12/99
500
LAST SHIP 18/06/00
MC12028A MC12028B
Figure 6. Input Signal Amplitude versus Input Frequency
15
10
5.0
0
Amplitude (dBm)
– 5.0
–10
–15
– 20
– 25
– 30
– 35
– 40
– 45
1250
710
400
225
125
71
40
22.5
12.8
7.1
4.0
2.25
1.25
0.71
mVrms
LIFETIME BUY
– 50
2000
1600
1200
800
400
0
0
200
400
600
800
1000
1200
1400
1600
FREQUENCY (MHz)
Divide Ratio = 32
4
MOTOROLA RF/IF DEVICE DATA
LAST ORDER 19/12/99
LAST SHIP 18/06/00
mVpp
MC12028A MC12028B
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751–06
(SO–8)
ISSUE T
C
5
A
8
D
E
1
4
H
0.25
M
B
M
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETER.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
DIM
A
A1
B
C
D
E
e
H
h
L
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
4.80
5.00
3.80
4.00
1.27 BSC
5.80
6.20
0.25
0.50
0.40
1.25
0
_
7
_
h
B
C
e
A
SEATING
PLANE
X 45
_
q
LIFETIME BUY
L
0.10
A1
B
0.25
M
C B
S
A
S
q
8
5
–B–
1
4
P SUFFIX
PLASTIC PACKAGE
CASE 626–05
ISSUE K
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
F
NOTE 2
L
C
–T–
SEATING
PLANE
J
N
D
K
M
M
H
G
0.13 (0.005)
T A
M
DIM
A
B
C
D
F
G
H
J
K
L
M
N
B
M
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
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and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
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最近在写一个人机界面，由于硬件同事布板的问题，必须要用到串口4，先开始我还觉得没什么，就是把USART1改成4以及改下开启时钟和配置引脚。 但是事实证明我的想法是多么愚蠢，调了整整2天，UART4发送很好，但是就是在接收时死活的卡在中断之前，就会进入HardFaultException B HardFaultException。真是百思不得其解，我就一步步调试跟踪，也没有发...[详细]
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