mc145156 Lansdale Semiconductor, Inc., mc145156 Datasheet - Page 8

• Manufacturer Part Number: mc145156
• Description: Pll Frequency Synthesizer Family
• Manufacturer: Lansdale Semiconductor, Inc.

LANSDALE Semiconductor, Inc.
Page 8 of 35
NOTES:
(ON–CHIP OSC.
15.360 MHz
OPTIONAL)
REF. OSC.
1. Receiver 1st I.F. = 45 MHz, low side injection; Receiver 2nd I.F. = 11.7 MHz, low side injection.
2. Duplex operation with 45 MHz receiver/transmit separation.
3. f R = 7.5 kHz; ÷ R = 2048.
4. N total = N 64 + A = 27501 to 28166; N = 429 to 440; A = 0 to 63.
5. ML145158 may be used where serial data entry is desired.
6. High frequency prescalers may be used for higher frequency VCO and f ref
7. The φ R and φ V outputs are fed to an external combiner/loop filter. See the Phase–Locked Loop — Low–Pass Filter Design page for
+ V
implementations.
additional information. The φ R and φ V outputs swing rail–to–rail. Therefore, the user should be careful not to exceed the common mode
input range of the op amp used in the combiner/loop filter.
OSC in
V DD
V SS
N9
OSC out
X2
Figure 2. 666–Channel, Computer–Controlled, Mobile Radiotelephone Synthesizer
CHANNEL PROGRAMMING
RA2
ML145152
“1”
NOTE 5
NO CONNECTS
RA1
“1”
N0
A5
RA0
“1”
for 800 MHz Cellular Radio Systems
LD
A0
φ R
MC
φ V
f in
www.lansdale.com
LOCK DETECT SIGNAL
R1
R1
RECEIVER 2ND L.O.
30.720 MHz
R2
ML145152 Data Sheet Continued on Page 23
C
R2
–
+
NOTE 7
C
÷ 64/65 PRESCALER
VCO
ML12017
NOTE 6
825.030 → 844.980 MHz
RECEIVER FIRST L.O.
(30 kHz STEPS)
TRANSMITTER
MODULATION
NOTE 6
X4
825.030 → 844.980 MHz
TRANSMITTER SIGNAL
(30 kHz STEPS)
NOTE 6
X4
ML145152
Issue A