LMX2335 National Semiconductor, LMX2335 Datasheet - Page 11
![no-image](/images/manufacturer_photos/0/4/469/national_semiconductor_sml.jpg)
LMX2335
Manufacturer Part Number
LMX2335
Description
PLLatinum Dual Frequency Synthesizer for RF Personal Communications
Manufacturer
National Semiconductor
Datasheet
1.LMX2335.pdf
(18 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LMX2335LM
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LMX2335LTM
Manufacturer:
NS
Quantity:
7 096
Company:
Part Number:
LMX2335LTMF
Manufacturer:
DDK
Quantity:
2 500
Part Number:
LMX2335LTMG
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LMX2335LTMX
Manufacturer:
NEC
Quantity:
1 500
Part Number:
LMX2335M
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LMX2335MC
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LMX2335MX
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LMX2335MX/NOPB
Manufacturer:
NS
Quantity:
10 266
Functional Description
(Continued)
Note 9: When the F
LD output is disabled it is actively pulled to a low logic state.
o
Note 10: Lock detect output provided to indicate when the VCO frequency is in “lock”. When the loop is locked and a lock detect mode is selected, the pins output
is HIGH, with narrow pulses LOW. In the RF1/RF2 lock detect mode a locked condition is indicated when RF2 and RF1 are both locked.
Note 11: The Fastlock mode utilized the F
LD output pin to switch a second loop filter damping resistor to ground during fastlock operation. Activation of Fastlock
o
occurs whenever the RF loop’s Icpo magnitude bit # 17 is selected HIGH (while the # 19 and # 20 mode bits are set for Fastlock).
Note 12: The Counter Reset mode bits R19 and R20 when activated reset all counters. Upon removal of the Reset bits the N counter resumes counting in “close”
alignment with the R counter. (The maximum error is one prescaler cycle). If the Reset bits are activated the R counter is also forced to Reset, allowing smooth ac-
quisition upon powering up.
SERIAL DATA INPUT TIMING
DS012332-8
Notes: Parenthesis data indicates programmable reference divider data.
Data shifted into register on clock rising edge.
Data is shifted in MSB first.
Test Conditions: The Serial Data Input Timing is tested using a symmetrical waveform around V
/2. The test waveform has an edge rate of 0.6V/ns with
CC
@
= 2.7V and 2.6V
@
= 5.5V.
amplitudes of 2.2V
V
V
CC
CC
PHASE COMPARATOR AND INTERNAL CHARGE PUMP CHARACTERISTICS
DS012332-9
Notes: Phase difference detection range: −2 to +2
The minimum width pump up and pump down current pulses occur at the D
pin when the loop is locked.
o
11
www.national.com