HFA3524 查看數據表（PDF） - Intersil
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HFA3524 Datasheet PDF : 15 Pages
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Pinout
HFA3524
HFA3524 (TSSOP)
TOP VIEW
VCC1 1
VP1 2
DO RF 3
GND 4
fIN RF 5
fIN RF 6
GND 7
OSCIN 8
GND 9
FO/LD 10
20 VCC2
19 VP2
18 DO IF
17 GND
16 fIN IF
15 f IN IF
14 GND
13 LE
12 DATA
11 CLOCK
Pin Descriptions
PIN
NUMBER
1
PIN NAME
VCC1
2
VP1
3
DO RF
4
GND
5
fIN RF
6
f IN RF
7
GND
8
OSCIN
9
GND
10
FO/LD
11
Clock
12
Data
13
LE
14
GND
15
f IN IF
16
fIN IF
17
GND
18
DO IF
19
VP2
20
VCC2
I/O
DESCRIPTION
-
Power supply voltage input. Input may range from 2.7V to 5.5V. VCC1 must equal VCC2. Bypass
capacitors should be placed as close as possible to this pin and be connected directly to the ground
plane.
-
Power Supply for RF charge pump. Must be > VCC.
O
Internal charge pump output. For connection to a loop filter for driving the input of an external VCO.
-
Ground.
I
RF prescaler input. Small signal input from the VCO.
l
RF prescaler complimentary input. A bypass capacitor should be placed as close as possible to this
pin and be connected directly to the ground plane. Capacitor is optional with some loss of sensitivity.
-
Ground.
I
Oscillator input. The input has a VCC/2 input threshold and can be driven from an external CMOS
or TTL logic gate.
-
Ground.
O
Multiplexed output of the RF/lF programmable or reference dividers, RF/lF lock detect signals and
Fastlock mode. CMOS output (see Programmable Modes).
I
High impedance CMOS Clock input. Data for the various counters is clocked in on the rising edge,
into the 22-bit shift register.
l
Binary serial data input. Data entered MSB first. The last two bits are the control bits. High
impedance CMOS input.
l
Load enable CMOS input. When LE goes HIGH, data stored in the shift registers is loaded into one
of the 4 appropriate latches (control bit dependent).
-
Ground.
I
IF prescaler complimentary input. A bypass capacitor should be placed as close as possible to
this pin and be connected directly to the ground plane. Capacitor is optional with some loss of
sensitivity.
I
IF prescaler input. Small signal input from the VCO.
-
Ground.
O
IF charge pump output. For connection to a loop filter for driving the input of an external VCO.
-
Power Supply for IF charge pump. Must be >VCC.
-
Power supply voltage input Input may range from 2.7V to 5.5V. VCC2 must equal VCC1. Bypass
capacitors should be placed as close as possible to this pin and be connected directly to the ground
plane.
3
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