
SL6619
Direct Conversion FSK Data Receiver
Preliminary Information
The SL6619 is an advanced Direct Conversion FSK Data
Receiver for operation up to 450 MHz. The device integrates all
functions to convert a binary FSK modulated RF signal into a
demodulated data stream.
Adjacent channel rejection is provided using tuneable gyrator
filters. RF and audio AGC functions assist operation when large
interfering signals are present and an automatic frequency control
(AFC) function is provided to extend centre frequency acceptance.
Supersedes July 1996 version, DS3853 - 3.5
DS3853 - 4.1 April 1998
Fig. 2 Block diagram of SL6619
+
+
1·0V
1·08V
4
f
DETECTOR
MIXER
LIMITER
AFC
LIMITER
MIX
DEC
BEC VCC1 VCC2 GND REF
3
5
12
9 10 13
7
6 8
29
4
20
11
22
2
18
26
27
21
31
30
19
14
15 16 28
23 17
1
32
24 25
FEATURES
I
Very Low Power Operation from Single Cell
I
Superior Sensitivity
I
Operation at 512, 1200 and 2400 Baud
I
On Chip 1 Volt Regulator
I
1mm Height Miniature Package
I
Automatic Frequency Control Function
I
Programmable Post Detection Filter
I
AGC Detection Circuitry
I
Power Down Function
I
Battery Strength Indicator
APPLICATIONS
I
Pagers, including Credit Card, PCMCIA and
Watch Pagers
I
Low Data Rate Receivers, e.g. Security Systems
ORDERING INFORMATION
SL6619/KG/TP1N
1mm TQFP device, baked and dry
packed, supplied in trays
1mm TQFP device, baked and dry
packed, supplied in tape and reel
SL6619/KG/TP1Q
ABSOLUTE MAXIMUM RATINGS
Storage temperature
Operating temperature
Maximum voltage on any pin w.r.t. any
other pin, subject to the following conditions:
Current, pin 3 (MIXIP), pin 5 (MIXPB),
pin 12 (LOIPI) and pin 14 (LOIPB)
Most negative voltage on any pin
2
55
°
C to
1
150
°
C
2
10
°
C to
1
55
°
C
1
4V
<5ma
2
0·5V w.r.t. gnd
Fig. 1 Pin identification diagram (top view). See Table 1 for
pin descriptions
1
2
3
4
5
6
7
8
IRF
GND
MIXIP A
MIX DEC
MIXIP B
REG CNT
VREG
TPI
9 10 11 12 13 14 15 16
32 31 30 29 28 27 26 25
24
23
22
21
20
19
18
17
AFC1
BATT FLAG
VCC2
DATA OP
BEC
AFC OP
VREF
TPQ
I
I
V
L
G
L
Q
Q
G
T
I
T
V
B
B
A
TP32
SL6619