FM IF RECEIVER
S1T8513A
INTRODUCTION
The S1T8513A is designed for FM IF Detection on the pager set. It includes a voltage regulator, low battery detection circuit, Mixer, Oscillator, FSK comparator and limiting IF Amplifier.
20−SSOP−225
FEATURES
• • • • • • • • Operating voltage range: 1.0 ~ 4.0V Typical supply current: 1.1mA at 1.4V Low battery detection circuit (alarm function): 1.05V Voltage regulator : Vreg = 1.0V (Typ.) Mixer operating frequency: 10 ~ 50MHz High transmitting rate: 1200 .
FM IF RECEIVER
FM IF RECEIVER
S1T8513A
INTRODUCTION
The S1T8513A is designed for FM IF Detection on the pager set. It includes a voltage regulator, low battery detection circuit, Mixer, Oscillator, FSK comparator and limiting IF Amplifier.
20−SSOP−225
FEATURES
• • • • • • • • Operating voltage range: 1.0 ~ 4.0V Typical supply current: 1.1mA at 1.4V Low battery detection circuit (alarm function): 1.05V Voltage regulator : Vreg = 1.0V (Typ.) Mixer operating frequency: 10 ~ 50MHz High transmitting rate: 1200 / 2400bps FSK Data reception Package type: 20-SSOP (0.65mm)
ORDERING INFORMATION
Device S1T8513A02-V0B0 Package 20-SSOP-225 Operating Temperature −20°C to +70°C
BLOCK DIAGRAM
MI
20
GND
19
REGO REGC
18 17
AO
16
FSKO
15
QC
14
BSC
13
LPFO
12
LPFI
11
1.0V Reg
2’nd MIX
FSK COMP.
Quick Charge
filter AMP
Alarm
audio AMP
X-tal Osc
1 2 3 4
Limiting IF Amplifier
5 6 7 8
Quad Detector
9 10
OSCI
OSCO
MO
Vcc
LI
LD
FSKI
IFO
QD
RAO
1
S1T8513A
FM IF RECEIVER
PIN CONFIGURATION
OSCI OSCO MO Vcc LI LD FSKI IFO QD RAO
1 2 3 4 5 6 7 8 9 10
20 19 `18 17
MI GND REGO REGC AO FSKO QC BSC LPFO LPFI
KA8513B S1T8513A
16 15 14 13 12 11
2
FM IF RECEIVER
S1T8513A
PIN DESCRIPTION
Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol OSCI OSCO MO VCC LI LD FSK1 IFO QD RAO LPFI LPFO BSC QC FSKO AO REGC REGO GND MI Description Oscillator input. The oscillator is an internally-biased colpitts type. Oscillator output. Mixer output pin. Output impedance ≈ 2kΩ. Connect a.