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S1T8515A

Samsung semiconductor
Part Number S1T8515A
Manufacturer Samsung semiconductor
Description FM IF RECEIVER FOR FLEX PAGER
Published Apr 17, 2005
Detailed Description FM IF RECEIVER FOR FLEX PAGER S1T8515A INTRODUCTION The S1T8515A is a designed for FM detection on the FLEX pager set....
Datasheet PDF File S1T8515A PDF File

S1T8515A
S1T8515A

Overview
FM IF RECEIVER FOR FLEX PAGER S1T8515A INTRODUCTION The S1T8515A is a designed for FM detection on the FLEX pager set.
It consists of an Oscillator, Mixer, Limiting IF Amp.
Quadrature Detector, Regulator, RSSI (Received Signal Strength Indicator), Bit Rate Filter, and a 2-level / 4-level FSK comparator.
It has a 24-SSOP (0.
65mm)Surface Mount Package.
24−SSOP−BD209 FEATURES • • • • • • • Internal A/D converter for 4 level FSK (2-bit ADC) High transmission rate: 6400bps (Max.
) Operating voltage range: VCC1 = 1.
1 ~ 4.
0V Typical supply current: 1.
5mA at 1.
4V Low battery detection circuit (alarm function): 1.
05V Mixer operating frequency: 10 ~ 50MHz Package type: 24-SSOP (0.
65mm) ORDERING INFORMATION Device S1T8515A01-U0B0 Package 24−SSOP−BD209 Operating Temperature −20°C ~ +70°C 1 S1T8515A FM IF RECEIVER FOR FLEX PAGER BLOCK DIAGRAM MI 24 2nd MIX GND 23 REGO REGC 22 21 AO 20 FSKO1 FSKO2 19 18 BSC 17 QC1 16 QC2 FSKR2 15 14 RSSI 13 1.
0V Regulator Alarm FSK Comparator Quick Charge X-tal Osc.
1 OSCI 2 OSCO 3 MO 4 Vcc Limiting IF Amplifier 5 LI 6 LD 7 Quad Detector 8 QD 9 C1 Bit-rate Filter 10 C2 11 C3 12 FIL VAR FSKR1 PIN CONFIGURATION OSCI OSCO MO Vcc LI LD FSKR1 QD C1 1 2 3 4 5 6 7 8 9 24 MI 23 GND 22 REGO 21 REGC 20 AO S1T8515A 19 FSKO1 18 FSKO2 17 BSC 16 QC1 15 QC2 14 FSKR2 13 RSSI C2 10 C3 11 FIL VAR 12 2 FM IF RECEIVER FOR FLEX PAGER S1T8515A PIN DESCRIPTION Pin No 1 2 3 4 5 6 7 8 9 10 11 12 Symbol OSCI OSCO MO VCC LI LD FSKR1 QD C1 C2 C3 FIL VAR Description Oscillator input (Base).
The oscillator is an internally biased colpitts type.
Oscillator output (Emitter).
Mixer output (Output impedance ≈ 1.
5kΩ) Connect a 455kHz filter between this pin and the LI.
Power supply voltage.
IF limiter amplifier input (Input impedance ≈ 1.
5kΩ).
Bypass capacitor connect pin for the IF limiter amp.
Differential Amp Reference input on the FSK comparator.
Quadrature detection, phase shiftier input.
Capacitors for bit-rate filter.
Bit-rate filter ...


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