S1T8513A

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...