schs204j is a high-speed silicon-gate cmos device with excellent vco frequency linearity and minimal frequency drift, suitable for fm modulation and demodulation, frequency synthesis and multiplication, frequency discrimination, tone decoding, data synchronization and conditioning, voltage-to-frequency conversion and motor speed control.
The CD4046A family (including CD54HC4046A, CD74HC4046A, CD54HCT4046A and CD74HCT4046A) is a high‑speed CMOS phase‑locked‑loop with a linear voltage‑controlled oscillator. It offers three selectable phase comparators, VCO‑inhibit control, low standby power and a wide operating temperature range.
The document provides detailed functional diagrams, pin descriptions, absolute maximum ratings, electrical specifications for both HC and HCT versions, mechanical package data and ordering part numbers. It also includes application notes such as FM modulation, frequency synthesis and motor‑speed control.
| Operating Frequency Range | Up to 18 MHz typ (V OC = 5 V), minimum center 12 MHz (V OC = 4.5 V) |
|---|---|
| Supply Voltage – HC Types | 2 V to 6 V |
| Supply Voltage – HCT Types | 4.5 V to 5.5 V |
| Operating Temperature Range | -55 °C to 125 °C |
| Standard Output Fanout | 10 LSTTL loads |
| Bus Driver Output Fanout | 15 LSTTL loads |
| Package Types | 16‑lead CERDIP, PDIP, SOIC, SOP, TSSOP |
| Pin Count | 16 pins |
The device operates up to 18 MHz typical at V OC = 5 V, with a minimum center frequency of 12 MHz at V OC = 4.5 V.
HC versions work from 2 V to 6 V, while HCT versions work from 4.5 V to 5.5 V.
The device is specified for operation from –55 °C to 125 °C.
Standard outputs can drive up to 10 LSTTL loads, and bus driver outputs up to 15 LSTTL loads.