Product Overview
Harris HCT4046A High-Speed CMOS Phase-Locked Loop with VCO, 16-Lead SOIC Surface Mount
Condition
Unused new old stock (NOS). Markings legible: Harris logo, HCT4046A. Sold each.
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Product Overview
A high-speed CMOS phase-locked loop with an on-chip voltage-controlled oscillator, made by Harris Semiconductor and orderable as the CD74HCT4046AM. It carries three phase comparators, runs on a 5 V supply with TTL-compatible inputs, and sits in a 16-lead SOIC body marked HCT4046A.
Key Features
- Orderable number CD74HCT4046AM; body marked HCT4046A with the Harris logo
- Phase-locked loop with on-chip voltage-controlled oscillator (VCO)
- Three phase comparators: PC1 exclusive-OR, PC2 edge-triggered phase/frequency detector, PC3 edge-triggered RS flip-flop detector
- VCO up to 18 MHz typical at VCC = 5 V
- Supply 4.5 V to 5.5 V with TTL-compatible HCT inputs
- Operating temperature -55 C to 125 C
- 16-lead SOIC, gull-wing surface mount
Applications
- Replacing a failed HCT4046A on a 5 V logic board that uses the SOIC footprint
- Building a frequency multiplier by placing a counter between the VCO output and a comparator input
- Locking a local clock to an incoming reference driven from TTL-level logic
Frequently Asked Questions
Will it take signals straight from TTL logic?
Yes. The HCT inputs are TTL-compatible, so 5 V TTL outputs drive it directly on a 4.5 V to 5.5 V supply.
Is this the surface-mount or the through-hole version?
Surface mount: a 16-lead SOIC with gull-wing leads. The through-hole form of the same device is the CD74HCT4046AE in a 16-lead DIP.
Three different ways to compare two signals and one oscillator to chase the answer, folded into a body smaller than a postage stamp. Pick the comparator that suits your loop.
