Fairchild MM74C905 Data Handbook
Summary
The MM74C905 is a high-performance CMOS 12-bit Successive Approximation Register (SAR) designed for robust analog-to-digital conversion. Featuring a wide operating voltage range and low power consumption, it offers precise data control for diverse digital systems while maintaining TTL compatibility. This comprehensive manual provides hardware developers with detailed electrical characteristics, absolute maximum ratings, critical timing parameters, and operational modes needed to seamlessly integrate this reliable ADC component into their electronic designs.
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74C 905 12-B it S ccessive A roxim atio eg ister
October 1987 Revised January 1999
MM74C905 12-Bit Successive Approximation Register General Description Features The MM74C905 CMOS 12-bit successive approximation Wide supply voltage range: 3.0V to 15V register contains all the digit control and storage necessary
Guaranteed noise margin: 1.0V
for successive approximation analog-to-digital conversion.
High noise immunity: 0.45 VCC (typ)
Because of the unique capability of CMOS to switch to
each supply rail without any offset voltage, it can also be Low power TTL compatibility: Fan out of 2 driving 74L
used in digital systems as the control and storage element Provision for register extension or truncation in repetitive routines.
Operates in START/STOP or continuous conversion mode Drive ladder switches directly. For 10 bits or less with 50k/100k R/2R ladder network
Ordering Code: Order Number Package Number Package Description MM74C905N N24A 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600” Wide
Connection Diagram
Pin Assignments for DIP
© 1999 Fairchild Semiconductor Corporation DS005910.prf www.fairchildsemi.com
Page Summary Contents For Fairchild MM74C905 Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 8 |
| File Size | 73.49 KB |
| Published | July 15, 2026 |
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Frequently Asked Questions
What voltage range can the MM74C905 operate within?
The device supports a wide supply voltage range from 3.0V to 15V.
How is a conversion cycle initiated on this SAR?
A conversion starts by holding the START input at V for at least one clock period, while ensuring all other outputs are at L and OUT(0) becomes complete.
What type of package does the MM74C905 use?
It utilizes a 24-Lead Plastic Dual-In-Line Package (PDIP).
Can I use this semiconductor in critical life support systems?
No; Fairchild requires express written approval for its use as a critical component in life support devices or systems.