MM74C905N

MM74C905N Datasheet

MM74C905 12-Bit Successive Approximation Register

Part	Datasheet
MM74C905N	MM74C905N (pdf)

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MM74C905 12-Bit Successive Approximation Register MM74C905 12-Bit Successive Approximation Register The MM74C905 CMOS 12-bit successive approximation register contains all the digit control and storage necessary for successive approximation analog-to-digital conversion. Because of the unique capability of CMOS to switch to each supply rail without any offset voltage, it can also be used in digital systems as the control and storage element in repetitive routines. s Wide supply voltage range 3.0V to 15V s Guaranteed noise margin 1.0V s High noise immunity VCC typ s Low power TTL compatibility Fan out of 2 driving 74L s Provision for register extension or truncation s Operates in START/STOP or continuous conversion mode s 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-011, Wide Connection Diagram Pin Assignments for DIP 2003 Fairchild Semiconductor Corporation DS005910 MM74C905 Truth Table Time Inputs Outputs D S E D0 Q11 Q10 Q9 Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 CC X LL X 1 D11 H L X 2 D10 H L D11 L 3 D9 H L D10 D11 D10 L H 4 D8 H L D9 D11 D10 D9 L H 5 D7 H L D8 D11 D10 D9 D8 L H 6 D6 H L D7 D11 D10 D9 D8 D7 L H 7 D5 H L D6 D11 D10 D9 D8 D7 D6 L H 8 D4 H L D5 D11 D10 D9 D8 D7 D6 D5 L H 9 D3 H L D4 D11 D10 D9 D8 D7 D6 D5 D4 L H 10 D2 H L D3 D11 D10 D9 D8 D7 D6 D5 D4 D3 L H 11 D1 H L D2 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 L H 12 D0 H L D1 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 L H X H L D0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 L X L X D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 L X XH X H = HIGH Level L = LOW Level X = Don’t Care NC = No Change MM74C905 Absolute Maximum Ratings Note 1 Voltage at Any Pin Operating Temperature Range TA Storage Temperature Range TS Power Dissipation PD Dual-In-Line Small Outline Operating VCC Range Absolute Maximum VCC Lead Temperature TL Soldering, 10 seconds −0.3V to VCC+0.3V −40°C to +85°C −65°C to +150°C

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MM74C905 12-Bit Successive Approximation Register

MM74C905 12-Bit Successive Approximation Register

The MM74C905 CMOS 12-bit successive approximation register contains all the digit control and storage necessary for successive approximation analog-to-digital conversion. Because of the unique capability of CMOS to switch to each supply rail without any offset voltage, it can also be used in digital systems as the control and storage element in repetitive routines.
s Wide supply voltage range 3.0V to 15V s Guaranteed noise margin 1.0V s High noise immunity VCC typ s Low power TTL compatibility Fan out of 2 driving 74L s Provision for register extension or truncation s Operates in START/STOP or continuous conversion
mode s 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-011, Wide

Connection Diagram

Pin Assignments for DIP
2003 Fairchild Semiconductor Corporation DS005910

MM74C905

Truth Table

Time

Inputs

Outputs

D S E D0 Q11 Q10 Q9 Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 CC

X LL X
1 D11 H L X
2 D10 H L D11 L
3 D9 H L D10 D11 D10 L H
4 D8 H L D9 D11 D10 D9 L H
5 D7 H L D8 D11 D10 D9 D8 L H
6 D6 H L D7 D11 D10 D9 D8 D7 L H
7 D5 H L D6 D11 D10 D9 D8 D7 D6 L H
8 D4 H L D5 D11 D10 D9 D8 D7 D6 D5 L H
9 D3 H L D4 D11 D10 D9 D8 D7 D6 D5 D4 L H
10 D2 H L D3 D11 D10 D9 D8 D7 D6 D5 D4 D3 L H
11 D1 H L D2 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 L H
12 D0 H L D1 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 L H

X H L D0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 L

X L X D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 L

X XH X

H = HIGH Level L = LOW Level X = Don’t Care NC = No Change

MM74C905

Absolute Maximum Ratings Note 1

Voltage at Any Pin

Operating Temperature Range TA Storage Temperature Range TS Power Dissipation PD

Dual-In-Line

Small Outline Operating VCC Range Absolute Maximum VCC Lead Temperature TL

Soldering, 10 seconds
−0.3V to VCC+0.3V −40°C to +85°C
−65°C to +150°C

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Datasheet ID: MM74C905N 634361