參數(shù)資料
型號： MC14559BCP
廠商： MOTOROLA INC
元件分類： 標準邏輯
英文描述： Successive Approximation Registers
中文描述： SPECIALTY LOGIC CIRCUIT, PDIP16
封裝： PLASTIC, DIP-16
文件頁數(shù)： 1/9頁
文件大?。?/td> 209K
代理商： MC14559BCP
MOTOROLA CMOS LOGIC DATA
Motorola, Inc. 1995
1
MC14549B MC14559B
The MC14549B and MC14559B successive approximation registers are
8–bit registers providing all the digital control and storage necessary for
successive approximation analog–to–digital conversion systems. These
parts differ in only one control input. The Master Reset (MR) on the
MC14549B is required in the cascaded mode when more than 8 bits are
desired. The Feed Forward (FF) of the MC14559B is used for register
shortening where End–of–Conversion (EOC) is required after less than eight
cycles.
Applications for the MC14549B and MC14559B include analog–to–digital
conversion, with serial and parallel outputs.
Totally Synchronous Operation
All Outputs Buffered
Single Supply Operation
Serial Output
Retriggerable
Compatible with a Variety of Digital and Analog Systems such as the
MC1408 8–Bit D/A Converter
All Control Inputs Positive–Edge Triggered
Supply Voltage Range = 3.0 Vdc to 18 Vdc
Capable of Driving Two Low–Power TTL Loads, One Low–Power
Schottky TTL Load or Two HTL Loads Over the Rated Temperature
Chip Complexity: 488 FETs or 122 Equivalent Gates
MAXIMUM RATINGS*
(Voltages referenced to VSS)
Rating
DC Supply Voltage
Symbol
VDD
Vin
Iin
PD
TA
Tstg
Value
Unit
Vdc
– 0.5 to + 18
Input Voltage, All Inputs
– 0.5 to VDD + 0.5
±
10
Vdc
DC Input Current, per Pin
mAdc
Power Dissipation, per Package
500
mW
Operating Temperature Range
– 55 to + 125
C
Storage Temperature Range
– 65 to + 150
C
* Maximum Ratings are those values beyond which damage to the device may occur.
Temperature Derating:
“P and D/DW” Packages: – 7.0 mW/C From 65 C To 125 C Ceramic
“L” Packages: – 12 mW/ C From 100 C To 125 C
TRUTH TABLES
MC14549B
SC SC(t–1) MR MR(t–1) Clock
X
X
X
X
X
1
1
0
0
Action
X
X
0
None
Reset
Start
Conversion
Start
Conversion
Continue
Conversion
Continue
Previous
Operation
1
X
0
1
1
1
0
0
0
X
0
X
X = Don’t Care
t–1 = State at Previous Clock
SC
SC(t–1) EOC Clock
X
0
Action
X
1
X
0
None
Start
Conversion
Continue
Conversion
Continue
Conversion
Retain
Conversion
Result
Start
Conversion
X
1
0
0
0
0
0
X
1
1
X
1
MC14559B
SEMICONDUCTOR TECHNICAL DATA
REV 3
1/94
L SUFFIX
CERAMIC
CASE 620
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBDW
TA = – 55
°
to 125
°
C for all packages.
Plastic
Ceramic
SOIC
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
PIN ASSIGNMENT
13
14
15
16
9
10
11
12
5
4
3
2
1
8
7
6
Q0
Q1
Q2
Q3
VDD
SC
*
EOC
Q7
Q6
Q5
Q4
VSS
C
D
Sout
* For MC14549B Pin 10 is MR input.
For MC14559B Pin 10 is FF input.
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