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MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Successive Approximation Registers
The MC14549B and MC14559B successive approximation registers are 8­bit registers providing all the digital control and storage necessary for successive approximation analog­to­digital 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 End­of­Conversion (EOC) is required after less than eight cycles. Applications for the MC14549B and MC14559B include analog­to­digital 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 8­Bit D/A Converter · All Control Inputs Positive­Edge Triggered · Supply Voltage Range = 3.0 Vdc to 18 Vdc · Capable of Driving Two Low­Power TTL Loads, One Low­Power Schottky TTL Load or Two HTL Loads Over the Rated Temperature Range · Chip Complexity: 488 FETs or 122 Equivalent Gates MAXIMUM RATINGS* (Voltages referenced to VSS)
Rating Symbol VDD Vin Iin PD TA Tstg DC Supply Voltage Value Unit Vdc Vdc mAdc mW

MC14549B MC14559B
L SUFFIX CERAMIC CASE 620

P SUFFIX PLASTIC CASE 648

DW SUFFIX SOIC CASE 751G

ORDERING INFORMATION
MC14XXXBCP MC14XXXBCL MC14XXXBDW Plastic Ceramic SOIC

TA = ­ 55° to 125°C for all packages.

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
­ 0.5 to + 18 ± 10 500 ­ 55 to + 125 ­ 65 to + 150 Input Voltage, All Inputs DC Input Current, per Pin Power Dissipation, per Package Operating Temperature Range Storage Temperature Range ­ 0.5 to VDD + 0.5

PIN ASSIGNMENT
Q4 Q5 Q6 Q7 Sout D C VSS 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VDD Q3 Q2 Q1 Q0 EOC * SC

_C _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

* For MC14549B Pin 10 is MR input. For MC14559B Pin 10 is FF input.

MC14549B

TRUTH TABLES

MC14559B

SC SC(t­1) MR MR(t­1) Clock Action X X X X None X X 1 X Reset 1 0 0 0 Start Conversion 1 X 0 1 Start Conversion 1 1 0 0 Continue Conversion 0 X 0 X Continue Previous Operation X = Don't Care t­1 = State at Previous Clock
REV 3 1/94

SC SC(t­1) EOC Clock Action X X X None 1 0 0 Start Conversion X 1 0 Continue Conversion 0 0 0 Continue Conversion 0 X 1 Retain Conversion Result 1 X 1 Start Conversion

©MOTOROLA CMOS LOGIC DATA Motorola, Inc. 1995

MC14549B MC14559B 1

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ELECTRICAL CHARACTERISTICS (Voltages Referenced to VSS)
Characteristic Symbol VOL VDD Vdc 5.0 10 15 5.0 10 15 5.0 10 15 VIH 5.0 10 15 IOH Source 5.0 5.0 10 15 IOL 5.0 10 15 5.0 10 15 Iin Cin IDD 15 -- 5.0 10 15 ­ 1.2 ­ 0.25 ­ 0.62 ­ 1.8 1.28 3.2 8.4 0.64 1.6 4.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ± 0.1 -- 5.0 10 20 ­ 1.0 ­ 0.2 ­ 0.5 ­ 1.5 1.02 2.6 6.8 0.51 1.3 3.4 -- -- -- -- -- ­ 1.7 ­ 0.36 ­ 0.9 ­ 3.5 1.76 4.5 17.6 0.88 2.25 8.8 ± 0.00001 5.0 0.005 0.010 0.015 -- -- -- -- -- -- -- -- -- -- ± 0.1 7.5 5.0 10 20 ­ 0.7 ­ 0.14 ­ 0.35 ­ 1.1 0.72 1.8 4.8 0.36 0.9 2.4 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ± 1.0 -- 150 300 600 mAdc 3.5 7.0 11 -- -- -- 3.5 7.0 11 2.75 5.50 8.25 -- -- -- 3.5 7.0 11 -- -- -- mAdc Min -- -- -- ­ 55_C 25_C 125_C Max Min -- -- -- Typ # 0 0 0 Max Min -- -- -- Max Unit Vdc Output Voltage Vin = VDD or 0 "0" Level 0.05 0.05 0.05 -- -- -- 1.5 3.0 4.0 0.05 0.05 0.05 -- -- -- 1.5 3.0 4.0 0.05 0.05 0.05 -- -- -- 1.5 3.0 4.0 Vdc "1" Level Vin = 0 or VDD Input Voltage # "0" Level (VO = 4.5 or 0.5 Vdc) (VO = 9.0 or 1.0 Vdc) (VO = 13.5 or 1.5 Vdc) "1" Level (VO = 0.5 or 4.5 Vdc) (VO = 1.0 or 9.0 Vdc) (VO = 1.5 or 13.5 Vdc) Output Drive Current (VOH = 2.5 Vdc) (VOH = 4.6 Vdc) (VOH = 9.5 Vdc) (VOH = 13.5 Vdc) (VOL = 0.4 Vdc) (VOL = 0.5 Vdc) (VOL = 1.5 Vdc) (VOL = 0.4 Vdc) (VOL = 0.5 Vdc) (VOL = 1.5 Vdc) Input Current Input Capacitance Quiescent Current (Per Package) (Clock = 0 V, Other Inputs = VDD or 0 V, Iout = 0 µA) Total Supply Current** (Dynamic plus Quiescent, Per Package) (CL = 50 pF on all outputs, all buffers switching) VIL -- -- -- -- -- -- 2.25 4.50 6.75 -- -- -- VOH 4.95 9.95 14.95 4.95 9.95 14.95 5.0 10 15 4.95 9.95 14.95 Vdc Vdc Sink Q Outputs Sink Pin 5, 11 only mAdc µAdc pF µAdc IT 5.0 10 15 IT = (0.8 µA/kHz) f + IDD IT = (1.6 µA/kHz) f + IDD IT = (2.4 µA/kHz) f + IDD µAdc #Noise immunity specified for worst­case input combination. Noise Margin for both "1" and "0" level = 1.0 V min @ VDD = 5.0 V = 2.0 V min @ VDD = 10 V = 2.5 V min @ VDD = 15 V To calculate total supply current at loads other than 50 pF: IT(CL) = IT(50 pF) + 3.5 x 10­3 (CL = 50) VDDf where: IT is in µA (per package), CL in pF, VDD in V, and f in kHz is input frequency. ** The formulas given are for the typical characteristics only at 25_C. This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation it is recommended that Vin and Vout be constrained to the range VSS (Vin or Vout) VDD. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD).

v

v

MC14549B MC14559B 2

MOTOROLA CMOS LOGIC DATA

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
SWITCHING CHARACTERISTICS* (CL = 50 pF, TA = 25_C)
Characteristic Output Rise Time tTLH = (3.0 ns/pF) CL + 30 ns tTLH = (1.5 ns/pF) CL + 15 ns tTLH = (1.1 ns/pF) CL + 10 ns Symbol tTLH VDD 5.0 10 15 5.0 10 15 tPLH, tPHL 5.0 10 15 5.0 10 15 5.0 10 15 tsu 5.0 10 15 5.0 10 15 5.0 10 15 5.0 10 15 5.0 10 15 -- -- -- -- -- -- -- -- 250 100 80 700 270 200 500 200 160 -- -- -- -- -- -- 500 210 155 750 310 220 300 130 100 125 50 40 350 135 100 250 100 80 1000 420 310 1500 620 440 600 260 200 -- -- -- -- -- -- -- -- -- 15 1.0 0.5 0.8 1.5 2.0 ns Min -- -- -- -- -- -- Typ 180 90 65 100 50 40 Max 360 180 130 200 100 80 ns Unit ns Output Fall Time tTHL = (1.5 ns/pF) CL + 25 ns tTHL = (0.75 ns/pF) CL + 12.5 ns tTHL = (0.55 ns/pF) CL + 9.5 ns Propagation Delay Time Clock to Q tPLH, tPHL = (1.7 ns/pF) CL + 415 ns tPLH, tPHL = (0.66 ns/pF) CL + 177 ns tPLH, tPHL = (0.5 ns/pF) CL + 130 ns Clock to Sout tPLH, tPHL = (1.7 ns/pF) CL + 665 ns tPLH, tPHL = (0.66 ns/pF) CL + 277 ns tPLH, tPHL = (0.5 ns/pF) CL + 195 ns Clock to EOC tPLH, tPHL = (1.7 ns/pF) CL + 215 ns tPLH, tPHL = (0.66 ns/pF) CL + 97 ns tPLH, tPHL = (0.5 ns/pF) CL + 75 ns SC, D, FF or MR Setup Time tTHL ns Clock Pulse Width tWH(cl) ns Pulse Width -- D, SC, FF or MR tWH ns Clock Rise and Fall Time tTLH, tTHL fcl µs -- 1.5 3.0 4.0 Clock Pulse Frequency MHz * The formulas given are for the typical characteristics only.

MOTOROLA CMOS LOGIC DATA

MC14549B MC14559B 3

SWITCHING TIME TEST CIRCUIT AND WAVEFORMS
VDD

Q7 C SC FF(MR) D Q6 Q5 Q4 Q3 Q2 Q1 Q0 EOC Sout CL VSS C SC D 50% tsu 50% tsu 50% tPLH Q7 Sout NOTE: Pin 10 = VSS 50% tTLH 90% tsu tPHL 10% tTHL 50% tPLH 90% 10% tTLH tWH(D) CL 1 fcl CL CL CL CL CL CL CL CL

PROGRAMMABLE PULSE GENERATOR

tWH(cl)

TIMING DIAGRAM
CLOCK

Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0

EOC Sout

MC14549B MC14559B 4

ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ ÉÉÉ
SC D

INH Q7 Q6 INH Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Q8* INH -- Don't care condition

INH -- Indicates Serial Out is inhibited low. * -- Q8 is ninth­bit of serial information available from 8­bit register. NOTE: Pin 10 = VSS

MOTOROLA CMOS LOGIC DATA

OPERATING CHARACTERISTICS
Both the MC14549B and MC14559B can be operated in either the "free run" or "strobed operation" mode for conversion schemes with any number of bits. Reliable cascading and/or recirculating operation can be achieved if the End of Convert (EOC) output is used as the controlling function, since with EOC = 0 (and with SC = 1 for MC14549B but either 1 or 0 for MC14559B) no stable state exists under continual clocked operation. The MC14559B will automatically recirculate after EOC = 1 during externally strobed operation, provided SC = 1. All data and control inputs for these devices are triggered into the circuit on the positive edge of the clock pulse. Operation of the various terminals is as follows: C = Clock -- A positive­going transition of the Clock is required for data on any input to be strobed into the circuit. SC = Start Convert -- A conversion sequence is initiated on the positive­going transition of the SC input on succeeding clock cycles. D = Data in -- Data on this input (usually from a comparator in A/D applications) is also entered into the circuit on a positive­going transition of the clock. This input is Schmitt triggered and synchronized to allow fast response and guaranteed quality of serial and parallel data. MR = Master Reset (MC14549B Only) -- Resets all output to 0 on positive­going transitions of the clock. If removed while SC = 0, the circuit will remain reset until SC = 1. This allows easy cascading of circuits. FF = Feed Forward (MC14559B Only) -- Provides register shortening by removing unwanted bits from a system. For operation with less than 8 bits, tie the output following the least significant bit of the circuit to EOC. E.g., for a 6­bit conversion, tie Q1 to FF; the part will respond as shown in the timing diagram less two bit times. Not that Q1 and Q0 will still operate and must be disregarded. For 8­bit operation, FF is tied to VSS. For applications with more than 8 but less than 16 bits, use the basic connections shown in Figure 1. The FF input of the MC14559B is used to shorten the setup. Tying FF directly to the least significant bit used in the MC14559B allows EOC to provide the cascading signal, and results in smooth transition of serial information from the MC14559B to the MC14549B. The Serial Out (S out) inhibit structure of the MC14559B remains inactive one cycle after EOC goes high, while Sout of the MC14549B remains inhibited until the second clock cycle of its operation. Qn = Data Outputs -- After a conversion is initiated the Q's on succeeding cycles go high and are then conditionally reset dependent upon the state of the D input. Once conditionally reset they remain in the proper state until the circuit is either reset or reinitiated. EOC = End of Convert -- This output goes high on the negative­going transition of the clock following FF = 1 (for the MC14559B) or the conditional reset of Q0. This allows settling of the digital circuitry prior to the End of Conversion indication. Therefore either level or edge triggering can indicate complete conversion. Sout = Serial Out -- Transmits conversion in serial fashion. Serial data occurs during the clock period when the corresponding parallel data bit is conditionally reset. Serial Out is inhibited on the initial period of a cycle, when the circuit is reset, and on the second cycle after EOC goes high. This provides efficient operation when cascaded.

FROM A/D COMPARATOR

EXTERNAL CLOCK

1/4 MC14001 SERIAL OUT (CONTINUAL UPDATE EVERY 13 CLOCK CYCLES)

D C SC

Sout

D C SC MC14549B

Sout

MC14559B * FF Q7 Q6 Q5 Q4 ·· Q0 EOC ** MSB NC TO D/A AND PARALLEL DATA

MR Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 EOC

{
LSB TO D/A AND PARALLEL DATA FREE RUN MODE

EXTERNAL STROBE * FF allows EOC to activate as if in 4­stage register. ** Cascading using EOC guaranteed; no stable unfunctional state. Completion of conversion automatically re­initiates cycle in free run mode.

Figure 1. 12­Bit Conversion Scheme

MOTOROLA CMOS LOGIC DATA

MC14549B MC14559B 5

TYPICAL APPLICATIONS
Externally Controlled 6­Bit ADC (Figure 2) Several features are shown in this application: · Shortening of the register to six bits by feeding the seventh output bit into the FF input. · Continuous conversion, if a continuous signal is applied to SC. · Externally controlled updating (the start pulse must be shorter than the conversion cycle). · The EOC output indicating that the parallel data are valid and that the serial output is complete. Continuously Cycling 8­Bit ADC (Figure 3) This ADC is running continuously because the EOC signal is fed back to the SC input, immediately initiating a new cycle on the next clock pulse. Continuously Cycling 12­Bit ADC (Figure 4) Because each successive approximation register (SAR) has a capability of handling only an eight­bit word, two must be cascaded to make an ADC with more than eight bits. When it is necessary to cascade two SAR's, the second SAR must have a stable resettable state to remain in while awaiting a subsequent start signal. However, the first stage must not have a stable resettable state while recycling, because during switch­on or due to outside influences, the first stage has entered a reset state, the entire ADC will remain in a stable non­functional condition. This 12­bit ADC is continuously recycling. The serial as well as the parallel outputs are updated every thirteenth clock pulse. The EOC pulse indicates the completion of

C SC MC14559B Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Sout FF EOC

TO DAC

Figure 2. Externally Controlled 6­Bit ADC

C SC MC14559B Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Sout FF EOC

TO DAC

Figure 3. Continuously Cycling 8­Bit ADC

MC14549B MC14559B 6

MOTOROLA CMOS LOGIC DATA

Sout SC C MC14559B Sout Sout MC14549B MR Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 EOC SC C

Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 FF EOC

TO DAC

TO DAC

EOC

Figure 4. Continuously Cycling 12­Bit ADC

the 12­bit conversion cycle, the end of the serial output word, and the validity of the parallel data output. Externally Controlled 12­Bit ADC (Figure 5) In this circuit the external pulse starts the first SAR and simultaneously resets the cascaded second SAR. When Q4 of the first SAR goes high, the second SAR starts conversion, and the first one stops conversion. EOC indicates that the parallel data are valid and that the serial output is complete. Updating the output data is started with every external control pulse.

Additional Motorola Parts for Successive Approximation ADC Monolithic digital­to­analog converters -- The MC1408/1508 converter has eight­bit resolution and is available with 6, 7, and 8­bit accuracy. The amplifier­comparator block -- The MC1407/1507 contains a high speed operational amplifier and a high speed comparator with adjustable window. With these two linear parts it is possible to construct SA­ ADCs with an accuracy of up to eight bits, using as the register one MC14549B or one MC14559B. An additional CMOS block will be necessary to generate the clock frequency. Additional information on successive approximation ADC is found in Motorola Application Note AN­716.

SC

C MC14559B

Sout

Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 FF EOC

Sout MC14549B MR Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 EOC SC

C

TO DAC

TO DAC EOC Sout

Figure 5. Externally Controlled 12­Bit ADC

MOTOROLA CMOS LOGIC DATA

MC14549B MC14559B 7

OUTLINE DIMENSIONS
L SUFFIX CERAMIC DIP PACKAGE CASE 620­10 ISSUE V
­A­
16 9 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION F MAY NARROW TO 0.76 (0.030) WHERE THE LEAD ENTERS THE CERAMIC BODY. DIM A B C D E F G H K L M N INCHES MIN MAX 0.750 0.785 0.240 0.295 ­­­ 0.200 0.015 0.020 0.050 BSC 0.055 0.065 0.100 BSC 0.008 0.015 0.125 0.170 0.300 BSC 0_ 15 _ 0.020 0.040 MILLIMETERS MIN MAX 19.05 19.93 6.10 7.49 ­­­ 5.08 0.39 0.50 1.27 BSC 1.40 1.65 2.54 BSC 0.21 0.38 3.18 4.31 7.62 BSC 0_ 15 _ 0.51 1.01

­B­
1 8

C

L

­T­
SEATING PLANE

N E F D G
16 PL

K M J
16 PL

0.25 (0.010)
M

M

T B

S

0.25 (0.010)

T A

S

P SUFFIX PLASTIC DIP PACKAGE CASE 648­08 ISSUE R
­A­
16 9 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. DIM A B C D F G H J K L M S INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01

B
1 8

F S

C

L

­T­ H G D
16 PL

SEATING PLANE

K

J T A
M

M

0.25 (0.010)

M

MC14549B MC14559B 8

MOTOROLA CMOS LOGIC DATA

OUTLINE DIMENSIONS
DW SUFFIX PLASTIC SOIC PACKAGE CASE 751G­02 ISSUE A
­A­
16 9 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS MIN MAX 10.15 10.45 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0_ 7_ 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.400 0.411 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0_ 7_ 0.395 0.415 0.010 0.029

­B­
1 8

8X

P 0.010 (0.25)
M

B

M

16X

D
M

J T A
S

0.010 (0.25)

B

S

F R X 45 _ C ­T­
14X DIM A B C D F G J K M P R

G

K

SEATING PLANE

M

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MOTOROLA CMOS LOGIC DATA

*MC14549B/D*

MC14549B MC14559B MC14549B/D 9