Datasheet MC3479P Datasheet (Motorola)

Page 1

  

The MC3479 is designed to drive a two–phase stepper motor in the bipolar mode. The circuit consists of four input sections, a logic decoding/sequencing section, two driver–stages for the motor coils, and an output to indicate the Phase A

• Single Supply Operation: 7.2 to 16.5 V

• 350 mA/Coil Drive Capability

• Clamp Diodes Provided for Back–EMF Suppression

• Selectable CW/CCW and Full/Half Step Operation

• Selectable High/Low Output Impedance (Half Step Mode)

• TTL/CMOS Compatible Inputs

• Input Hysteresis: 400 mV Minimum

• Phase Logic Can Be Initialized to Phase A

• Phase A Output Drive State Indication (Open–Collector)

• Available in Standard DIP and Surface Mount

drive state.

Order this document by MC3479/D



STEPPER MOTOR

DRIVER

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

CASE 648C

Figure 1. Representative Block Diagram

Clock

CW/CCW

/H Step

OIC

Logic

/SetPhase A

Driver

GndBias

Full Step

Clk

/CCW

/Half

OIC

ORDERING INFORMATION

Operating

Device

MC3479P TA = 0° to +70°C Plastic

Temperature Range

Package

PIN CONNECTIONS

11 12 13 Full/Half Step

Phase A

CW/CCW

16 15 14 13 12 11 10

V L3 L4

Phase A CW/CCW Ful

Step

17 16 15 148

Gnd

l/Half

L4 Gnd Gnd Gnd Gnd

L2 V

Gnd

5 6

Bias

/Set

Clk

7 8

OIC

(Top View)

21519

418

Gnd Gnd

Gnd

Bias/Set

9 Clk

OIC

INPUT TRUTH TABLE

Input Low Input High

/CCW /Half Step

Full OIC

CW CCW

Full Step Half Step

Hi Z Low Z

Positive Edge TriggeredClk

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 1

Page 2

MC3479

MAXIMUM RATINGS

Rating Symbol Value Unit

Supply Voltage V Clamp Diode Cathode Voltage (Pin 1) V Driver Output Voltage V Drive Output Current/Coil I Input Voltage (Logic Controls) V Bias/Set Current I Phase A Output Voltage V Phase A Sink Current I Junction Temperature T Storage Temperature Range T

M D

stg

RECOMMENDED OPERATING CONDITIONS

Characteristic Symbol Min Max Unit

Supply Voltage V Clamp Diode Cathode Voltage V Driver Output Current (Per Coil) (Note 1) I Input Voltage (Logic Controls) V Bias/Set Current (Outputs Active) I Phase A Output Voltage V Phase A Sink Current I Operating Ambient Temperature T

NOTE: 1. See section on Power Dissipation in Application Information.

+ 18 Vdc VM + 5.0 Vdc VM + 6.0 Vdc

± 500 mA

– 0.5 to + 7.0 Vdc

– 10 mA

+ 18 Vdc

20 mA

+ 150 °C

– 65 to + 150 °C

M D

+ 7.2 + 16.5 Vdc

VM + 4.5 Vdc

— 350 mA

0 + 5.5 Vdc

– 300 – 75 µA

— V

Vdc

0 8.0 mA

0 + 70 °C

DC ELECTRICAL CHARACTERISTICS (Specifications apply over the recommended supply voltage and temperature range, [Notes

2, 3] unless otherwise noted.)

Characteristic

INPUT LOGIC LEVELS

Threshold Voltage (Low–to–High) Threshold Voltage (High–to–Low) Hysteresis V Current: (VI = 0.4 V)

Current: (VI = 5.5 V) Current: (VI = 2.7 V)

DRIVER OUTPUT LEVELS

Output High Voltage 2, 3, V

(IBS = – 300 µA): (IOD = – 350 mA)

(IBS = – 300 µA): (IOD = – 0.1 mA)

Output Low Voltage V

(IBS = – 300 µA, IOD = 350 mA)

Differential Mode Output Voltage Difference (Note 4) DV

(IBS = – 300 µA, IOD = 350 mA)

Common Mode Output Voltage Dif ference (Note 5) CV

(IBS = – 300 µA, IOD = – 0.1 mA)

Output Leakage, Hi Z State µA

(0 p VOD p VM, IBS = – 5.0 µA) I (0 p VOD p VM, IBS = – 300 µA, F/H = 2.0 V, OIC = 0.8 V) I

NOTES: 2. Algebraic convention rather than absolute values is used to designate limit values.

3.Current into a pin is designated as positive. Current out of a pin is designated as negative.

4.DVOD = V

5.CVOD = V

OD1,2 OHD1

– V

OD3,4 OHD2

 where: V

 or V

OHD3

OD1,2

OD3,4

– V

= (V

OHD4

OHD1

= (V

.

– V

OHD3

OLD2

– V

) or (V

OLD4

Pins Symbol Min Typ Max Unit

7, 8,

9, 10

V V

TLH THL

HYS

— — 2.0 Vdc

0.8 — — Vdc

0.4 — — Vdc

–100

— —

+100

—

+20

OHD

14, 15 VM – 2.0

VM – 1.2——

— — 0.8 Vdc

— — 0.15 Vdc

– 100 — + 100 – 100 — + 100

OHD2

) or (V

– V

OHD4

OLD1

– V

), and

OLD3

OLD

OZ1 OZ2

—

µA

Vdc — —

MOTOROLA ANALOG IC DEVICE DATA

Page 3

MC3479

DC ELECTRICAL CHARACTERISTICS (Specifications apply over the recommended supply voltage and temperature range, [Notes

2, 3] unless otherwise noted.)

Characteristic

CLAMP DIODES

Forward Voltage 1, 2, 3, V

(ID = 350 mA) 14, 15

Leakage Current (Per Diode) I

(Pin 1 = 21 V; Outputs = 0 V; IBS = 0 µA)

PHASE A OUTPUT

Output Low Voltage 11 V

(IOA = 8.0 mA)

Off State Leakage Current I

= 16.5 V)

OHA

POWER SUPPLY

Power Supply Current 16 mA

(IOD = 0 µA, IBS = – 300 µA) (L1 = V (L1 = V (L1 = V

BIAS/SET CURRENT

To Set Phase A 6 I

OHD OHD OHD

, L2 = V , L2 = V , L2 = V

, L3 = V

OLD

, L3 = Hi Z, L4 = Hi Z) I

OLD

, L3 = V

OLD

OHD

, L4 = V

) I

OLD

) I

OHD

Pins Symbol Min Typ Max Unit

OLA

OHA

— 2.5 3.0 Vdc

— — 100 µA

— — 0.4 Vdc

— — 100 µA

— — 70 — — 40 — — 75

– 5.0 — — µA

PACKAGE THERMAL CHARACTERISTICS

Characteristic Symbol Min Typ Max Unit

Thermal Resistance, Junction–to–Ambient (No Heatsink) R

AC SWITCHING CHARACTERISTICS (T

Characteristic

Clock Frequency 7 f Clock Pulse Width (High) 7 PW Clock Pulse Width (Low) 7 PW Bias/Set Pulse Width 6 PW Setup Time (CW/CCW and F/HS) 10–7

Hold Time (CW/CCW and F/HS) 10–7

Propagation Delay (Clk–to–Driver Output) t Propagation Delay (Bias/Set–to–Driver Output) t Propagation Delay (Clk–to–Phase A Low) 7–11 t Propagation Delay (Clk–to–Phase A High) 7–11 t

NOTES: 2. Algebraic convention rather than absolute values is used to designate limit values.

3.Current into a pin is designated as positive. Current out of a pin is designated as negative.

= + 25°C, VM = 12 V) (See Figures 2, 3, 4)

Pins Symbol Min Typ Max Unit

9–7

θJA

CKH

CKL

PCD

PBSD

PHLA PLHA

— 45 — °C/W

0 — 50 kHz 10 — — µs 10 — — µs 10 — — µs

5.0 — — µs

10 — — µs

— 8.0 — µs — 1.0 — µs — 12 — µs — 5.0 — µs

MOTOROLA ANALOG IC DEVICE DATA

Page 4

MC3479

Bias

F / HS

/ CCW

Figure 2. AC Test Circuit

+ 12 V

/Set

Clk

OIC

56 k

MC3479P

7 8

9 10

41213

0.1

1.0 k

4.0 k

+ 12 V

Phase A

Bias/Set Input

L1 – L4 Outputs

Figure 3. Bias/Set Timing

(Refer to Figure 2)

VM – 1.0 VM – 1.0

PBSD

(High Impedance)

Note: tr, tf (10% to 90%) for input signals are

25 ns.

PBSD

PIN FUNCTION DESCRIPTION

Pin No.

20–Pin 16–Pin

20 16 Power Supply V

4, 5, 6, 7,

14, 15, 16, 17

4, 5,

12, 13

1 1 Clamp Diode

2, 3,

18, 19

2, 3,

14, 15

8 6 Bias/Set B/S This pin is typically 0.7 volts below VM. The current out of this pin

9 7 Clock Clk The positive edge of the clock input switches the outputs to the next

11 9 Full/Half Step F/HS When low (Logic “0”), each clock input pulse will cause the motor to

12 10 Clockwise/

10 8 Output Impedance

13 11 Phase A Ph A This open–collector output indicates (when low) that the driver outputs

Function Symbol Description

Power supply pin for both the logic circuit and the motor coil current. Voltage range is + 7.2 to + 16.5 volts.

Ground Gnd Ground pins for the logic circuit and the motor coil current. The

physical configuration of the pins aids in dissipating heat from within the IC package.

Voltage

This pin is used to protect the outputs where large voltage spikes may occur as the motor coils are switched. Typically a diode is connected between this pin and Pin 16. See Figure 11.

Driver Outputs L1, L2

L3, L4

High current outputs for the motor coils. L1 and L2 are connected to one coil, and L3 and L4 to the other coil.

(through a resistor to ground) determines the maximum output sink current. If the pin is opened (IBS < 5.0 µA) the outputs assume a high impedance condition, while the internal logic presets to a Phase A condition.

position. This input has no effect if Pin 6 is open.

rotate one full step. When high, each clock pulse will cause the motor to rotate one–half step. See Figure 7 for sequence.

CW/CCW This input allows reversing the rotation of the motor. See Figure 7 for

Counterclockwise

sequence.

OIC This input is relevant only in the half step mode (Pin 9 > 2.0 V). When

Control

low (Logic “0”), the two driver outputs of the non–energized coil will be in a high impedance condition. When high the same driver outputs will be at a low impedance referenced to VM. See Figure 7.

are in the Phase A

condition (L1 = L3 = V

, L2 = L4 = V

OHD

OLD

APPLICATION INFORMATION

General

The MC3479 integrated circuit is designed to drive a stepper positioning motor in applications such as disk drives and robotics. The outputs can provide up to 350 mA to each of two coils of a two–phase motor. The outputs change state with each low–to–high transition of the clock input, with the new output state depending on the previous state, as well as the input conditions at the logic controls.

Outputs

The outputs (L1–L4) are high current outputs (see Figure 5), which when connected to a two–phase motor, provide two full–bridge configurations (L3 and L4 are not shown in Figure 5). The polarities applied to the motor coils depend on which transistor (QH or QL) of each output is on, which in turn depends on the inputs and the decoding circuitry.

MOTOROLA ANALOG IC DEVICE DATA

Page 5

MC3479

Figure 4. Clock Timing

(Refer to Figure 2)

Clk

/HS,

/CCW

CW Inputs

Phase A Output

3.0 V 0

L1 – L4 Outputs

3.0 V

1.5 V

PCD

′

CLKH

6.0 V

CLKL

tht

1.5 V

PHLA

1.5 V

Figure 5. Output Stages

PLHA

Motor Coil

Note: tr, tf (10% to 90%) for input

signals are

10 ns.

Current Drivers

and

Logic

To L3, L4

Transistors

/ CCW

The maximum sink current available at the outputs is a function of the resistor connected between Pin 6 and ground (see section on Bias

/Set operation). Whenever the outputs are to be in a high impedance state, both transistors (QH and QL of Figure 5) of each output are off.

This pin allows for provision of a current path for the motor coil current during switching, in order to suppress back–EMF voltage spikes. VD is normally connected to VM (Pin 16) through a diode (zener or regular), a resistor, or directly. The peaks instantaneous voltage at the outputs must not exceed VM by more than 6.0 V. The voltage drop across the internal clamping diodes must be included in this portion of the design (see Figure 6). Note the parasitic diodes (Figure 5) across each QL of each output provide for a complete circuit path for the switched current.

Logic Decoding

Circuit

/HS

Inputs

3.0

2.0

V (V)

1.0

Parasitic

Diodes

OIC

ClkF

Figure 6. Clamp Diode Characteristics

ID (mA)

300100 2000

MOTOROLA ANALOG IC DEVICE DATA

Page 6

MC3479

Full

/Half Step

When this input is at a Logic “0” (<0.8 V), the outputs change a full step with each clock cycle, with the sequence direction depending on the CW steps (Phase A

, B, C, D) for each complete cycle of the sequencing logic. Current flows through both motor coils during each step, as shown in Figure 7.

When taken to a Logic “1” (>2.0 V), the outputs change a half step with each clock cycle, with the sequence direction depending on the CW

/CCW input. Eight steps (Phase A to H) result for each complete cycle of the sequenc ing logic. Phas e A, C, E and G correspond (in polarity) to Phase A, B, C, and D

, respectively, of the full step sequence. Phase B, D, F and

provide current to one motor coil, while de–energizing the other coil. The condition of the outputs of the de–energized coil depends on the OIC input, see Figure 7 timing diagram.

/CCW input. There are four

outputs to the de–energized coil are in a high impedance condition — QL and QH of both outputs (Figure 5) are off. When this input is at a Logic “1” (>2.0 V), a low impedance output is provided to the de–energized coil as both outputs have QH on (QL off). To complete the low impedance path requires connecting VD to VM as described elsewhere in this data sheet.

Bias

/Set

This pin can be used for three functions: a) determining the maximum output sink current; b) setting the internal logic to a known state; and c) reducing power consumption.

a) The maximum output sink current is determined by the base drive current supplied to the lower transistors (QLs of Figure 5) of each output, which in turn, is a function of I

BS.

The appropriate value of IBS is determined by:

OIC

The output impedance control input determines the output impedance to the de–energized coil when operating in the half–step mode. When the outputs are in Phase B

, D, F or H

(Figure 7) and this input is at a Logic “0” (<0.8 V), the two

Figure 7. Output Sequence

Clk

Bias

/Set

/CCW

Phase A A

L1 L2 L3

Phase A Output

L1 L2 L3 L4

DBC

(a) Full Step Mode

(b) Half Step Mode

IBS = IOD × 0.86

where IBS is in microamps, and IOD is the motor current/coil in milliamps.

BCDBCB

= High Impedance F/HS OIC

/CCW = Logic “0”

/HS = Logic “1”, OIC = Logic “0”

= Logic “0”

′

t Care

= Don

= High Impedance

CDBHGDBC EF

GH B L1 L2 L3 L4

Phase A Output

= Logic “0”

/CCW

CW F OIC

/HS

= Logic “1” = Logic “1”

MOTOROLA ANALOG IC DEVICE DATA

Page 7

MC3479

The value of RB (between this pin and ground) is then

determined by:

VM*

RB+

b) When this pin is opened (raised to VM) such that IBS is <5.0 µA, the internal logic is set to the Phase A the four driver outputs are put into a high impedance state. The Phase A

output (Pin 11) goes active (low), and input signals at the controls are ignored during this time. Upon re–establishing IBS, the driver outputs become active, and will be in the Phase A V

). The circuit will then respond to the inputs at the

OLD

position (L1 = L3 = V

controls.

The Set function (opening this pin) can be used as a power–up reset while supply voltages are settling. A CMOS logic gate (powered by VM) can be used to control this pin as shown in Figure 1 1.

c) Whenever the motor is not being stepped, power dissipation in the IC and in the motor may be lowered by reducing IBS, so as to reduce the output (motor) current. Setting IBS to 75 µA will reduce the motor current, but will not reset the internal logic as described above. See Figure 12 for a suggested circuit.

Power Dissipation

The power dissipated by the MC3479 must be such that the junction temperature (TJ) does not exceed 150°C. The power dissipated can be expressed as:

P = (VM  IM) + (2  IOD) [(VM – V where VM = Supply voltage;

IM = Supply current other than IOD; IOD = Output current to each motor coil; V

= Driver output high voltage;

OHD

= Driver output low voltage.

OLD

The power supply current (IM) is obtained from Figure 8. After the power dissipation is calculated, the junction temperature can be calculated using:

TJ = (P  R

where R

= Junction–to–ambient thermal resistance

θJA

(52°C/W for the DIP, 72°C/W for the FN Package);

TA = Ambient Temperature.

Figure 8. Power Supply Current

θJA

0.7 V

) + T

condition, and

OHD

) + V

OHD

, L2 = L4 =

]

OLD

For example, assume an application where VM = 12 V , the motor requires 200 mA/coil, operating at room temperature with no heatsink on the IC. IBS is calculated:

IBS = 200  0.86 IBS = 172 µA

RB is calculated:

RB = (12 – 0.7) V/172 µA RB = 65.7 kΩ

From Figure 8, IM (max) is determined to be 40 mA. From Figure 9, V

is 0.46 volts, and from Figure 10, (VM – V

OLD

OHD

is 1.4 volts.

P = (12  0.040) + (2  0.2) (1.4 + 0.46) P = 1.22 W TJ = (1.22 W  52°C/W) + 25°C TJ = 88°C

This temperature is well below the maximum limit. If the calculated TJ had been higher than 150°C, a heatsink such as the Staver Co. V–7 Series, Aavid #5802, or Thermalloy #6012 could be used to reduce R

. In extreme cases,

θJA

forced air cooling should be considered.

The above calculation, and R

, assumes that a ground

θJA

plane is provided under the MC3479 (either or both sides of the PC board) to aid in the heat dissipation. Single nominal width traces leading from the four ground pins should be avoided as this will increase TJ, as well as provide potentially disruptive ground noise and IR drops when switching the motor current.

Figure 9. Maximum Saturation V oltage —

Driver Output Low

0.8

0.6

(VOLTS)

0.4

OLD

0.2

0 100 200 300

IOD (mA)

)

70 60 50 40

(mA)

30 20 10

IOD = 0

150 200 250 300 350100

IBS (

MOTOROLA ANALOG IC DEVICE DATA

Figure 10. Maximum Saturation V oltage —

2.0

1.5

] (VOLTS)

1.0

OHD

– V

0.5

0 100 200 300

Driver Output High

IOD (mA)

Page 8

Digital Inputs

Phase A

Clock

/CCW

MC3479

Figure 11. Typical Applications Circuit

2.0 k Typ

Ω

11 7

MC3479

1N5221A (3.0 V)

Motor

/Half Step

Full

OIC

Set

Normal

Operation

9 8614

Gnd

MC14049UB or equivalent

131245

Bias

/Set

Figure 12. Power Reduction

MC3479

/Set

Bias

Normal

Operation

Reduced

Power

— Suggested value for RB1 (VM = 12 V) is 150 kΩ. — RB calculation (see text) must take into account the current through RB1.

MC14049UB or equivalent

MOTOROLA ANALOG IC DEVICE DATA

Page 9

MC3479

OUTLINE DIMENSIONS

–T–

SEATING PLANE

–A–

P SUFFIX

PLASTIC PACKAGE

CASE 648C–03

16 9

ISSUE C

–B–

NOTE 5

0.13 (0.005) T

16 PL

FN SUFFIX

PLASTIC PACKAGE

CASE 775–02

(PLCC 20)

ISSUE C

–L–

–N–

Y BRK

–M–

20 1

0.007 (0.180) N

L–M

0.007 (0.180) N

L–M

0.004 (0.100)

–T–

SEATING PLANE

VIEW S

0.010 (0.250) N

0.007 (0.180) N

L–M

J 16 PL

0.13 (0.005) T

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. INTERNAL LEAD CONNECTION BETWEEN 4 AND 5, 12 AND 13.

DIM MIN MAX MIN MAX

A 0.740 0.840 18.80 21.34 B 0.240 0.260 6.10 6.60 C 0.145 0.185 3.69 4.69 D 0.015 0.021 0.38 0.53 E 0.050 BSC 1.27 BSC F 0.040 0.70 1.02 1.78

NOTES:

G 0.100 BSC 2.54 BSC

J 0.008 0.015 0.20 0.38 K 0.115 0.135 2.92 3.43 L 0.300 BSC 7.62 BSC

M 0 10 0 10

N 0.015 0.040 0.39 1.01

1. DATUMS –L–, –M–, AND –N– DETERMINED WHERE TOP OF LEAD SHOULDER EXITS PLASTIC BODY AT MOLD PARTING LINE.

2. DIMENSION G1, TRUE POSITION TO BE MEASURED AT DA TUM –T–, SEATING PLANE.

3. DIMENSIONS R AND U DO NOT INCLUDE MOLD FLASH. ALLOWABLE MOLD FLASH IS 0.010 (0.250) PER SIDE.

4. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.

5. CONTROLLING DIMENSION: INCH.

6. THE PACKAGE TOP MAY BE SMALLER THAN THE PACKAGE BOTTOM BY UP TO 0.012 (0.300). DIMENSIONS R AND U ARE DETERMINED AT THE OUTERMOST EXTREMES OF THE PLASTIC BODY EXCLUSIVE OF MOLD FLASH, TIE BAR BURRS, GATE BURRS AND INTERLEAD FLASH, BUT INCLUDING ANY MISMATCH BETWEEN THE TOP AND BOTTOM OF THE PLASTIC BODY.

7. DIMENSION H DOES NOT INCLUDE DAMBAR PROTRUSION OR INTRUSION. THE DAMBAR PROTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE GREATER THAN 0.037 (0.940). THE DAMBAR INTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE SMALLER THAN 0.025 (0.635).

DIM MIN MAX MIN MAX

A 0.385 0.395 9.78 10.03 B 0.385 0.395 9.78 10.03 C 0.165 0.180 4.20 4.57 E 0.090 0.110 2.29 2.79 F 0.013 0.019 0.33 0.48 G 0.050 BSC 1.27 BSC H 0.026 0.032 0.66 0.81 J 0.020 ––– 0.51 ––– K 0.025 ––– 0.64 ––– R 0.350 0.356 8.89 9.04 U 0.350 0.356 8.89 9.04 V 0.042 0.048 1.07 1.21 W 0.042 0.048 1.07 1.21 X 0.042 0.056 1.07 1.42 Y ––– 0.020 ––– 0.50 Z 2 10 2 10

____

G1 0.310 0.330 7.88 8.38 K1 0.040 ––– 1.02 –––

0.007 (0.180) N

MILLIMETERSINCHES

____

MILLIMETERSINCHES

L–M

0.010 (0.250) N

VIEW D–D

MOTOROLA ANALOG IC DEVICE DATA

0.007 (0.180) N

L–M

VIEW S

Page 10

MC3479

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

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◊

MOTOROLA ANALOG IC DEVICE DATA

MC3479/D

*MC3479/D*