MC141539 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC141539

LCD Segment / Common Driver with Controller

Motorola => Freescale 

ELECTRICAL CHARACTERISTICS (Voltage Referenced to VSS, AVDD=DVDD=2.4 to 3.5V, TA=25˚C)

Total variation of VR ∆VRT is affected by the following factors :

Process variation of Regulator ∆VR

External VDD Variation contributed to Regulator ∆VVDD

External resistor pair Ra/Rf contributed to Regulator ∆Vres

where ∆V RT = (∆V R)2 + (∆V V DD)2 + (∆V res)2

Assume external VDD variation is +/-6% at 3.15V and 1% variation resistor used at application

TC Level

∆VVDD (%)

∆VR (%)

TC0

Reference

TC1

Generator

TC2

TC3

±6.0

±4.0

±2.5

±2.5

±1.4

∆Vres (%)

±1.414

∆VRT (%)

±6.652

±4.924

±3.805

±3.195

AC ELECTRICAL CHARACTERISTICS (TA=25˚C, Voltage referenced to VSS, VDD=2.4 to 3.15V)

Symbol

FOSC1

FANN1

FFRM1

Fosc2

FANN2

FFRM2

OSC

Parameter

Test Condition

Oscillation Frequency.

Set Clock Frequency to Low

Oscillation Frequency of Display Timing Genera-

tor with 60Hz Frame Frequency.

Annunciator Display Frequency (with 50% duty

cycle) from Pins Annun0-3 and BP

LCD Driving Signal Frame Frequency.

Either External Clock Input or Internal Oscillator

Enable, Either 1/32 or 1/16 Duty Cycle, Graphic

Display Mode

Oscillation Freq.

Set Clock Frequency to High

Oscillation Frequency of Display Timing Genera-

tor with 60Hz Frame Frequency.

Annunciator Display Frequency (with 50% duty

cycle) from Pins Annun0-3 and BP

LCD driving Signal Frame Frequency.

Either External Clock Input or Internal Oscillator

Enable, Either 1/32 Duty Cycle

Internal Oscillation Frequency

Internal OSC Oscillation Frequency with Differ-

ent Value of Feedback Resistor.

Internal Oscillator Enabled. VDD within Operation

Range

Set Clock Frequency to Slow : FFRM1=FOSC1/576

Set Clock Frequency to Normal : FFRM2=FOSC2/768

Min

Typ

Max Unit

-

38.4

-

kHz

-

18.75

-

Hz

-

66

-

Hz

-

50

-

kHz

-

24.4

-

Hz

-

65

-

Hz

See Figure 1 for the relationship

220k

200k

90k

70k

Oscillation

Frequency 50k

(Hz)

30k

10k

100k

500k

1.0M

1.5M

2.0M

Resistor Value between OSC1 and OSC2 (Ω)

Figure 1. Internal Oscillator Frequency Relationship with External Resistor Value

MOTOROLA

MC141539

3–127

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