MC141531 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC141531

LCD Segment / Common Driver CMOS

Motorola => Freescale 

AC ELECTRICAL CHARACTERISTICS (TA=25˚C, Voltage referenced to VSS, AVDD=DVDD=3V)

Symbol

Parameter

Test Condition

FOSC

Oscillation Frequency of Display timing generator

60Hz Frame Frequency

Either External Clock Input or Internal Oscillator

Enabled

FANN Backplane Frequency of Annunciator

(Annun0-3, BP)

50% duty cycle

Annunciator on, Fosc=38.4KHz

FFRM Frame Frequency

Graphic Display Mode,

Timing generator freq. = 38.4kHz

OSC

Internal Oscillation Frequency with different value

of feedback resistor

Icon Mode, Timing generator freq. = 38.4kHz

Internal Oscillator Enabled, VDD within operation

range

Note: FFRM = FOSC / 640

FANN = FOSC / 1280

Min

Typ

Max Unit

-

38.4

-

kHz

-

30

-

Hz

-

60

-

Hz

TBD

See Figure 1 for the relationship

280k

260k

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

MC141531

3–145

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