PCF8545 datasheet(45/68 Pages) NXP

45 / 68 page

NXP Semiconductors

PCF8545

Universal LCD driver for multiplex rates up to 1:8

VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 5.5 V; Tamb = -40 °C to +85 °C; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

input voltage

VSS - 0.5

5.5

VIL

LOW-level input voltage

0.3VDD

VIH

HIGH-level input voltage

0.7VDD

output voltage

-0.5

+5.5

leakage current

VI = VDD or VSS

-1

μA

On pin SDA

output sink current

VDD = 1.8 V

5.5

IOL

LOW-level output current

VDD = 3.3 V

SPI-bus

on pin SCL

VSS - 0.5

5.5

input voltage

on pins CE and SDI

VSS - 0.5

VDD + 0.5 V

On pins SCL, CE and SDI

VIL

LOW-level input voltage

0.3VDD

VIH

HIGH-level input voltage

0.7VDD

leakage current

VI = VDD or VSS

-1

μA

LCD outputs

on pins BP0 to BP7

[6] -

2.5

+10

ΔVO

output voltage variation

on pins S0 to S43

[7] -

2.5

+10

VLCD = 5.5 V;

on pins BP0 to BP7

[8] -

0.9

5.0

kΩ

output resistance

VLCD = 5.5 V;

on pins S0 to S43

[8] -

1.5

6.0

kΩ

Table 32. Static characteristics...continued

[1]

Power-down mode is enabled; I2C-bus or SPI-bus inactive.

[2]

1:8 multiplex drive mode; 1⁄4 bias; display enabled; LCD outputs are open circuit; RAM is all written with logic 1; inputs at VSS or VDD; default display

prescale factor; I2C-bus or SPI-bus inactive.

[3]

Strongly linked to VLCD voltage. See Figure 38.

[4]

1:8 multiplex drive mode; 1⁄4 bias; display enabled; LCD outputs are open circuit; RAM is all written with logic 1; default display prescale factor.

[5]

The I2C-bus interface of PCF8545 is 5 V tolerant.

[6]

Variation between any two backplanes on a given voltage level; static measured.

[7]

Variation between any two segments on a given voltage level; static measured.

[8]

Outputs measured one at a time.

PCF8545

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 4 October 2021

45 / 68

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