PCF8545 datasheet(67/68 Pages) NXP

67 / 68 page

NXP Semiconductors

PCF8545

Universal LCD driver for multiplex rates up to 1:8

Fig. 29.

Acknowledgement on the I2C-bus .................. 38

Fig. 30.

I2C-bus protocol write mode ........................... 39

Fig. 31.

I2C-bus protocol read mode ............................40

Fig. 32.

Data transfer overview .................................... 41

Fig. 33.

SPI-bus write example .................................... 41

Fig. 34.

SPI-bus example .............................................42

Fig. 35.

Device protection diagram for PCF8545A ....... 42

Fig. 36.

Device protection diagram for PCF8545B ....... 42

Fig. 37.

Typical IDD with respect to temperature ..........46

Fig. 38.

Typical IDD(LCD) in power-down mode

with respect to temperature .............................46

Fig. 39.

Typical IDD(LCD) when display is active

with respect to temperature .............................47

Fig. 40.

Typical clock frequency with respect to

VDD and temperature ..................................... 48

Fig. 41.

Driver timing waveforms ..................................48

Fig. 42.

RESET timing ..................................................48

Fig. 43.

I2C-bus timing waveforms ...............................50

Fig. 44.

SPI-bus timing .................................................51

Fig. 45.

Package outline SOT364-1 (TSSOP56) ..........52

Fig. 46.

Tape and reel details for PCF8545ATT and

PCF8545BTT ...................................................53

Fig. 47.

Temperature profiles for large and small

components .....................................................55

Fig. 48.

Footprint information for reflow soldering of

SOT364-1 (TSSOP56) package ......................57

PCF8545

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

Product data sheet

Rev. 2 — 4 October 2021

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