PCF8537 datasheet(63/82 Pages) NXP

63 / 82 page

PCF8537

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Product data sheet

Rev. 1 — 31 May 2012

63 of 82

NXP Semiconductors

PCF8537

Industrial LCD driver for multiplex rates up to 1:8

[1]

When supplying external VLCD it must be VLCD  VDD2. Also when using the internal charge pump to generate a certain VLCD, VPR[7:0]

must be set to a value that the voltage is higher than VDD2 (see Section 8.4.2).

[2]

Calibrated at testing stage. VLCD temperature compensation is disabled.

[3]

Tested on sample basis.

[4]

If VDD1 < VPOR a reset occurs.

[5]

Variation between any 2 backplanes on a given voltage level; static measured.

[6]

Variation between any 2 segments on a given voltage level; static measured.

[7]

Outputs measured one at a time.

IOL

LOW-level output current

output sink current;

VOL =0.4 V;

VDD =5V;

on pin CLK

VPOR

power-on reset voltage

[4] --

1.6

leakage current

Vi =VDD or VSS;

on pins CLK and A0

1-

A

I2C- and SPI-bus lines; pins SDA, SCL and SDIO

input voltage

pins SDA, SCL

VSS  0.5 -

5.5

pin SDIO

VSS  0.5 -

VDD + 0.5 V

VIL

LOW-level input voltage

pins SDA, SCL, and SDIO

0.3VDD

VIH

HIGH-level input voltage

pins SDA, SCL, and SDIO

0.7VDD

output voltage

pins SDA and SCL

0.5

5.5

SDIO

0.5

VDD + 0.5 V

IOL

LOW-level output current

VOL =0.4 V;

VDD =5V;

on pin SDA and SDIO

IOH

HIGH-level output current

VOH =4.6 V;

VDD =5V;

on pin SDIO

leakage current

VI =VDD or VSS

1-

A

LCD outputs

V

output voltage variation

on pins BP0 to BP7

[5]

15

+15

on pins S0 to S45

[6]

15

+15

output resistance

VLCD = 7 V;

on pins BP0 to BP7

[7] 0.3

0.8

1.5



VLCD = 7 V;

on pins S0 to S45

[7] 0.6

1.5



Table 36.

Static characteristics …continued

VDD1 = 1.8 V to 5.5 V; VDD2 = 2.5 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 9.0 V; Tamb = 40 C to +85 C; temperature

measurement enabled; 1:8 multiplex drive mode; 1⁄4 bias; LCD outputs are open circuit; RAM is all written with logic 1; inputs

at VSS or VDD; internal clock with maximum prescale factor; I2C-bus/SPI-bus inactive; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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