PCF8577CP datasheet(14/28 Pages) PHILIPS

14 / 28 page

1998 Jul 30

Philips Semiconductors

Product speciﬁcation

LCD direct/duplex driver with

I2C-bus interface

PCF8577C

11 AC CHARACTERISTICS

VDD = 2.5 to 6 V; Tamb = −40 to 85 °C; unless otherwise speciﬁed. All the timing values are valid within the operating

supply voltage and ambient temperature range and refer to VIL and VIH with an input voltage swing of VSS to VDD.

Note

1. Typical conditions: VDD = 5 V; Tamb = 25 °C.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.(1)

MAX.

UNIT

fLCD

display frequency

Cosc = 680 pF; Rosc =1MΩ

120

tBS

driver delays with test loads

VDD =5V

−

100

µs

I2C-bus

fSCL

SCL clock frequency

−−

100

kHz

tSW

tolerable spike width on I2C-bus Tamb =25 °C

−−

100

tBUF

I2C-bus free time

4.7

−−µs

tSU;STA

START condition set-up time

4.0

−−µs

tHD;STA

START condition hold time

4.0

−−µs

tLOW

SCL LOW time

4.7

−−µs

tHIGH

SCL HIGH time

4.0

−−µs

SCL and SDA rise time

−−

1.0

µs

SCL and SDA fall time

−−

0.3

µs

tSU;DAT

data set-up time

250

−−

tHD;DAT

data hold time

−−

tSU;STO

STOP condition set-up time

4.0

−−µs

Fig.12 Test loads.

MGA730

Ω

1.5 k

Ω

6.8 k

VDD

) / 2

S32 to S1

(pins 1 to 32)

SCL, SDA

(pins 39, 40)

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