PCF8820 datasheet(33/60 Pages) PHILIPS

33 / 60 page

2000 Dec 07

Philips Semiconductors

Product speciﬁcation

× 101 Grey-scale/ECB colour dot matrix

LCD driver

PCF8820

Notes

1. The minimum value for VLCDIN is limited by the supply voltages VDD1 and VDD2:

a) For VDD1 ≤ 4.5 V and VDD2 ≤ 4.5 V: VLCDIN > 4.5 V.

b) For VDD1 > 4.5 V or VDD2 > 4.5 V: VLCDIN > highest value of VDD1 or VDD2.

2. All static currents are switched off in Power-down mode; no external clock.

3. VDD1 =VDD2 =VDD3 = 2.75 V; LCD outputs are open-circuit; inputs connected to VDD1 or VSS1; I2C-bus inactive;

external clock with fext = 336 kHz; Tamb =27 °C.

4. The typical currents are measured on a sample base with the DDRAM and grey-scale registers loaded with data

which would produce the display shown in Fig.23 if an LCD was connected. Extensive use of grey-scales will

increase current consumption compared to black and white mode. If specified, the maximum current is tested with a

regular pattern which is equivalent in current to the display shown in Fig.23.

5. Voltage multiplier disabled; pins VLCDIN, VLCDOUT and VLCDSENSE connected together.

TC5

temperature coefﬁcient 5

−−2.55 × 10−3 −

K−1

TC6

temperature coefﬁcient 6

−−2.72 × 10−3 −

K−1

TC7

temperature coefﬁcient 7

−−2.98 × 10−3 −

K−1

REFERENCE TEMPERATURE

Tcp

cut-point temperature

−

−°C

Temperature read-out

conversion constant

−

1.13

−°C/bit

atol

tolerance of a

same supply voltage VDD

−−

repeatability

−−

bit

affect of changing VDD

−−

0.5

bit/V

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

handbook, full pagewidth

MGT131

Fig.23 Display used to define DDRAM and grey-scales for current measurements.

PCF8820 Datasheet(PDF) 33 Page - NXP Semiconductors

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