PCF8545ATT datasheet(33/51 Pages) NXP

33 / 51 page

NXP Semiconductors

PCF8551

Universal 36 × 4 LCD segment driver

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-50

-30

-10

102

103

Tamb (°C)

IDD

(nA)

IDD(LCD)

(nA)

(1)

(2)

VDD = 5.5 V, VLCD = 5.5 V; power-down mode.

1. IDD.

2. IDD(LCD).

Figure 23. Typical IDD and IDD(LCD) in power-down mode as function of temperature

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0.7

1.4

2.7

3.4

4.1

4.7

5.4

CL (nF)

IDD(LCD)

(μA)

(2)

(1)

(4)

(3)

(6)

(5)

(8)

(7)

Tamb = 25 °C; VLCD = 3.3 V; VDD = 3.3 V; ffr = 64 Hz, BOOST = 0.

1. Static, all segments/elements off.

2. Static, all segments/elements on.

3. MUX 1:2, bias level 1⁄2, all segments/elements off.

4. MUX 1:2, bias level 1⁄2, all segments/elements on.

5. MUX 1:3, bias level 1⁄3, all segments/elements off.

6. MUX 1:3, bias level 1⁄3, all segments/elements on.

7. MUX 1:4, bias level 1⁄3, all segments/elements off.

8. MUX 1:4, bias level 1⁄3, all segments/elements on.

Figure 24. Typical IDD(LCD) as function of display load

PCF8551

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Product data sheet

Rev. 3.1 — 3 May 2021

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