PD2437 datasheet(5/11 Pages) OSRAM

5 / 11 page

 2001 OSRAM Opto Semiconductors Inc.• San Jose, CA

PD2535/6/7, PD3535/6/7, PD4435/6/7

www.inﬁneon.com/opto • 408-456-4000

OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany

www.osram-os.com • +49-941-202-7178

July 5, 2001-14

DC Characteristics at 25

°C

Note:

1) D0 to D7 have no pull-up resistors so current is negligible.

Pin Assignments and Deﬁnitions

Parameter

Limits

Conditions

Min.

Typ.

Max.

Units

VCC

4.5

5.0

5.5

Volts

Nominal

ICC (Blank)

—

2.5

3.5

VCC=5.0 V, A2=1, all other inputs low.

ICC 80 LEDs/unit (100% Bright)

PD243X

PD353X

PD443X

—

115

145

150

130

165

170

VCC=5.0 V

VIL

—

0.8

Volts

VCC=4.5 V to 5.5 V

VIH

2.0

—

Volts

VCC=4.5 V to 5.5 V

IIL (except D0 to D7)

(1)

—

100

µA

VCC=4.5 V to 5.5 V, VIN=0.8 V

VOL

—

0.4

Volts

VCC=4.5 V to 5.5 V

VOH

2.4

—

Volts

VCC=4.5 V to 5.5 V

IOH

–8.9

—

VCC=4.5 V, VOH=2.4 V

IOL

1.6

—

VCC=4.5 V, VOL=0.4 V

Data I/O Bus Loading

—

100

—

Clock I/O Bus Loading

—

240

—

Function

Deﬁnition

1RD

Active low, will enable a processor to

read all registers in the display.

CLK I/O

If CLK SEL (pin 3) is low, then expect

an external clock source into this pin.

If CLK SEL is high, then this pin will

be the master or source into this pin.

If CLK SEL is high, then this pin will

be the master or source for all other

devices which have CLK SEL low.

CLKSEL

CLOCK SELECT determines the

action of pin 2. CLK I/O, see the sec-

tion on Cascading for an example.

RST

Reset. Used to synchronize blinking.

Will not clear the display. The reset

pulse should be less than 1 ms

CE1

Chip enable (active high).

CE0

Chip enable (active low).

Address input (MSB).

Address input.

Address input (LSB).

GND

Ground.

Pin Assignments and Deﬁnitions (continued)

Function

Deﬁnition

Write. Active low. If the device is

selected, a low on the write input

loads the data into memory.

Data Bus bit 7 (MSB).

Data Bus bit 6.

Data Bus bit 5.

Data Bus bit 4.

Data Bus bit 3.

Data Bus bit 2.

Data Bus bit 1.

Data Bus bit 0 (LSB).

VCC

Positive power pin.

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