9-19

Timing Waveform

Multiplex Inputs: Pins 1, 4, 20, 21

-

-

0.8

V

2.0

-

-

V

50

100

-

k

Ω

Digit Driver: Pins 22-24, 26-30

-

-0.3

-

mA

150

180

-

mA

ICM7226B

Segment Driver: Pins 22-24, 26-30

--

10

µA

10

15

-

mA

Multiplex Inputs: Pins 1, 4, 20, 21

--

V

-

-

V

100

360

-

k

Ω

Digit Driver: Pins 8-11, 13-16

50

75

-

mA

-

100

-

µA

NOTES:

1. Assumes all leads soldered or welded to PC board and free air flow.

2. Typical values are not tested.

Electrical Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

MEASUREMENT

IN PROGRESS

30ms TO 40ms

STORE

RESET

INPUT A

INPUT B

PRIMING EDGES

PRIMING

FUNCTION:

TIME INTERVAL

UPDATE

190ms TO 200ms

40ms

60ms

40ms

MEASUREMENT INTERVAL

250ns MIN

MEASURED

INTERVAL

(FIRST)

MEASURED

INTERVAL

(LAST)

UPDATE

NOTE:

1. If range is set to 1 event, first and last measured interval will coincide.

FIGURE 1. WAVEFORMS FOR TIME INTERVAL MEASUREMENT (OTHERS ARE SIMILAR, BUT WITHOUT PRIMING PHASE)

ICM7226A, ICM7226B