HOLT INTEGRATED CIRCUITS

11

D.C. ELECTRICAL CHARACTERISTICS (cont)

VDD = 3.3V or 5V, GND = 0V, T = Operating Temperature Range (unless otherwise specified).

A

LOGIC INPUTS

Input Voltage

Input Voltage HI

80%

VLOGIC

Input Votage LO

20%

VLOG C

I

Input Current,

, DSEL_n

OE

V

= VLOGIC, 30K

pull down

IN

Ω

125

μA

V

= GND

IN

0.1

μA

Input Current, THS_SEL

V

= VLOGIC

IN

0.1

μA

V

= GND , 30K

pull up

IN

Ω

μA

Input Current, SNSE_SEL

V

= VLOGIC

IN

0.1

μA

V

= GND,

IN

0.1

μA

125

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

DISCRETE INPUTS

SENSE GND/OPEN

Resistance in series with diode to VLOGIC

3.3

KΩ

Resistance in series with diode to VWET

23.8

KΩ

Case 1:

= GND

THS_SEL

Internal Threshold Mode

Ground State Input Voltage

Input voltage to give High output

1.0

V

Open State Input Voltage

Input voltage to give Low output

VDD = 5.5V

VDD = 3.0V

V

Input Current at 0V

V = 0V, VDD = 3.0V

V = 0V, VDD = 5.5V

IN

IN

-0.65

-1.65

mA

mA

Hysteresis

0.15

V

Case 2:

= Open or VLOGIC

THS_SEL

HI_SET/LO_SET pins set Thresholds

HI_SET Threshold Range

0.4

2.2

V

LO_SET Threshold Range

0.3

2.1

V

Min Threshold Window

HI_SET > LO_SET

0.1

V

10:1 Division Accuracy

As measured by Sense Output Change

3.75

2.5

HI-8425, HI-8426

LO Threshold is set to LO_SET X 10

HI Threshold is set to HI_SET X 10

V

+ 0.5

HR

V

V

- 0.5