AS-Interface Slave IC

AS2701A (ISA3+)

Rev. C, October 2000

Page 8 of 16

Symbol

Parameter

min

max

Unit

Note

VIL

Input Voltage “Low”

0

1.5

V

VIH

Input Voltage “High”

3.5

VUOUT

V

VHYST

Input Hysteresis

0.25

0.5

V

1

VOL11

Output Voltage

0

1

V

IOL11 = 10mA

D0… D3, DSTBn

VOL12

Output Voltage

0

1

V

IOL12 = 6mA

P0… P3, PSTBn

VOL2

Output Voltage

0

0.4

IOL2 = 2mA

IIL

Input Current

-20

-5

µA

VIL = 1V, Output “off”

IIH

Input Current

-10

10

µA

VU5R

Output “off”

CDL

Loading Capacitance

on DSTBn

10

pF

2

Notes:

1 Switching points approx. 2.5 V, i.e. 2.5 V

±VHYST

2 For larger capacitive loads an external Pull-Up-Resistor to UOUT must be used, so that

the beginning of the DSTB = LOW impulse of VIH

35 µs, otherwise a reset is the result.

Timing characteristics

Symbol

Parameter

min

max

Unit

Note

DSTBn to D0… D3, Direction OUT,

Output Data LOW

1

µs

DSTBn to D0… D3, Direction OUT,

Output Data HIGH

1.5

µs

DSTBn to D0… D3, High Resistive

6.2

7

µs

1

DSTBn Pulse Width

6

6.8

µs

DSTBn to D0… D3, Direction IN, Valid

Input Data

6.5

7.7

µs

DSTBn to D0… D3, End of Direction IN

12.5

t CYCLE

µs

Next Cycle

150

µs

Extension DSTBn to D0… D3, High

Resistive

44

µs

Extension DSTBn (No Reset)

35

µs

Note 1: Data valid until DSTBn L/H-edge