AM79C985 datasheet(35/48 Pages) AMD

35 / 48 page

Am79C985

PRELIMINARY

ABSOLUTE MAXIMUM RATINGS

Storage Temperature . . . . . . . . . . –65

° C to +150° C

Ambient Temperature Under Bias . . . . 0

° C to +70° C

Supply Voltage referenced to

AVSS or DVSS (AVDD, DVDD). . . . . . . –0.3 V to +6.0 V

Stresses above those listed under ABSOLUTE MAXI-

MUM RATINGS may cause permanent device failure.

Functionality at or above these limits is not implied.

Exposure to Absolute Maximum Ratings for extended

periods may affect reliability. Programming conditions

may differ.

OPERATING RANGES

Commercial (C) Devices

Temperature (TA) . . . . . . . . . . . . . . . . . 0° C to +70° C

Supply Voltages (VDD) . . . . . . . . . . . . . . . . .+5 V ±5%

Operating ranges deﬁne those limits between which

the functionality of the device is guaranteed.

DC CHARACTERISTICS over Commercial operating ranges unless otherwise speciﬁed

Parameter

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

Digital I/O

VIL

Input LOW Voltage

VSS = 0.0 V

–0.5

0.8

VIH

Input HIGH Voltage

VSS = 0.0 V

2.0

0.5 + VDD

VOL

Output LOW Voltage

IOL = 4.0 mA

–

0.4

VOH

Output HIGH Voltage

IOH = –0.4 mA

2.4

–

IIL

Input Leakage Current

VSS<VIN<VDD

–

µA

IILSTR

Input Leakage Current for STR pin

VSS<VIN<VDD

–

µA

VOLOD

Open Drain Output LOW Voltage (LED pins)

IOLOD = 12 mA

–

0.4

AUI Ports

IIAXD

Input Current at DI

± and CI± Pairs

VSS<VIN<VDD

–500

500

µA

VAICM

±, CI± Open Circuit Input Voltage Range

IIN = 0

VDD – 3.0

VDD – 1.0

VAIDV

Differential Mode Input Voltage Range

(DI, CI)

VDD = 5.0 V

–2.5

+2.5

VASQ

DI, CI Squelch Threshold

–

–275

–160

VATH

DI Switching Threshold

(Note 1)

-35

+35

VAOD

Differential Output Voltage

(DO+) – (DO)

RL = 78 Ω

620

1100

VAOC

Differential Output Voltage

(CI+) – (CI–)

(Reverse Mode)

RL = 78 Ω

620

1100

VAODI

DO Differential Output Voltage Imbalance

RL = 78 Ω

–25

+25

VAODOFF DO Differential Idle Output Voltage

RL = 78 Ω

–40

+40

IAODOFF

DO Differential Idle Output Current

RL = 78 Ω (Note 1)

–1.0

+1.0

VAOCM

DO+, DO- Common Mode Output Voltage

RL = 78 Ω

2.5

VDD

Twisted Pair Ports

IIRXD

Input Current at RXD

and CI

± Pairs

AVSS<VIN<VDD

–500

500

µA

RRXD

RXD Differential Input

(Note 1)

–

Ω

VTIVB

RXD+, RXD– Open Circuit

Input Voltage (bias)

VDD – 3.0

VDD – 1.5

VTID

Differential Mode Input

Range (RXD)

VDD = 5.0 V

–3.1

+3.1

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