SN54ACT8990, SN74ACT8990

TEST-BUS CONTROLLERS

IEEE STD 1149.1 (JTAG) TAP MASTERS WITH 16-BIT GENERIC HOST INTERFACES

SCAS190E – JUNE 1990 – REVISED JANUARY 1997

7

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

TA = 25°C

SN54ACT8990

SN74ACT8990

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

MAX

MIN

MAX

UNIT

VCC =4 5V

IOH = –20 µA

4.4

4.4

4.4

VOH

VCC = 4.5 V

IOH = –8 mA

3.7

3.7

3.7

V

VOH

VCC =5 5V

IOH = –20 µA

5.4

5.4

5.4

V

VCC = 5.5 V

IOH = –8 mA

4.7

4.7

4.7

VOL

VCC = 4.5 V

IOL = 20 µA

0.1

0.1

0.1

V

VOL

CC

to 5.5 V

IOL = 8 mA

0.5

0.5

0.5

V

I

ADRS, RD,

WR, TCKI

VCC = 5.5 V,

VI = VCC or GND

±1

±1

±1

A

II

TDI, TOFF,

VCC =5 5V

VI = VCC

±1

±1

±1

µA

TDI, TOFF,

TRST

VCC = 5.5 V

VI = GND

–35

–70

–250

–35

–250

–35

–250

I

‡

INT, RDY, TCKO,

TDO, TMS

VCC = 5.5 V,

VO = VCC or GND

±10

±10

±10

A

IOZ‡

DATA,

VCC =5 5V

VO = VCC

±10

±10

±10

µA

,

TMS/EVENT

VCC = 5.5 V

VO = GND

–35

–70

–250

–35

–250

–35

–250

VCC = 5.5 V,

VI =VCC or GND

450*

450

450

µA

I

IO = 0,

VI = VCC or GND

450*

450

450

µA

ICC

VCC = 5.5 V,

CL = 50 pF

100

mA

fclock = 30 MHz

100

mA

Ci

VI = VCC or GND

5*

pF

Cio

VI = VCC or GND

9*

pF

Co

VI = VCC or GND

8*

pF

* On products compliant to MIL-PRF-38535, this parameter does not apply.

† Typical values are at VCC = 5 V.

‡ For I/O ports, the parameter IOZ includes the input leakage.