SN74ACT8994

DIGITAL BUS MONITOR

IEEE STD 1149.1 (JTAG) SCAN-CONTROLLED LOGIC/SIGNATURE ANALYZER

SCAS196E – JULY 1990 – REVISED DECEMBER 1996

8

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VCC =4 5V

IOH = – 3 mA

EQO

VCC = 4.5 V

IOH = – 4 mA

3.7

EQO

VCC =5 5V

IOH = – 3 mA

VOH

VCC = 5.5 V

IOH = – 4 mA

4.7

V

VOH

VCC =4 5V

IOH = –11 mA

V

PIO TDO

VCC = 4.5 V

IOH = –16 mA

3.7

PIO, TDO

VCC =5 5V

IOH = –11 mA

VCC = 5.5 V

IOH = –16 mA

4.7

EQO

VCC =4 5Vto5 5V

IOL = 3 mA

VOL

EQO

VCC = 4.5 V to 5.5 V

IOL = 4 mA

0.5

V

VOL

PIO TDO

VCC =4 5Vto5 5V

IOL = 11 mA

V

PIO, TDO

VCC = 4.5 V to 5.5 V

IOL = 16 mA

0.5

CLK, D, EQI, TCK

VCC = 5.5 V,

VI = VCC or GND

±1

II

TDI, TMS

VCC = 5.5 V,

VI = VCC

±1

µA

TDI, TMS

VCC = 5.5 V,

VI = GND

– 0.1

–20

IOZ‡

PIO, TDO

VCC = 5.5 V,

VO = VCC or GND

±5

µA

ICC

RAM disabled

VCC = 5.5 V,

VI = VCC or GND,

IO = 0

200

µA

ICC

RAM enabled

VCC = 5.5 V,

VI = VCC or GND,

IO = 0

200

mA

∆ICC

VCC = 5.5 V,

One input at 3.4 V,

Other inputs at VCC or GND

1

mA

Ci

VI = VCC or GND

4*

pF

Cio

VO = VCC or GND

7*

pF

Co

VO = VCC or GND

6*

pF

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

† Typical values are at VCC = 5 V, TA = 25_C.

‡ For I/O pins, the parameter IOZ includes the input-leakage current.

timing requirements over recommended ranges of supply voltage and operating free-air

temperature (see Figure1)

MIN

MAX

UNIT

Any CLK (except during PSARAM instruction)§

0

50

fclock

Clock frequency

TCK (except during PSARAM instruction)§

0

50

MHz

Any CLK or TCK (during PSARAM instruction)§

0

17

tw

Pulse duration

Any CLK or TCK high or low

7

ns

TDI before TCK

↑

2

TMS before TCK

↑

4

tsu

Setup time

Any D before any CLK or TCK

5

ns

EQI before any CLK or TCK

4

PIO before any CLK or TCK

1

TDI after TCK

↑

5

TMS after TCK

↑

3

th

Hold time

Any D after any CLK or TCK

3

ns

EQI after any CLK or TCK

2

PIO after any CLK or TCK

5

td

Delay time

Power up to TCK

↑

100

ns

§ The PSARAM instruction performs a parallel-signature analysis on the contents of RAM. This instruction is provided to allow self-test of the RAM.