24

5387B–HIREL–07/05

PC7447A [Preliminary]

This is because in the PC7447 it is possible to drive the latches associated with the former ‘No Connect’ pins in the PC7447,

potentially causing contention on those pins. To prevent this, ensure that these pins are not connected on the board or, if they

are connected, ensure that the states of internal PC7447 latches do not cause these pins to be driven during board testing.

9. Electrical Characteristics

9.1

Static Characteristics

.

Notes:

3. Excludes test signals and IEEE 1149.1 boundary scan (JTAG) signals.

5. Capacitance is periodically sampled rather than 100% tested.

6. Excludes signals with internal pull ups: BVSEL, LSSD_MODE, TDI, TMS, and TRST. Characterization of leakage current for

these signals is currently being conducted.

Table 9-1.

Symbol

Characteristic

Nominal Bus

Min

Max

Unit

Notes

Input high voltage (all inputs)

1.8

V

(2)

2.5

1.7

OV

V

IL

Input low voltage (all inputs)

1.8

-0.3

V

(2)(6)

2.5

-0.3

0.7

Input leakage current,

––

30

-30

µA

(2)(3)

High-impedance (off-state) leakage current,

V

––

30

-30

µA

(2)(3)(4)

V

OH

Output high voltage at I

1.8

–

V

2.5

1.8

–

V

OL

Output low voltage at I

1.8

–

0.45

V

2.5

–

0.6

C

IN

Capacitance,

f = 1 MHz

All other inputs

–

8

pF

(5)

V

IH

Input high voltage (all inputs)

1.8

OV

OV

V

(2)

2.5

1.7

Input low voltage (all inputs)

1.8

-0.3

OV

V

(2)(6)

2.5

-0.3

0.7

I

IN

Input leakge current,

V

V

––

30

-30

µA

(2)(3)