MT8940 View Datasheet(PDF) - Mitel Networks

Part Name

Description

MFG CO.

MT8940

ISO-CMOS ST-BUS FAMILY T1/CEPT Digital Trunk PLL

Mitel Networks 

MT8940 ISO-CMOS

AC Electrical Characteristics† - Uncommitted NAND Gate

Voltages are with respect to ground (VSS) unless otherwise stated.

Characteristics

Sym Min Typ‡ Max

Units

Test Conditions

1 Propagation delay (LOW to

HIGH), input Ai or Bi to output

tPLH

25

40

ns Test load circuit 1 (Fig. 17)

2 Propagation delay (HIGH to

LOW), input Ai or Bi to output

tPHL

20

40

ns Test load circuit 1 (Fig. 17)

† Timing is over recommended temperature & power supply voltages.

‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.

From

output

under test

CL=50pF

Test

point

Test load circuit- 1

From

output

under test

VDD

RL=1kΩ

Test

point

CL=50pF

Test load circuit- 2

VDD

From

output

under test

Test

point

RL=1kΩ

A

S1 B

VSS

CL=50pF

Test load circuit- 3

Note: S1 is in position A

when measuring tPLZ

and tPZ and in position B

when measuring tPHZ and

tPZH

Figure 17 - Test Load Circuits

3-42

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