11C90DC datasheet(4/10 Pages) NSC

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ECL OperationMilitary Version

DC Electrical Characteristics

VCC e VCCA e GND VEE eb52V

Symbol

Parameter

Min

Typ

Max

Units

Conditions

VOH

Output HIGH Voltage

1100

1030

900

55 C

Load e 100X to b2V

Q and Q

980

910

820

25 C

910

820

670

125 C

VOL

Output LOW Voltage

1820

1705

1620

55 Cto

Q and Q

125 C

VIH

Input HIGH Voltage

1190

905

55 C

Guaranteed Input HIGH

1095

810

25 C

Signal (Note 6)

975

690

125 C

VIL

Input LOW Voltage

1890

1525

55 C

Guaranteed Input LOW

1850

1485

25 C

Signal

1800

1435

125 C

IIH

Input HIGH Current

VIN e VIHA

CP Input (Note 1)

400

25 C

MS Input

400

25 C

M1 and M2 Input

250

25 C

IIL

Input LOW Current

25 CVIN e VILB

IEE

Power Supply Current

110

25 C

Pins 6 7 13 not connected

119

55 Cto

125 C

VEE

Operating Supply

55 Cto

Voltage Range

125 C

VREF

Reference Voltage

1550

1150

25 C

VRM1 e VRM2 eb52V

IN eb100 mA

AC Electrical Characteristics

TA eb55 Cto a125 C VCC e VCCA e GND VEE eb52V

Symbol

Parameter

55 C

25 C

125 C

Units

Conditions

Typ

Min

Typ

Max

Typ

tPLH

Propagation Delay

Output

tPHL

(50% to 50%) CP to Q

RL e 50X to b20V

tPLH

Propagation Delay

(50% to 50%) MS to Q

Input

Setup Time M to CP

tri e tfi e 20 g01 ns

Hold Time M to CP

(20% to 80%)

tTLH

Output Rise Time

See

Figure 1

(20% to 80%)

tTHL

Output Fall Time

(80% to 20%)

fMAX

Maximum Clock Frequency

AC Coupled Input 350 mV

700

600

650

600

MHz

Peak-to-Peak fMAX is

Guaranteed to be 550 MHz

Min at b55 Cto a125 C

Note 1

Conditions for testing not shown in the Table are chosen to guarantee operation under ‘‘worst case’’ conditions

Note 2

The specified limits represent the ‘‘worst case’’ value for the parameter Since these ‘‘worst case’’ values normally occur at the temperature and supply

voltage extremes additional noise immunity and guard banding can be achieved by decreasing the allowable system operating ranges

Note 3

Typical limits are at VCC e 50V and TA ea25 C

Note 4

The M1 and M2 threshold specifications are normally referenced to the VCC potential as shown in the ECL operation tables Using VEE (GND) as the

reference as in normal TTL practice effectively makes the threshold vary directly with VCC Threshold is typically 13V below VCC (eg a37V at VCC ea5V) A

signal swing about threshold of g04V is adequate which gives the state VIH and VIL values The internal 2 kX resistors are intended to pull TTL outputs up to the

required VIH range as discussed in the Functional Description and shown in Figure 5

Note 5

TTL Output Signal swing is guaranteed at fMAX over temperature range

Note 6

M1 or M2 can be tied to VCC for fixed divide-by-ten operation

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