CY7B991-7JI(2001) Просмотр технического описания (PDF) - Cypress Semiconductor

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производитель

CY7B991-7JI
(Rev.:2001)

Programmable Skew Clock Buffer

Cypress Semiconductor 

CY7B991

CY7B992

1Fx

2Fx

(N/A)

LL

LM

LH

ML

MM

MH

HL

HM

HH

(N/A)

(N/A)

(N/A)

FBInput

REFInput

3Fx

4Fx

LM

– 6t U

LH

(N/A)

– 4t U

– 3t U

ML

(N/A)

– 2t U

– 1t U

MM

(N/A)

MH

(N/A)

HL

HM

LL/HH

HH

0tU

+1t U

+2t U

+3t U

+4t U

+6t U

DIVIDED

INVERT

7B991–3

Figure 1. Typical Outputs with FB Connected to a Zero-Skew Output[4]

Test Mode

The TEST input is a three-level input. In normal system oper-

ation, this pin is connected to ground, allowing the

CY7B991/CY7B992 to operate as explained briefly above (for

testing purposes, any of the three-level inputs can have a re-

movable jumper to ground, or be tied LOW through a 100Ω

resistor. This will allow an external tester to change the state

of these pins.)

If the TEST input is forced to its MID or HIGH state, the device

will operate with its internal phase locked loop disconnected,

and input levels supplied to REF will directly control all outputs.

Relative output to output functions are the same as in normal

mode.

In contrast with normal operation (TEST tied LOW). All outputs

will function based only on the connection of their own function

select inputs (xF0 and xF1) and the waveform characteristics

of the REF input.

Maximum Ratings

(Above which the useful life may be impaired. For user guide-

lines, not tested.)

Storage Temperature .................................–65°C to +150°C

Ambient Temperature with

Power Applied ............................................ –55°C to +125°C

Supply Voltage to Ground Potential ...............–0.5V to +7.0V

DC Input Voltage ............................................–0.5V to +7.0V

Output Current into Outputs (LOW)............................. 64 mA

Static Discharge Voltage ........................................... >2001V

(per MIL-STD-883, Method 3015)

Latch-Up Current..................................................... >200 mA

Operating Range

Range

Commercial

Ambient

Temperature

0°C to +70°C

VCC

5V ± 10%

Industrial

Military[5]

–40°C to +85°C

–55°C to +125°C

5V ± 10%

5V ± 10%

Notes:

4. FB connected to an output selected for “zero” skew (i.e., xF1 = xF0 =

MID).

5. Indicates case temperature.

Document #: 38-07138 Rev. **

Page 3 of 15

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