CY2305SI-1HT datasheet(3/19 Pages) CYPRESS

Part #	CY2305SI-1HT

Description	Low Cost 3.3-V Zero Delay Buffer

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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3 / 19 page

CY2305, CY2309

Document Number : 38-07140 Rev. *M

Page 3 of 19

Pinouts

Figure 1. Pin Diagram - CY2305

Figure 2. Pin Diagram - CY2309

Table 1. Pin Description for CY2305

Signal

Description

1

REF[1]

Input reference frequency, 5-V tolerant input

2

CLK2[2]

Buffered clock output

3

CLK1[2]

Buffered clock output

4

GND

Ground

5

CLK3[2]

Buffered clock output

6VDD

3.3-V supply

7

CLK4[2]

Buffered clock output

8

CLKOUT[2]

Buffered clock output, internal feedback on this pin

Table 2. Pin Description for CY2309

Signal

Description

1

REF[1]

Input reference frequency, 5-V tolerant input

2

CLKA1[2]

Buffered clock output, Bank A

3

CLKA2[2]

Buffered clock output, Bank A

4VDD

3.3-V supply

5

GND

Ground

6

CLKB1[2]

Buffered clock output, Bank B

7

CLKB2[2]

Buffered clock output, Bank B

8

S2[3]

Select input, bit 2

9

S1[3]

Select input, bit 1

10

CLKB3[2]

Buffered clock output, Bank B

11

CLKB4[2]

Buffered clock output, Bank B

12

GND

Ground

1

2

3

4

5

8

7

6

REF

CLK2

CLK1

GND

VDD

CLKOUT

CLK4

CLK3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

REF

CLKA1

CLKA2

VDD

GND

CLKB1

CLKB2

S2

CLKOUT

CLKA4

CLKA3

VDD

GND

CLKB4

CLKB3

S1

Notes

1. Weak pull down.

2. Weak pull down on all outputs.

3. Weak pull ups on these inputs.

[+] Feedback

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