ST STMUX3040 User Manual

NEATSwitch™: octal SPDT high bandwidth signal switch

Features

■ Supports 3.0 Gbps generic data rate

■ Octal SPDT switch to support 2 PCI lanes

■ Low R

■ Internal voltage regulator

■ V

CC

–1.65 –2.7

■ Low current consumption: 150 µA

■ ESD HBM model: 2 kV

■ Channel on capacitance: 6 pF typical

■ Switching time speed: 9 ns

■ Near to zero propagation delay: 250 ps

■ Bandwidth: -3 dB at 1200 MHz

■ Low crosstalk: -20 dB at 1200 MHz

■ Bit-to-bit skew: 50 ps typical

■ Data and control inputs provide undershoot

clamp diode

■ Wide bandwidth minimizes skew and jitter

■ Hot insertion capable

■ Supports bidirectional operation

■ Supports PCI-E gen. 1, display ports, LVDS,

TMDS and video signaling

■ -40 °C to 85 °C operating temperature range

: 5.5 Ω typical

ON

operating range:

− 2.0 V (internal regulator bypassed)

− 3.6 V (internal regulator active)

STMUX3040

TQFN42

Description

The STMUX3040 is a differential octal single pole double throw (SPDT) bidirectional signal switch with low R standards such as PCIe gen 1, LVDS, TMDS and video signaling.

The STMUX3040 features very low cross-talk, low bit-to-bit skew, high channel-to-channel noise isolation and low I/O capacitance.

The STMUX3040 switch offers very little or practically no attenuation of the high speed signals at the outputs, thus preserving the signal integrity to pass stringent requirements.

. It is designed to support various

ON

Applications

■ Workstation

■ PC and notebooks

Table 1. Device summary

Order code Package Packaging

STMUX3040QTTR TQFN42 Tape and reel

October 2008 Rev 2 1/17

www.st.com

17

Contents STMUX3040

Contents

1 Functional diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Device operation table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Internal voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Absolute maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 DC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.3 Power supply characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.4 Dynamic electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.5 Dynamic switching characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.6 ESD performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2/17

STMUX3040 Functional diagrams

1 Functional diagrams

Figure 1. Functional diagram (switches)

Figure 2. Functional diagram (internal regulator)

3.3V to 1.8V Voltage Regulator

V33 (2.7V-3.3V)

(Bypassed when V33 < 2.2V)

GND GND

3/17

Vreg and VCC

Pin settings STMUX3040

2 Pin settings

2.1 Pin connection

Figure 3. Pin connection (top through view)

Vcc GND Vcc GND

42 41 40 39

A0

A1

GND

Vcc

A2

A3

V33

SEL

GND

A4

A5

Vcc

GND

A6

A7

GND

10

11

12

13

14

15

16

17

1

2

3

4

5

6

7

8

9

18

19 20 21

38

37

34

33

32

31

30

29

28

27

26

25

24

23

22

0B1 GND

1B1

2B1

3B1

0B2

1B2

2B2

3B2 Vreg

4B1

5B1

6B1

7B1

4B2

5B2

6B2

7B2

Vcc GND Vcc GND

4/17

TQFN42

STMUX3040 Pin settings

2.2 Pin description

Table 2. Pin description

Pin number Pin name Function

1 GND Ground

2A

3A

0

1

4 GND Ground

5Vcc

6A

7A

2

3

8V33

9 SEL Switch select pin

10 GND Ground

Switch

1.65 - 2.0 V supply Tied to V

if V33 > 2.2 V

REG

Switch

2.7 V – 3.3 V (internal regulator active)

1.65 – 2.0 V (internal regulator bypassed)

11 A

12 A

13 Vcc

4

5

Switch

1.65 – 2.0 V supply Tied to V

14 GND Ground

15 A

16 A

6

7

Switch

17 GND Ground

18 Vcc

1.65 – 2.0 V supply Tied to V

19 GND Ground

20 Vcc

1.65 – 2.0 V supply Tied to V

21 GND Ground

22

23

24

25

26

27

28

7B2

6B2

5B2

4B2

7B1

6B1

5B1

Switch

if V33>2.2V

REG

if V33>2.2V

REG

if V33>2.2V

REG

5/17

Pin settings STMUX3040

Table 2. Pin description (continued)

Pin number Pin name Function

29

4B1

30 VREG

31

32

33

34

35

36

37

38

3B2

2B2

1B2

0B2

3B1

2B1

1B1

0B1

Switch

Output of internal regulator 22 nF capacitor required here

Switch

39 GND Ground

40 Vcc

1.65 – 2.0 V supply Tied to V

41 GND Ground

42 Vcc

1.65 – 2.0 V supply Tied to V

if V33>2.2V

REG

if V33>2.2V

REG

2.3 Device operation table

Table 3. Operation table

SEL Function

LA

HA

to NB

N

to NB

N

1

2

6/17