Datasheet STMUX1800L Datasheet (ST)

Features

STMUX1800L

16- to 8-bit MUX/DEMUX for gigabit Ethernet LAN switch

with LED switch and enhanced ESD protection

■ Low R

■ V

CC

■ Enhanced ESD protection: > 8 kV (contact) and

: 4.0 Ω typical

ON

operating range: 3.0 to 3.6 V

15 kV (HBM)

■ Channel on capacitance: 9.5 pF typical

■ Switching time speed: 9 ns

■ Near to zero propagation delay: 250 ps

■ Very low crosstalk: -45 dB at 250 MHz

■ Bit-to-bit skew: 200 ps

■ > 600 MHz -3 dB typical bandwidth (or data

frequency)

■ Three SPDT switches for LED support

■ Rail-to-rail switching on data I/O ports

(0 V to 5 V)

■ Package: QFN56

■ Pb-free

Applications

■ 10/100/1000 Mbit Ethernet switching

■ Audio/video switching

QFN56

Description

The STMUX1800L is a 16- to 8-bit
multiplexer/demultiplexer low R
LAN switch designed for various standards, such
as 10/100/1000 Ethernet. It is designed for very
low crosstalk, low bit-to-bit skew and low I/O
capacitance.

bidirectional

ON

The differential signal from the Gigabit Ethernet
transceiver is multiplexed into one of two selected
outputs while the unselected switch goes to Hi-Z
status.

The device integrates three SPDT (single pole
dual throw) switches, for LED support.

Table 1. Device summary

Order code Package Packing

STMUX1800LQTR QFN56 Tape and reel

June 2009 Doc ID 14869 Rev 4 1/21

www.st.com

21

Contents STMUX1800L

Contents

1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2/21 Doc ID 14869 Rev 4

STMUX1800L Pin description

1 Pin description

Figure 1. Pin connection (top through view)

LED2

LED1

VDD

SEL

GNDHG

GNDFE

VDD

GNDDC

GND

N/C

VDDBA

GND

GND

LED1_0

LED2_0

GND

LED1_1

LED2_1

VDD

GND

F1

F0

H1G1H0

G0

GND

E1

E0

VDD

D1C1D0

GND

C0

GND

B1A1B0

A0

Table 2. Pin description

Pin Symbol Name and function

2, 3, 7, 8, 11, 12, 14, 15 A, B, C, D, E, F, G, H 8-bit bus

48, 47, 43, 42, 37, 36, 32, 31 A0, B0, C0, D0, E0, F0, G0, H0 8-bit multiplexed to bus 0

46, 45, 41, 40, 35, 34, 30, 29 A1, B1, C1, D1, E1, F1, G1, H1 8-bit multiplexed to bus 1

VDD

GND

LED3

GND

LED3_0

LED3_1

VDD

GND

CS000103

5 N/C Not connected

17 SEL Bus and LED switch selection

19, 20, 54 LED1, LED2, LED3 LED switch input

22, 23, 25, 26, 51, 52

4, 10, 18, 27, 38, 50, 56 V

1, 6, 9, 13, 16, 21, 24, 28, 33,

39, 44, 49, 53, 55

LED1_0, LED2_0, LED1_1,

LED2_1, LED3_1, LED3_0

DD

GND Ground

LED switch output

Supply voltage

Doc ID 14869 Rev 4 3/21

Pin description STMUX1800L

Figure 2. Input equivalent circuit

Table 3. LAN switch function table

SEL Function

L 8-bit bus to 8-bit multiplexed bus 0

H 8-bit bus to 8-bit multiplexed bus 1

4/21 Doc ID 14869 Rev 4

CS000104

STMUX1800L Pin description

Table 4. LED switch function table

SEL Function

L LED switch input connected to LED switch output X_0

H LED switch input connected to LED switch output X_1

Doc ID 14869 Rev 4 5/21

Maximum ratings STMUX1800L

2 Maximum ratings

Stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.

Table 5. Absolute maximum ratings

Symbol Parameter Value Unit

V

CC

V

V

I

O

P

T

stg

T

Supply voltage to ground -0.5 to 4.6 V

DC input output voltage -0.5 to 4.6 V

IO

DC control input voltage -0.5 to 4.6 V

IC

DC output current

Power dissipation 0.5 W

D

(1)

Storage temperature -65 to 150 °C

Lead temperature (10 sec) 300 °C

L

1. If VIO x IO does not exceed the maximum limit of PD.

2.1 Recommended operating conditions

Table 6. Recommended operating conditions

Symbol Parameter

V

V

V

T

Supply voltage to ground 3 – 3.6 V

CC

DC control input voltage (SEL) 0 – 5 V

IC

DC input/output voltage 0 – V

IO

Operating temperature -40 – 85 ° C

A

120 mA

Val ue

Min Typ Max

CC

Unit

V

6/21 Doc ID 14869 Rev 4

STMUX1800L Electrical characteristics

3 Electrical characteristics

Table 7. DC electrical characteristics for Gigabit Ethernet LAN8/16MUX/DEMUX

(V

= 3.3 V ±10%)

CC

Val ue

Symbol Parameter Test condition

Min Typ Max

IOFF

V

V

V

I

I

IH

IL

IK

IH

IL

(SW)

Voltage input high (SEL) High level guaranteed 2 – – V

Voltage input low
(SEL)

Clamp diode voltage
(SEL)

Input high current
(SEL)

Input low current
(SEL)

Leakage current through
the switch common

(1)

terminals (A to H)
(LED1 to LED3)

Low level guaranteed -0.5 – 0.8 V

VCC = 3.6 V
IIN = -18 mA

VCC = 3.6 V

= V

V

IN

CC

VCC = 3.6 V

= GND

V

IN

= 3.6 V

V

CC

A to H = V

CC

LED1 to LED3 = V
A0 to H0 = 0 V
A1 to H1 = floating

CC

– -0.8 -1.2 V

––±5µA

––±5µA

––±1µA

LEDx_0 = 0 V
LEDx1 = floating

IOFF

(SEL)

SEL pin leakage current

SEL = V

VCC= 0 V
SEL = 0 to 3.6 V

CC

––±1µA

VCC = 3.0 V

R

ON

Switch ON resistance

(2)

= 1.5 to V

V

IN

CC

–4.06.5Ω

IIN = -40 mA

Unit-40 to 85 °C

VCC = 3.0 V

R

FLAT

ON resistance flatness

(3)

ON resistance match

ΔR

1. Refer to Figure 4: Test circuit for leakage current (IOFF) on page 11

2. Measured by voltage drop between channels at indicated current through the switch. ON resistance is determined by the
lower of the voltages.

3. Flatness is defined as the difference between the R

ΔR

4.

ON

between channel

ON

ΔR

= R

ON

(2)(4)

measured at same VCC, temperature and voltage level.

ONMAX-RONMIN

(2)

V

IN

I

IN

VCC = 3.0 V
V

IN

IIN = -40 mA

at 1.5 and VCC

= -40 mA

= 1.5 to V

ONMAX

CC

and R

–0.5–Ω

–0.41Ω

of ON resistance over the specified range.

ONMIN

Doc ID 14869 Rev 4 7/21

Electrical characteristics STMUX1800L

Table 8. DC electrical characteristics for 10/100 Ethernet LAN8/16MUX/DEMUX

(V

= 3.3 V ±10)

CC

Val ue

Symbol Parameter Test condition

Min Typ Max

Voltage input high
(SEL)

Voltage input low

IL

(SEL)

Clamp diode voltage

IK

(SEL)

Input high current
(SEL)

Input low current
(SEL)

Leakage current
through the switch

(1)

common terminals (A to
H)

(LED1 to LED3)

High level guaranteed 2 – – V

Low level guaranteed -0.5 – 0.8 V

VCC = 3.6 V
IIN = -18 mA

VCC = 3.6 V
VIN = V

CC

VCC = 3.6 V

= GND

V

IN

= 3.6 V

V

CC

A to H = V

CC

LED1 to LED3 = V
A0 to H0 = 0 V
A1 to H1 = floating

CC

– -0.7 -1.2 V

––±5µA

––±5µA

––±1µA

LEDx_0 = 0 V

IOFF

V

IH

V

V

I

IH

I

IL

(SW)

LEDx1 = floating

IOFF

SEL pin leakage current

(SEL)

SEL = V

VCC= 0 V
SEL = 0 to 3.6 V

CC

––±1µA

VCC = 3.0 V

R

ON

Switch ON resistance

(2)

= 1.5 to V

V

IN

CC

–4.06.5Ω

IIN = -10 to -30 mA

Unit-40 to 85 °C

R

FLAT

ON resistance flatness

(2) (3)

ON resistance match

ΔR

1. Refer to Figure 4: Test circuit for leakage current (IOFF) on page 11

2. Measured by voltage drop between channels at indicated current through the switch. ON resistance is determinate by the
lower of the two voltages.

3. Flatness is defined as the difference between the R

ΔR

4.

between channel

ON

ΔR

= R

ON

ONMIN

(2)(4)

R

measured at same VCC, temperature and voltage level.

ON

ONMAX

-

VCC = 3.0 V
VIN at 1.5 and V
I

= -10 to -30 mA

IN

CC

VCC = 3.0 V

= 1.5 to V

V

IN

CC

IIN = -10 to -30 mA

and R

ONMAX

–0.5–Ω

–0.41Ω

of ON resistance over the specified range.

ONMIN

8/21 Doc ID 14869 Rev 4

STMUX1800L Electrical characteristics

Table 9. Capacitance (TA = 25 °C, f = 1 MHz)

Val ue

Symbol Parameter Test condition

Min Typ Max

Unit

DC = 0.25 V
AC = 0.5 V
f=1MHz

DC = 0.25 V
AC = 0.5 V
f=1MHz

DC = 0.25 V
AC = 0.5 V
f=1MHz

PP

PP

PP

IN

OFF

ON

SEL pin input
capacitance

Switch off
capacitance

Switch on
capacitance

(1)

(2)

(3)

C

C

C

1. Refer to Figure 5 on page 12

2. Refer to Figure 6 on page 12

3. Refer to Figure 7 on page 13

Table 10. Power supply characteristics

Symbol Parameter Test condition

I

Quiescent power

CC

supply

VCC = 3.6 V, VIN = VCC or
GND

–23pF

–45pF

– 9.5 11 pF

Val ue

Unit-40 to 85 °C

Min Typ Max

– 150 500

µA

Table 11. Dynamic electrical characteristics (V

= 3.3 V ±10%)

CC

Val ue

Symbol Parameter Test condition

Unit-40 to 85 °C

Min Typ Max

(3)

RL= 100 Ω
f = 250 MHz

RL= 100 Ω
f = 250 MHz

RL= 100 Ω

< V

≤ 3.6 V

0

IN

–-45–dB

–-37–dB

– 600 – MHz

X

O

talk

IRR

Crosstalk

Off isolation

(1)

(2)

BW -3 dB bandwidth

1. Refer to Figure 9 on page 14

2. Refer to Figure 10 on page 15

3. Refer to Figure 8 on page 13

Doc ID 14869 Rev 4 9/21

Electrical characteristics STMUX1800L

Table 12. Switching characteristics (TA = 25 °C, VCC = 3.3 V ±10%)

Val ue

Symbol Parameter Test condition

Min Typ Max

Unit

t

t

PZH

t

PZL

t

PHZ

t

PLZ

Propagation delay VCC = 3 to 3.6 V – 0.25 – ns

PD

,

Line enable time, SE
to x to x0 or x to x1

,

Line disable time, SE
to x to x0 or x to x1

V

CC

V

CC

Output skew

t

SK(O)

between center port

VCC = 3 to 3.6 V – 0.1 0.2 ns

to any other port

Skew between

t

SK(P)

opposite transition of
the same output

, t

PLH

)

(t

PHL

V

CC

Table 13. ESD performance

Symbol Test condition

Contact discharge
IEC61000-4-2

ESD

Human body model
(MIL-STD-883)

(1)

= 3 to 3.6 V 0.5 6.5 15 ns

= 3 to 3.6 V 0.5 6.5 8.5 ns

= 3 to 3.6 V – 0.1 0.2 ns

Val ue

Unit

Min Typ Max

–±8–kV

–±15–kV

1. Refer to Figure 3: Diagram for suggested VDD decoupling on page 11.

10/21 Doc ID 14869 Rev 4

STMUX1800L Electrical characteristics

Figure 3. Diagram for suggested VDD decoupling

C=2uF or

4.7uF

Note: 100nF Capacitors must be used as local bypass capacitors between the adjacent VDD and GND pairs (total 7)

1. Applicable for system level ESD test

VDD

GND

1

VDD

4

GND

6

GND

9

VDD

10

GND

13

GND

16

VDD

18

21 24 27 28

GND

GND

GND

DUT

GND

VDD

GND

4950535556

GND

44

GND

39

VDD

38

GND

33

VDD

GND

Figure 4. Test circuit for leakage current (I

OFF

)

3.6 V

VDD

I

A0

OFF(SW)

A

FLOAT

A1

3.6 V

3.6 V

SEL

GND

Doc ID 14869 Rev 4 11/21

Electrical characteristics STMUX1800L

Figure 5. Test circuit for SEL pin input capacitance (CIN)

3.3 V

VDD

LCR meter

DC = 0.25 V

AC = 0.5 Vpp

f = 1 MHz

SEL

DUT

GND

Figure 6. Test circuit for switch off capacitance (C

L or H

H for channel 0

and L for channel 1

SEL

LCR meter

DC = 0.25 V

AC = 0.5 Vpp

f = 1 MHz

A

OFF

DUT

)

3.3 V

VDD

A0

A1

GND

12/21 Doc ID 14869 Rev 4

STMUX1800L Electrical characteristics

Figure 7. Test circuit for switch on capacitance (CON)

VDD

DUT

GND

3.3 V

A0

A1

LCR meter

DC = 0.25 V

AC = 0.5 Vpp

f = 1 MHz

L or H

L for channel 0 and

H for channel 1

SEL

A

Figure 8. Test circuit for bandwidth measurement (BW)

AA0

Frequency response is measured at the output of the ON channel. For example, when

= 0 and A is the input, the output is measured at A0. All unused analog I/O ports are

V

SEL

left open.

HP8753ES setup:

Average = 4

R

= 3 kHz

V

BW

BIAS

= 0.35 V

ST = 2 s

P1 = 0 dBm

Doc ID 14869 Rev 4 13/21

Electrical characteristics STMUX1800L

Figure 9. Test circuit for crosstalk measurement (x

DUT

A0

B0

A1

B1

C0

D0

C1

D1

A

B

C

D

talk

)

Crosstalk is measured at the output of the non-adjacent ON channel. For example, when

= 0, and B is the input, the output is measured at D. All unused analog input ports are

V

SEL

connected to GND and output ports are left open.

HP8753ES setup:

Average = 4

R

= 3 kHz

BW

V

= 0.35 V

BIAS

ST = 2 s

P1 = 0 dBm

14/21 Doc ID 14869 Rev 4

STMUX1800L Electrical characteristics

Figure 10. Test circuit for off isolation measurement (O

A

B

A0

B0

A1

B1

Off isolation is measured at the output of the OFF channel. For example, when V

IRR

)

=0, and

SEL

B is the input, the output is measured at B1. All unused analog input ports are connected to
GND and output ports are left open.

HP8753ES setup:

Average = 4

R

= 3 kHz

BW

V

= 0.35 V

BIAS

ST = 2 s

P1 = 0 dBm

Doc ID 14869 Rev 4 15/21

Package mechanical data STMUX1800L

4 Package mechanical data

In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK

®

packages, depending on their level of environmental compliance. ECOPACK®

®

is an ST trademark.

Figure 11. Package outline for QFN56 (11 x 5 mm) pitch 0.5 mm

16/21 Doc ID 14869 Rev 4

7576329-A

STMUX1800L Package mechanical data

Figure 12. Mechanical data for QFN56 (11 x 5 mm) pitch 0.5 mm

Millimeters

Symbol

Min Typ Max

A 0.700.750.80

A1 – – 0.05

A3 0.20 –

b 0.200.250.30

D 10.90 11.00 11.10

D2 8.30 8.40 8.50

D3 –9.50–

E 4.905.005.10

E2 2.30 2.40 2.50

E3 –3.50–

e – 0.50 –

L 0.300.400.50

Figure 13. Footprint recommendation for QFN56 (11 x 5 mm) pitch 0.5 mm

Doc ID 14869 Rev 4 17/21

Package mechanical data STMUX1800L

Figure 14. Carrier tape information for QFN56 (11 x 5 mm) pitch 0.5 mm

7875978_K

18/21 Doc ID 14869 Rev 4

STMUX1800L Package mechanical data

Figure 15. Reel information for QFN56 (11 x 5 mm) pitch 0.5 mm

Doc ID 14869 Rev 4 19/21

Revision history STMUX1800L

5 Revision history

Table 14. Document revision history

Date Revision Changes

26-Feb-2008 1 Initial release.

Modified: datasheet title, channel on capacitance value from 7.5 pF
to 9.5 pF typical, Figure 1, Ta bl e 2 , Section 3: Electrical

24-Sep-2008 2

characteristics.

Added: fields of applications, Ta bl e 6 and QFN56 footprint
recommendations in Figure 13 on page 17.

30-Mar-2009 3

Updated: Features section, Table 5 on page 6, Table 11 on page 9
and Table 13 on page 10 and Chapter 4: Package mechanical data.

22-Jun-2009 4 Document promoted from Preliminary data to datasheet.

20/21 Doc ID 14869 Rev 4

STMUX1800L

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Doc ID 14869 Rev 4 21/21