TS2DDR2811 datasheet(4/13 Pages) TI

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TS2DDR2811

SCDS294 – DECEMBER 2009

www.ti.com

ELECTRICAL CHARACTERISTICS

for 10/100 Base-T Ethernet switching over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V

(unless otherwise noted)

PARAMETER

TEST CONDITIONS(1)

MIN

TYP(2)

MAX

UNIT

VIK

SEL

VCC = 3.6 V,

IIN = –18 mA

–0.7

–1.2

IIH

SEL

VCC = 3.6 V,

VIN = VCC

±1

μA

IIL

SEL

VCC = 3.6 V,

VIN = GND

±1

μA

ICC

VCC = 3.6 V,

II/O = 0,

Switch ON or OFF

250

500

μA

CIN

SEL

f = 1 MHz,

VIN = 0

2.5

COFF

B port

VI = 0,

f = 1 MHz,

Outputs open,

Switch OFF

2.5

CON

VI = 0,

f = 1 MHz,

Outputs open,

Switch ON

rON

VCC = 3 V,

1.25 V

≤ VI ≤ VCC,

IO = –10 mA to –30 mA

Ω

rON(flat)

(3)

VCC = 3 V,

VI = 1.25 V and VCC,

IO = –10 mA to –30 mA

0.5

Ω

ΔrON

(4)

VCC = 3 V,

1.25 V

≤ VI ≤ VCC,

IO = –10 mA to –30 mA

0.4

Ω

(1)

VI, VO, II, and IO refer to I/O pins. VIN refers to the control inputs.

(2)

All typical values are at VCC = 3.3 V (unless otherwise noted), TA = 25°C.

(3)

rON(flat) is the difference of rON in a given channel at specified voltages.

(4)

ΔrON is the difference of rON from center (A4, A5) ports to any other port.

SWITCHING CHARACTERISTICS

over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V, RL = 200 Ω, CL = 10 pF

(unless otherwise noted) (see Figure 5 and Figure 6)

FROM

PARAMETER

MIN

TYP(1)

MAX

UNIT

(INPUT)

(OUTPUT)

tpd

(2)

A or B

B or A

tPZH, tPZL

SEL

A or B

0.5

tPHZ, tPLZ

SEL

A or B

0.9

tsk(o)

(3)

A or B

B or A

100

tsk(p)

(4)

150

(1)

All typical values are at VCC = 3.3 V (unless otherwise noted), TA = 25°C.

(2)

The propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load

capacitance when driven by an ideal voltage source (zero output impedance).

(3)

Output skew between center port (A4 to A5) to any other port

(4)

Skew between opposite transitions of the same output in a given device |tPHL – tPLH|

DYNAMIC CHARACTERISTICS

over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TYP(1)

UNIT

XTALK

RL = 100 Ω,

f = 250 MHz,

See Figure 8

–37

OIRR

RL = 100 Ω,

f = 250 MHz,

See Figure 9

–37

RL = 50 Ω,

See Figure 7

1100

MHz

(1)

All typical values are at VCC = 3.3 V (unless otherwise noted), TA = 25°C.

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