LT3669 View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT3669

IO-Link Transceiver with Integrated Step-Down Regulator and LDO

Linear Technology 

LT3669/LT3669-2

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VL+ = 24V. (Note 4)

SYMBOL PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Digital IO

WAKE, RXD1, SCn Pull-Down Output Current VSCn = VWAKE = VRXD1 = 0.3V

l 0.7

1.05

mA

if Asserted

RST Pull-Down Output Current if Asserted VRST = 0.3V

VIH

TXDn, TXENn, SR Input High Voltage

VIL

TXDn, TXENn, SR Input Low Voltage

ILK

TXDn, TXENn, SR Pin Input Leakage Current

CIN

TXDn, TXENn, SR Pin Input Capacitance

l 0.2

0.3

mA

l 0.9

V

l

0.4

V

0.1

1

µA

2.5

pF

SWITCHING CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VL+ = 24V. (Note 4)

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Driver and Receiver

fDTR

tBIT

Driver

Maximum Data Transfer Rate

Bit Time

CCQ1,Q2 ≤ 4nF

VSR ≤ 0.4V (for COM1/COM2)

VSR ≥ 0.9V (for COM3)

VSR ≤ 0.4V (for COM2)

VSR ≥ 0.9V (for COM3)

l 38.4

kb/s

l 230.4

kb/s

26.04

µs

4.34

µs

tDR

tDF

tPHLD, tPLHD

tSKEWD

tZHD, tZLD

tHZD, tLZD

tDWU

Rise Time

CCQ1,Q2 ≤ 4nF (Figure 1)

VSR ≤ 0.4V (for COM1/COM2)

l

VSR ≥ 0.9V (for COM3)

l

Fall Time

CCQ1,Q2 ≤ 4nF (Figure 1)

VSR ≤ 0.4V (for COM1/COM2)

l

VSR ≥ 0.9V (for COM3)

l

Propagation Delay

CCQ1,Q2 ≤ 4nF (Figure 2)

VSR ≤ 0.4V (for COM1/COM2)

l

VSR ≥ 0.9V (for COM3)

l

Skew

tSKEWD = |tPHLD – tPLHD|, CCQ1,Q2 ≤ 4nF (Figure 2)

VSR ≤ 0.4V (for COM1/COM2)

l

VSR ≥ 0.9V (for COM3)

l

Enable Time

CCQ1,Q2 = 100pF, RPU = RPD = 10k (Figure 3)

VSR ≤ 0.4V (for COM1/COM2)

l

VSR ≥ 0.9V (for COM3)

l

Disable Time

CCQ1,Q2 = 100pF, RPU = RPD = 10k (Figure 3)

VSR ≤ 0.4V (for COM1/COM2)

l

VSR ≥ 0.9V (for COM3)

l

Minimum Wake-Up Pulse Duration to RPU = RPD = 10k (Figure 7)

l

Be Acknowledged

WAKE Pull-Up Resistor = 5k

1.6

5.2

µs

0.26 0.869

µs

2.1

5.2

µs

0.34 0.869

µs

3.3

6

µs

0.72

1.3

µs

0.25

1.5

µs

140

400

ns

3.4

6.1

µs

0.8

1.4

µs

4

6

µs

4

6

µs

55

75

µs

tLZW

Delay From Handshake Sequence

WAKE Pull-Up Resistor = 5k

Finished to WAKE High (Note 9)

0.3

1

µs

Pulsing On-Time

Pulsing Off-Time

VRQH (VRQL) = 24V, Only CQ1 or Q2 Pulsing

320

µs

2.2

ms

For more information www.linear.com/LT3669

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