LTC1324 データシートの表示（PDF） - Linear Technology

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LTC1324

Single Supply LocalTalk® Transceiver

Linear Technology 

LTC1324

TEST CIRCUITS

TXD+

RL

VOD

TXD–

RL VOC

1324 F01

TXI

TXD+

RL

TXD–

CL RXD+

CL RXD–

RXDO

15pF

1324 F02

OUTPUT

VCC

S1

500Ω

CL

S2

1324 F03

Figure 1

Figure 2

Figure 3

U

W

SWITCHING WAVEFORMS

3V

TXD

0V

VO

–VO

TXD–

TXD+

1.5V

f = 1MHz: tr ≤ 10ns: tf ≤ 10ns

1.5V

tPLH

50%

10%

tr

90% VDIFF = V(TXD+) – V(TXD–)

1/2 VO

tPHL

90%

50%

10%

tf

VO

tSKEW

tSKEW

1324 F04

Figure 4. Differential Driver

3V

TXDEN

0V

5V

TXD+, TXD–

VOL

VOH

TXD–, TXD+

0V

1.5V

f = 1MHz: tr ≤ 10ns: tf ≤ 10ns

1.5V

tZL

tLZ

2.3V

OUTPUT NORMALLY LOW

0.5V

tZH

tHZ

OUTPUT NORMALLY HIGH

0.5V

2.3V

1324 F05

Figure 5. Differential Driver Enable and Disable

V OD2

(RXD +) – (RXD–)

–V OD2

VOH

RXDO

VOL

f = 1MHz: tr ≤ 10ns: tf ≤ 10ns

0V

0V

tPLH

tPHL

1.5V

Figure 6. Differential Receiver

1.5V

1324 F06

6

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