DS275 Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS275

Line-Powered RS-232 Transceiver Chip

Dallas Semiconductor -> Maxim Integrated 

DS275

DC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC = VDRV = 5V ±=10%)

PARAMETER

SYMBOL MIN TYP MAX UNITS NOTES

TXOUT Level High

VOTXH

3.5 4.0

5.0

V

6

TXOUT Level Low

VOTXL

-8.5 -9.0

V

7

TXOUT Short Circuit Current

ISC

+60

+85

mA

TXOUT Output Slew Rate

tSR

30

V/µs

Propagation Delay

tPD

5

µs

8

RXIN Input Threshold Low

VTL

0.8 1.2

1.6

V

RXIN Input Threshold High

VTH

1.6 2.0

2.4

V

RXIN Threshold Hysteresis

VHYS

0.5 0.8

V

9

RXOUT Output Current @ 2.4V

IOH

-1.0

mA

RXOUT Output Current @ 0.4V

IOL

3.2

mA

NOTES:

1. VDRV must be greater than or equal to VCC.

2. VCC = VDRV = 5V ±=10%.

3. See test circuit in Figure 4.

4. See test circuit in Figure 5.

5. See test circuit in Figure 6.

6. TXIN = VIL and TX OUT loaded by 3 kΩ=to ground.

7. TXIN = VIH, RXIN = -10 volts and TXOUT loaded by 3 kΩ=to ground.

8. TXIN to TXOUT - see Figure 7.

9. VHYS = VTH - VTL.

6 of 8

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