SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176

DIFFERENTIAL BUS TRANSCEIVERS

SLLS067G − AUGUST 1990 − REVISED APRIL 2006

6

POST OFFICE BOX 655303

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature

PARAMETER

TEST CONDITIONS

SN55LBC176

SN65LBC176Q

SN65LBC176

SN75LBC176

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

MIN

TYP†

MAX

UNIT

td(OD)

Differential output delay time

RL = 54 Ω

CL = 50 pF,

8

31

8

25

ns

tt(OD)

Differential output transition time

RL = 54 Ω,

See Figure 3

CL = 50 pF,

12

12

ns

tsk(p)

Pulse skew ( | td(ODH) − td(ODL) |)

See Figure 3

6

0

6

ns

tPZH

Output enable time to high level

RL = 110 Ω,

See Figure 4

65

35

ns

tPZL

Output enable time to low level

RL = 110 Ω,

See Figure 5

65

35

ns

tPHZ

Output disable time from high level

RL = 110 Ω,

See Figure 4

105

60

ns

tPLZ

Output disable time from low level

RL = 110 Ω,

See Figure 5

105

35

ns

† All typical values are at VCC = 5 V, TA = 25°C.

SYMBOL EQUIVALENTS

DATA SHEET PARAMETER

RS-485

VO

Voa, Vob

| VOD1 |

Vo

| VOD2 |

Vt (RL = 54 Ω)

| VOD3 |

Vt (test termination

measurement 2)

∆ | VOD |

|| Vt | − | Vt ||

VOC

| Vos |

∆ | VOC |

| Vos − Vos |

IOS

None

IO

Iia, Iib