SN65ALS176, SN75ALS176, SN75ALS176A, SN75ALS176B

DIFFERENTIAL BUS TRANSCEIVERS

SLLS040G – AUGUST 1987 – REVISED DECEMBER 1999

6

POST OFFICE BOX 655303

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

temperature range (unless otherwise noted)

SN65ALS176

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

td(OD)

Differential output delay time

RL = 54 Ω,

CL = 50 pF,

See Figure 3

15

ns

tsk(p)

Pulse skew‡

RL =54 Ω

CL =50 pF

See Figure 3

0

2

ns

tsk(lim)

Pulse skew§

RL = 54 Ω,

CL = 50 pF,

See Figure 3

15

ns

tt(OD)

Differential output transition time

RL = 54 Ω,

CL = 50 pF,

See Figure 3

8

ns

tPZH

Output enable time to high level

RL = 110 Ω,CL = 50 pF,

See Figure 4

80

ns

tPZL

Output enable time to low level

RL = 110 Ω,CL = 50 pF,

See Figure 5

30

ns

tPHZ

Output disable time from high level

RL = 110 Ω,CL = 50 pF,

See Figure 4

50

ns

tPLZ

Output disable time from low level

RL = 110 Ω, CL = 50 pF,

See Figure 5

30

ns

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

‡ Pulse skew is defined as the |tPLH – tPHL| of each channel of the same device.

§ Skew limit is the maximum difference in propagation delay times between any two channels of any two devices.

SN75ALS176, SN75ALS176A, SN75ALS176B

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

’ALS176

3

8

13

td(OD)

Differential output delay time

’ALS176A

RL = 54 Ω,

CL = 50 pF,

See Figure 3

4

7

11.5

ns

()

’ALS176B

5

8

10

tsk(p)

Pulse skew‡

RL = 54 Ω,

CL = 50 pF,

See Figure 3

0

2

ns

§

’ALS176

10

tsk(lim)

Pulse skew§

’ALS176A

RL = 54 Ω,

CL = 50 pF,

See Figure 3

7.5

ns

()

’ALS176B

5

tt(OD)

Differential output transition time

RL = 54 Ω,

CL = 50 pF,

See Figure 3

8

ns

tPZH

Output enable time to high level

RL = 110 Ω, CL = 50 pF,

See Figure 4

23

50

ns

tPZL

Output enable time to low level

RL = 110 Ω, CL = 50 pF,

See Figure 5

14

20

ns

tPHZ

Output disable time from high level

RL = 110 Ω, CL = 50 pF,

See Figure 4

20

35

ns

tPLZ

Output disable time from low level

RL = 110 Ω, CL = 50 pF,

See Figure 5

8

17

ns

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

‡ Pulse skew is defined as the |tPLH – tPHL| of each channel of the same device.

§ Skew limit is the maximum difference in propagation delay times between any two channels of any two devices.

SYMBOL EQUIVALENTS

DATA-SHEET PARAMETER

TIA/EIA-422-B

TIA/EIA-485-A

VO

Voa, Vob

Voa, Vob

| VOD1 |

Vo

Vo

| VOD2 |

Vt (RL = 100 Ω)

Vt (RL = 54 Ω)

| VOD3 |

None

Vt (test termination

measurement 2)

∆ | VOD |

|| Vt | – | Vt ||

|| Vt | – | Vt ||

VOC

| Vos |

| Vos |

∆ | VOC |

| Vos – Vos |

| Vos – Vos |

IOS

| Isa |, | Isb |

None

IO

| Ixa |, | Ixb |

Iia, Iib