SN55LBC976

9-CHANNEL DIFFERENTIAL TRANSCEIVER

SGLS091A – JUNE 1995 – REVISED JANUARY 1997

6

POST OFFICE BOX 655303

receiver switching characteristics over recommended operating conditions (see Figure 5) (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

t d

Propagation delay time, high-to-low-level output (tPHL) or

16

36

ns

tpd

gy

,

g

( PHL)

low-to-high-level output (tPLH)

VCC = 5 V,

TA = 25°C

21

31

ns

t k(li )

Skew limit, the maximum difference in propagation delay times

12

ns

tsk(lim)

,g

y

between any two drivers on any two devices

VCC = 5 V,

See Note 2

9

ns

t k( )

Pulse skew ( | tPHL tPLH|)

2

6

ns

tsk(p)

Pulse skew (|tPHL – tPLH|)

TA = – 55°C

10

ns

tt

Transition time ( tr or tf )

3

ns

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

NOTE 2: This specification applies to any 5

°C band within the operating temperature range.

transceiver switching characteristics over recommended operating conditions

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

ten(RXL)

Enable time, transmit-to-receive to low-level output

180*

ns

ten(RXH) Enable time, transmit-to-receive to high-level output

180*

ns

ten(TXL)

Enable time, receive-to-transmit to low-level output

See Figure 6

110*

ns

ten(TXH)

Enable time, receive-to-transmit to high-level output

110*

ns

tsu

Setup time, CDE0, CDE1, CDE2, BSR, or CRE to active input(s) or output(s)

180*

ns

*

This parameter is not production tested.

thermal characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

R

θJA

Junction-to-free-air thermal resistance

Board mounted,

No air flow

95.4

°C/W

R

θJC Junction-to-case thermal resistance

5.67

°C/W

PARAMETER MEASUREMENT INFORMATION

–IOH,

–IOL,

–IOS,

or

–IOZ

CDE0 at 5 V,

DE/RE at 5 V,

BSR at 0 V

Others Open

(see Note A)

A

B+

B–

VOD

VIH

or

VIL

–IIH

or

–IIL

VO,

VOH,

or

VOL

NOTE A: For the IOZ test, the BSR input is at 5 V and all others are at 0 V.

Figure 1. Driver Test Circuit and Input Conditions