DS89C21

SNLS091C – JUNE 1998 – REVISED APRIL 2013

www.ti.com

Switching Characteristics

(1) (2)

Over recommended supply voltage and operating temperature ranges, unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

DIFFERENTIAL DRIVER CHARACTERISTICS

tPLHD

Propagation Delay LOW to HIGH

RL = 100Ω

(Figure 2 Figure 3)

2

4.9

10

ns

tPHLD

Propagation Delay HIGH to LOW

CL = 50 pF

2

4.5

10

ns

tSKD

Skew, |tPLHD–t PHLD|

0.4

2.0

ns

tTLH

Transition Time LOW to HIGH

(Figure 2 Figure 4)

2.2

9

ns

tTHL

Transition Time HIGH to LOW

2.1

9

ns

RECEIVER CHARACTERISTICS

tPLH

Propagation Delay LOW to HIGH

CL = 50 pF

(Figure 5 Figure 6)

6

18

30

ns

tPHL

Propagation Delay HIGH to LOW

VDIFF = 2.5V

6

17.5

30

ns

tSK

Skew, |tPLH–t PHL|

VCM = 0V

0.5

4.0

ns

tr

Rise Time

(Figure 7)

2.5

9

ns

tf

Fall Time

2.1

9

ns

(1)

All typicals are given for VCC = 5.0V and T A = 25°C.

(2)

f = 1 MHz, tr and tf ≤ 6 ns.

Parameter Measurement Information

Figure 1. VOD and VOC Test Circuit

f = 1 MHz, tr and tf

≤ 6 ns.

Figure 2. Driver Propagation Delay Test Circuit

4

Submit Documentation Feedback

Copyright © 1998–2013, Texas Instruments Incorporated

Product Folder Links: DS89C21