MAX9321 datasheet(7/9 Pages) MAXIM

7 / 9 page

Detailed Description

The MAX9321/MAX9321A are low-skew differential

receiver/drivers designed for clock and data distribu-

tion. For interfacing to differential HSTL and LVPECL

signals, these devices operate over a +2.25V to +3.8V

supply range, allowing high-performance clock and

data distribution in systems with a nominal +2.5V or

+3.3V supply. For differential LVECL operation, these

devices operate from a -2.25V to -3.8V supply.

Inputs

The differential input can be configured to accept a sin-

gle-ended input when operating at approximately VCC -

VEE = 3.0V to 3.8V. This is accomplished by connect-

ing the on-chip reference voltage, VBB, to an input as a

reference. For example, the differential D, D input is

converted to a noninverting, single-ended input by con-

necting VBB to D and connecting the single-ended

input to D. An inverting input is obtained by connecting

VBB to D and connecting the single-ended input to D.

With the differential input configured as single ended

(using VBB), the single-ended input can be driven to

VCC and VEE or with a single-ended LVPECL/LVECL

signal.

When the differential input is configured as a single-

ended input (using VBB), the approximate supply range

is VCC - VEE = 3.0V to 3.8V. This is because one of the

inputs must be VEE + 1.2V or higher for proper opera-

tion of the input stage. VBB must be at least VEE + 1.2V

because it becomes the high-level input when the other

(single-ended) input swings below it. Therefore, mini-

mum VBB = VEE + 1.2V.

The minimum VBB output is VCC - 1.510V. Substituting

the minimum VBB into VBB = VEE + 1.2V results in a

minimum supply of 2.71V. Rounding up to a standard

supply gives the single-ended operating supply range

of VCC - VEE = 3.0V to 3.8V.

Differential LVPECL/LVECL/HSTL

Receiver/Drivers

_______________________________________________________________________________________

(CONNECTED TO D)

VIL

VIH

VBB

VOH - VOL

VOH

VOL

Figure 1. Switching with Single-Ended Input

0 (DIFFERENTIAL)

80%

20%

80%

20%

0 (DIFFERENTIAL)

VOH - VOL

VIHD - VILD

VIHD

VILD

VOH

VOL

tPLHD

tPHLD

(Q) - (Q)

Figure 2. Differential Transition Time and Propagation Delay Timing Diagram

MAX9321 Datasheet(PDF) 7 Page - Maxim Integrated Products

MAX9321 Datasheet(HTML) 7 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9

Datasheet Download

Link URL