max9389etj-t Maxim Integrated Products, Inc., max9389etj-t Datasheet - Page 7

• Manufacturer Part Number: max9389etj-t
• Description: Max9389 Differential 8 1 Ecl/pecl Multiplexer With Dual Output Buffers
• Manufacturer: Maxim Integrated Products, Inc.

Figure 5. Output-to-Output Skew (t
The MAX9389 is a fully differential, high-speed, low-jitter
8-to-1 ECL/PECL mux with dual output buffers. The
device is designed for clock and data distribution appli-
cations, and features extremely low propagation delay
(310ps typ) and output-to-output skew (30ps max).
Three single-ended select inputs, SEL0, SEL1, and
SEL2, control the mux function (see Table 1). The mux
select inputs are compatible with ECL/PECL logic, and
are internally referenced to the on-chip reference output
(V
accept signals between V
pulldowns to V
select inputs are left open. Leaving SEL0, SEL1, and
SEL2 open selects the D0, D0 inputs by default.
The differential inputs D_, D_ can be configured to
accept a single-ended signal when the unused comple-
mentary input is connected to the on-chip reference
voltage (V
and V
gle-ended operations. A single-ended input of at least
V
switches the outputs to the V
fied in the DC Electrical Characteristics table. The maxi-
mum magnitude of the differential input from D_ to D_ is
±3.0V. This limit also applies to the difference between a
single-ended input and any reference voltage input.
BB
BB1
_ ±100mV or a differential input of at least 100mV
Q0
Q0
Q1
Q1
, V
BB2
BB2
provide the reference voltage needed for sin-
BB1
), nominally V
Differential 8:1 ECL/PECL Multiplexer with
, V
EE
t
SKOO
BB2
_______________________________________________________________________________________
ensure a low default condition if the
)
.
Detailed Description
Voltage reference outputs V
CC
CC
- 1.425V. The select inputs
OH
SKOO
and V
and V
) Definition
EE
t
SKOO
. Internal 165kΩ
OL
levels speci-
BB1
Table 1. Mux Select Input Truth Table
*Default output when SEL0, SEL1, and SEL2 are left open.
The recommended supply voltage for single-ended
operation is 3.0V to 3.8V. The differential inputs (D_,
D_) can be configured to accept single-ended inputs
when operating at supply voltages greater than 2.725V.
In single-ended mode operation, the unused comple-
mentary input needs to be connected to the on-chip
reference voltage, V
example, the differential D_, D_ inputs are converted to
a noninverting, single-ended input by connecting V
or V
D_. Similarly, an inverting input is obtained by connect-
ing V
ended input to D_. The single-ended input can be
driven to V
LVPECL/LVECL signal.
Figure 6. Input-to-Output Skew (t
OUTPUT
BB2
DATA
D0*
BB1
D1
D2
D3
D4
D5
D6
D7
D1–D7
D1–D7
Dual Output Buffers
D0
D0
Q0
Q0
Q0
Q0
to D_ and connecting the single-ended input to
or V
t
SKIO
= | t
CC
BB2
PLHD
L or open
L or open
L or open
L or open
* - t
or V
SEL0
t
t
PLHD
to D_ and connecting the single-
PLHD
PLHD
H
H
H
H
BB1
**
*
** | OR | t
EE
Single-Ended Operation
or V
or with a single-ended
PHLD
SKIO
BB2
* - t
L or open
L or open
L or open
L or open
) Definition
PHLD
SEL1
, as a reference. For
H
H
H
H
** |
t
t
PHLD
PHLD
**
*
L or open
L or open
L or open
L or open
SEL2
H
H
H
H
BB1
7