19-1789; Rev 1; 10/02
Single/Dual, Ultra-Fast, ECL-Output
Comparators with Latch Enable
General Description
The MAX9691/MAX9692/MAX9693 are ultra-fast ECL
comparators capable of very short propagation delays.
Their design maintains the excellent DC matching char-
acteristics normally found only in slower comparators.
The MAX9691/MAX9692/MAX9693 have differential
inputs and complementary outputs that are fully com-
patible with ECL-logic levels. Output current levels are
capable of driving 50Ω terminated transmission lines.
The ultra-fast operation makes signal processing possi-
ble at frequencies in excess of 600MHz.
The MAX9692/MAX9693 feature a latch-enable (LE)
function that allows the comparator to be used in a
sample-hold mode. When LE is ECL high, the compara-
tor functions normally. When LE is driven ECL low, the
outputs are forced to an unambiguous ECL-logic state,
dependent on the input conditions at the time of the
latch input transition. If the latch-enable function is not
used on either of the two comparators, the appropriate
LE input must be connected to ground; the companion
LE
input must be connected to a high ECL logic level.
These devices are available in SO, QSOP, and tiny
µMAX packages for added space savings.
o
1.2ns Propagation Delay
o
100ps Propagation Delay Skew
o
150ps Dispersion
o
0.5ns Latch Setup Time
o
0.5ns Latch-Enable Pulse Width
o
Available in µMAX and QSOP Packages
o
+5V, -5.2V Power Supplies
Features
MAX9691/MAX9692/MAX9693
Ordering Information
PART
MAX9691EUA
MAX9691ESA
MAX9691EPA
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 SO
8 PDIP
Ordering Information continued at the end of data sheet.
Selector Guide
PART
MAX9691
MAX9692
COMPARATORS
PER PACKAGE
1
1
LATCH
ENABLE
No
Yes
PIN-
PACKAGE
8
µMAX,
8 SO, 8 PDIP
10
µMAX,
16 SO, 16 PDIP
16 QSOP,
16 SO, 16 PDIP
________________________Applications
High-Speed Line Receivers
Peak Detectors
Threshold Detectors
High-Speed Triggers
MAX9693
2
Yes
Pin Configurations appear at end of data sheet.
_________________________________________________________Functional
Diagrams
IN+
Q OUT
NONINVERTING
INPUT
Q OUT
INVERTING
INPUT
INVERTING
INPUT
NONINVERTING
INPUT
IN-
R
L
MAX9691
V
T
R
L
Q OUT
Q OUT
RL
LE LE
RL
RL
RL
LE LE
V
T
MAX9693
MAX9693
LATCH ENABLE
LATCH ENABLE
THE OUTPUTS ARE OPEN EMITTERS, REQUIRING EXTERNAL PULLDOWN
RESISTORS. THESE RESISTORS MAY BE IN THE RANGE OF 50Ω TO 200Ω
CONNECTED TO -2.0V, OR 240Ω TO 2000Ω CONNECTED TO -5.2V.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
