
_______________General Desc ription
The MAX9685 is an ultra-fast ECL comparator manufac-
tured with a high-frequency bipolar process (f
T
= 6GHz)
capable of very short propagation delays. This design
maintains the excellent DC matching characteristics nor-
mally found only in slower comparators.
The device is pin-compatible with the AD9685 and
Am6685, but exceeds their AC characteristics.
The MAX9685 has differential inputs and complemen-
tary outputs that are fully compatible with ECL-logic lev-
els. Output current levels are capable of driving 50
terminated transmission lines. The ultra-fast operation
makes signal processing possible at frequencies in
excess of 600MHz.
A latch-enable (LE) function is provided to allow the
comparator to be used in a sample-hold mode. When
LE is ECL high, the comparator 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, the LE pin must be
connected to ground.
________________________Applic ations
High-Speed A/D Converters
High-Speed Line Receivers
Peak Detectors
Threshold Detectors
High-Speed Triggers
____________________________Features
o
1.3ns Propagation Delay
o
0.5ns Latch Setup Time
o
+5V, -5.2V Power Supplies
o
Pin-Compatible with AD9685, Am6685
o
Available in Commercial, Extended-Industrial,
and Military Temperature Ranges
o
Available in Narrow SO Package
______________Ordering Information
* Contact factory for availability of 20-pin PLCC.
**Contact factory for dice specifications.
M
Ultra-Fast ECL-Output Comparator
with Latc h Enable
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
TOP VIEW
MAX9685
2
4
9
8
7
6
5
4
3
2
V+
GND1
1
IN+
IN-
LE
V-
N.C.
Q OUT
Q OUT
GND2
10
TO-100
DIP/SO
1
3
5
6
7
8
16
15
14
13
12
11
10
9
GND2
N.C.
N.C.
N.C.
Q OUT
Q OUT
N.C.
N.C.
GND1
V+
IN+
IN-
N.C.
LE
N.C.
V-
__________________________________________________________Pin Configurations
19-2398; Rev 1; 7/93
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-55°C to +125°C
PIN-PACKAGE*
16 Plastic DIP
16 Narrow SO
16 CERDIP
10 TO-100
Dice**
16 Plastic DIP
16 Narrow SO
16 CERDIP
10 TO-100
MAX9685CPE
MAX9685CSE
MAX9685CJ E
MAX9685CTW
MAX9685C/D
MAX9685EPE
MAX9685ESE
MAX9685MJ E
MAX9685MTW