MAX9687

1.4ns Propagation Delay
0.5ns Latch Setup Time
2.0ns Latch-Enable Pulse Width
+5V, -5.2V Power Supplies
Pin-Compatible with AD9687, Am6687, SP9687
Available in Commercial, Extended-Industrial, and Military Temperature Ranges
Available in Narrow SO Package

High-Speed A/D Converters High-Speed Line Receivers Peak Detectors Threshold Detectors High-Speed Triggers

Supply Voltages..................................................................................±6V
Output Short-Circuit Duration (Note 1) ......................................Indefinite
Input Voltages....................................................................................±5V
Differential Input Voltages .................................................................3.5V
Output Current ................................................................................30mA
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C) .........................842mW
Narrow SO (derate 8.70mW/°C above +70°C) ...........................696mW
CERDIP (derate 10.00mW/°C above +70°C)...............................800mW
Operating Temperature Ranges
MAX9687C_ E.....................................................................0°C to +70°C
MAX9687E_ E .................................................................-40°C to +85°C
MAX9687MJE .................................................................-55°C to +125°C
Storage Temperature Range .........................................-55°C to +150°C
Lead Temperature (soldering, 10sec) ...........................................+300°C

Note 1: Continuous short-circuit protection is allowed on one comparator at a time up to case temperatures of +85°C and ambient temperatures of +30°C.

The MAX9687 is a dual, ultra-fast ECL comparator manufactured with a high-frequency bipolar process (fT = 6GHz) capable of very short propagation delays. This design maintains the excellent DC matching characteristics normally found only in slower comparators.

The MAX9687 is pin-compatible with the AD9687 and Am6687, but exceeds their AC characteristics.

The MAX9687 has differential inputs and complementary outputs that are fully compatible with ECL-logic levels. Output current levels are capable of driving 50½ terminated transmission lines. The ultra-fast operation makes signal processing possible at frequencies in excess of 600MHz.

A latch-enable (LE) function of MAX9687 is provided to allow the comparator to be used in a sample/hold or track/hold mode. The latch-enable inputs are designed to be driven from the complementary outputs of a standard ECL gate. When LE is high andLE is low, the comparator functions normally. When LE of MAX9687 is forced low and LE is high, the comparator outputs are locked in the logical states determined by the input conditions at the time of the latch 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 of MAX9687 can be left open.