SEMICONDUCTOR TECHNICAL DATA
The MC1650 and the MC1651 are very high speed comparators utilizing
differential amplifier inputs to sense analog signals above or below a reference
level. An output latch provides a unique sample-hold feature. The MC1650
provides high impedance Darlington inputs, while the MC1651 is a lower
impedance option, with higher input slew rate and higher speed capability.
The clock inputs (C and C ) operate from MECL III or MECL 10,000 digital
a
b
levels. When C is at a logic high level, Q0 will be at a logic high level provided
a
that V
V (V is more positive than V ). Q0 is the logic complement of Q0.
1
2 1 2
When the clock input goes to a low logic level, the outputs are latched in their
present state.
Assessment of the performance differences between the MC1650 and the
MC1651 may be based upon the relative behaviors shown in Figures 4 and 7.
L SUFFIX
CERAMIC PACKAGE
CASE 620–10
LOGIC DIAGRAM
V
V
6
5
1A
+
–
D
D
Q
Q
2 Q0
3 Q0
2A
PIN ASSIGNMENT
C
4
A
GND
1
2
3
4
5
16
15
14
13
12
11
10
9
GND
V
12
11
+
–
Q
1
Q
0
1B
Q
Q
14 Q1
15 Q1
V
2B
Q
1
Q
0
C
B
C
A
C
13
B
V
V
2A
1B
V
V
=
=
+5.0 V = PIN 7, 10
–5.2 V = PIN 8
CC
EE
6
7
V
V
2B
1A
GND = PIN 1, 16
V
V
CC
CC
V
8
NC
EE
•
•
P
= 330 mW typ/pkg (No Load)
= 3.5 ns typ (MC1650)
= 3.0 ns typ (MC1651)
D
t
pd
•
Input Slew Rate = 350 V/µs (MC1650)
= 500 V/µs (MC1651)
•
•
Differential Input Voltage: 5.0 V (–30°C to +85°C)
Common Mode Range:
–3.0 V to +2.5 V (–30°C to +85°C) (MC1651)
–2.5 V to +3.0 V (–30°C to +85°C) (MC1650)
•
•
Resolution:
Drives 50 Ω lines
20 mV (–30°C to +85°C)
Number at end of terminal denotes pin number for L package (Case 620).
TRUTH TABLE
C
H
V
, V
Q0
Q0
1
2
n + 1
H
n + 1
L
V
1
V
2
H
L
V
V
L
H
1
2
X
X
Q0
Q0
n
n
3/93
Motorola, Inc. 1996
REV 5
4–334