Figure 1
AC Waveforms for Toggle Bit During Embedded Algorithm Operations
CE
t
OEH
WE
t
OES
OE
Data
D
0
-D
7
D6=Toggle
D6=Toggle
D6
Stop Toggle
D
0
-D
7
Valid
t
OE
Figure 2
AC Test Circuit
Current Source
I
OL
To Device Under Test
C
L
=
50 pF
I
OH
Current Source
Parameter
Input Pulse Level
Input Rise and Fall
V
Z
~ 1.5 V (Bipolar Supply)
Input and Output Timing Reference
Output Lead Capacitance
Typical
0 – 3.0
5
1.5
50
Units
V
ns
V
pF
Notes:
1) V
Z
is programmable from -2V to +7V. 2) I
OL
and I
OH
programmable from 0 to 16 mA. 3) Tester Impedance
Z
O
= 75Ω.
4)
V
Z
is typically the midpoint of V
OH
and V
OL
. 5) I
OL
and I
OH
are adjusted to simulate a typical
resistance load circuit. 6) ATE Tester includes jig capacitance.
Aeroflex Circuit Technology
9
SCD1667 REV A 4/28/97 Plainview NY (516) 694-6700
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
