M3493B2
June 1998
CMOS 12 X 8 CROSSPOINT WITH CONTROL MEMORY
.
LOW ON RESISTANCE
(typ. 60
at V
DD
= 10 V)
.
INTERNAL CONTROL LATCHES
.
ANALOGSIGNALSWING CAPABILITYEQUAL
TO POWER SUPPLY VOLTAGE APPLIED
.
LESS THAN 1 % TOTAL DISTORT. AT 0 dBm
.
LESS THAN 95 dB CROSS-TALK
AT 1 KHz 1 V
PP
.
VERY LOW POWER CONSUMPTION
.
PIN-TO-PIN COMPATIBLE WITH M093
DESCRIPTION
The M3493 contains a 12 x 8 array of crosspoint to-
gether with a 7 to 96 line decoder and latch circuits.
Anyoneof the 96 switches can be addressed by se-
lecting the appropriate 7 input bits. The selected
switch can be turned on or off by applying a logical
oneor zero to the data in and the strobe inputat logi-
DIP40
ORDERING NUMBER : M3493B2 (*)
(*) It substitutes the obsolete M3493B1.
cal one. A reset signal can be used to turn off all the
switches together when is switched at logical one.
M3493 is available in 40 lead dual in-line plastic
package.
BLOCK DIAGRAM
1/12
INPUT/OUTPUT DESCRIPTION
I/O
Symbol
Pin
Description
POWER
I
V
DD
40
Positive Power Supply
I
V
SS
20
Negative Power Supply
ADDRESS
I
AX0-AX3
4, 5, 22, 23
X Address Lines. These 4 pins are used to select one of the 12 rows of
switches. Refer to the truth table for legal address.
I
AY0-AY2
2, 24, 25
Y Address Lines. These 3 pins are used to select one of the 8 columns of
switches. Refer to the truth table for legal address.
CONTROL
I
DATA
38
This input determines if the selected switch will be turned on (closed) or off
(opened). If the pin is held high, the selected switch will be closed.
If the pin is held low, the switch will be opened.
I
STROBE
18
This pin enables whatever action is selected by the ADDRESS and DATA pins.
When the STROBE pin is held low, no switch openings or closings take place.
When the STROBE pin is held high, the switch addressed by the select lines
will be opened or closed (depending upon the state of the DATA pin)
I
RESET
3
Master Reset. This pin turns off (opens) all 96 switches. The states of the
above control lines are irreleant. This pin is active high.
DATA
I/O
X0-X11
8-13, 28-33
Analog Input/Outputs. These pins are connected to the Y0-Y7 pins in according
to the truth table.
I/O
Y0-Y7
1,15,17,19,21
35,37,39
Analog Input/Outputs. These pins are connected to the X0-X15 pins in
according to the truth table.
PIN CONNECTION (top view)
M3493B2
2/12
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
DD
DC supply Voltage
- 0.5, 14
V
V
IN
Input Voltage Range
- 0.5, V
DD
+ 0.5
V
P
tot
Power Dissipation
1
W
T
oper
Operating Temperature Range
0, + 70
o
C
T
stg
Storage Temperature Range
- 50, + 125
o
C
Stresses above those l is ted under "A bsolute Maximum Ratings" may cause per manent damage to t he devi ce. This is a st ress
r ating onl y and functional operation of the device at these or any ot her condit ions in exces s of those in dicat ed in t he operational
sections of thi s specification i s not implied. Exposure to absolute maximum rating condi ti ons f or extended peri ods may af fect
device rel iabili ty.
TRUTH TABLE
Address
Connections
AX0
AX1
AX2
AX3
AY0
AY1
AY2
0
1
0
1
0
1
0*
1*
0
1
0
1
0
1
0*
1*
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X0 - Y0
X1 - Y0
X2 - Y0
X3 - Y0
X4 - Y0
X5 - Y0
No connection
No connection
X6 - Y0
X7 - Y0
X8 - Y0
X9 - Y0
X10 - Y0
X11 - Y0
No connection
No connection
0
1
0
0
0
1
0
1
1
1
0
0
0
0
X0 - Y1
<0>
X11 - Y1
0
1
0
0
0
1
0
1
0
0
1
1
0
0
X0 - Y2
X11 - Y2
0
1
0
0
0
1
0
1
1
1
1
1
0
0
X0 - Y3
X11 - Y3
0
1
0
0
0
1
0
1
0
0
0
0
1
1
X0 - Y4
X11 - Y4
0
1
0
0
0
1
0
1
1
1
0
0
1
1
X0 - Y5
X11 - Y5
0
1
0
0
0
1
0
1
0
0
1
1
1
1
X0 - Y6
X11 - Y6
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
DD
Supply Voltage
10
V
T
oper
Operating Temperature
0, + 70
o
C
V
IN
(Logic Signal)
0, V
DD
V
M3493B2
3/12
STATIC ELECTRICAL CHARACTERISTICS (T
amb
= 0 to 70
o
C, V
DD
= 10V, unless otherwise specified
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
S
Supply Current
Reset = V
DD
1
mA
CROSSPOINT
On Resistance
V
IDC
= 4.75V, V
ODC
= 4.5V, See Figure 1
60
100
On Resistance Variation
10
20
Off-leakage *
All switches off V
OS
= V
IS
= 0 to V
DD
3
A
CONTROLS
V
IL
0.8
V
V
IH
2.4
V
Input Leakage *
V
IN
= 0 to V
DD
3
A
* The device is guaranteed with such limits up to 70
C. At 25
C these limits become
100nA.
DYNAMIC ELECTRICAL CHARACTERISTICS
(T
amb
= 25
o
C, C
L
= 50pF all input square wave rise and fall times = 10ns, V
DD
= 10V)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit Fig.
CROSSPOINT
t
PHL
,
t
PLH
Propagation Delay Time (switch on)
Signal Input to Output
R
H
= 1k
, V
IS
= 2V
PP
30
100
ns
2
Frequency Response (any switch on)
20 log (V
OS
/V
IS
) = -3dB
R
H
= 81
, V
IS
= 2V
PP
, C
L
= 3pF
50
MHz
Sine Wave Distortion
f
q
= 1kHz, R
H
= 0.6k
, V
IS
= 8V
PP
1
%
Feed Through (any switches off)
f
q
= 10kHz, R
H
= 1k
, V
IS
= 2V
PP
-80
dB
3
Frequency for Signal Crosstalk
Attenuation of 40dB
Attenuation of 110dB
R
H
= 1k
, V
IS
= 2V
PP
1
5
MHz
kHz
4
C
Capacitance
Xn to Ground
Vn to Ground
Feed Through
f
q
= 1MHz, V
IS
= 0.1V
PP
15
15
0.4
pF
C
Capacitance Logic Input to Ground
f
q
= 1MHz, V
IS
= 0.1V
PP
5
pF
CONTROLS (t
r
, t
f
= 10ns)
t
PSN
Propagation Delay Time Strobe to
Output (switch turn-on to high level)
R
L
= 1k
, C
L
= 50pF
150
200
ns
5
t
PZH
Data-in to Output (turn-on to high level)
150
200
ns
6
t
PAN
Address to Output (turn-on to high level)
150
200
ns
7
t
PSF
Propagation Delay Time Strobe to
Output (switch turn-off)
150
200
ns
5
t
PZL
Data-in to Output (turn-on to low level)
150
200
ns
6
t
PAF
Address to Output (turn-off)
150
200
ns
7
t
S
Set-up Time Data-in to Strobe
40
ns
5
10
t
H
Hold Time Data-in to Strobe
120
ns
5
10
t
O
Switching Frequency
1
MHz
t
W
Strobe Pulse Width
100
ns
10
t
WR
Reset Pulse Width
150
ns
9
t
PHZ
Reset Turn-off to Output Delay
150
200
ns
9
t
AS
Address Set-up Time Address to Strobe
120
ns
10
t
AH
Address Hold Time Address to Strobe
120
ns
10
Control Crosstalk Data-in, Address or
Strobe to Output
Square wave input, V
IN
= 3V,
R
L
= 10k
75
mV
8
M3493B2
4/12
TEST CIRCUITS
Figure 1 : R
ON
Measurement.
Figure 2 : Propagation Delay Time and Wave-
forms (signal input to signal output
switch ON).
Figure 3 : Off Isolation Measurement (Feed through).
M3493B2
5/12
PDF 
ZIP