MT8809 Data Sheet
3
Zarlink Semiconductor Inc.
Functional Description
The MT8809 is an analog switch matrix with an array size of 8 x 8. The switch array is arranged such that there are
8 columns by 8 rows. The columns are referred to as the Y inputs/outputs and the rows are the X inputs/outputs.
The crosspoint analog switch array will interconnect any X I/O with any Y I/O when turned on and provide a high
degree of isolation when turned off. The control memory consists of a 64 bit write only RAM in which the bits are
selected by the address inputs (AY0-AY2, AX0-AX2). Data is presented to the memory on the DATA input. Data is
asynchronously written into memory whenever both the CS
(Chip Select) and STROBE inputs are low and are
latched on the rising edge of STROBE
. A logical “1” written into a memory cell turns the corresponding crosspoint
switch on and a logical “0” turns the crosspoint off. Only the crosspoint switches corresponding to the addressed
memory location are altered when data is written into memory. The remaining switches retain their previous states.
Any combination of X and Y inputs/outputs can be interconnected by establishing appropriate patterns in the
control memory. A logical “0” on the RESET
input will asynchronously return all memory locations to logical “0”
turning off all crosspoint switches regardless of whether CS
is high or low.
Address Decode
The six address inputs along with the STROBE and CS (Chip Select) are logically ANDed to form an enable signal
for the resettable transparent latches. The DATA input is buffered and is used as the input to all latches. To write to
a location, RESET
must be high and CS must go low while the address and data are set up. Then the STROBE
input is set low and then high causing the data to be latched. The data can be changed while STROBE is low,
however, the corresponding switch will turn on and off in accordance with the DATA input. DATA must be stable on
the rising edge of STROBE
in order for correct data to be written to the latch.
MT8809 Data Sheet
4
Zarlink Semiconductor Inc.
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
DC Electrical Characteristics are over recommended temperature range.
Typical figures are at 25
°C and are for design aid only; not guaranteed and not subject to production testing.
Absolute Maximum Ratings*- Voltages are with respect to V
SS
unless otherwise stated.
Parameter Symbol Min. Max. Units
1 Supply Voltage V
DD
V
SS
-0.3
-0.3
15.0
V
DD
+0.3
V
V
2 Analog Input Voltage V
INA
-0.3 V
DD
+0.3 V
3 Digital Input Voltage V
IN
V
SS
-0.3 V
DD
+0.3 V
4 Current on any I/O Pin I ±15 mA
5 Storage Temperature T
S
-65 +150 °C
6 Package Power Dissipation PLASTIC DIP P
D
0.6 W
Recommended Operating Conditions
- Voltages are with respect to V
SS
unless otherwise stated.
Characteristics Sym. Min. Typ. Max. Units Test Conditions
1 Operating Temperature T
O
-40 25 85 °C
2 Supply Voltage V
DD
4.5 13.2 V
3 Analog Input Voltage V
INA
V
SS
V
DD
V
4 Digital Input Voltage V
IN
V
SS
V
DD
V
DC Electrical Characteristics
- Voltages are with respect to V
SS
= 0 V, V
DD
= 12 V unless otherwise stated.
Characteristics Sym. Min. Typ.
Max. Units Test Conditions
1 Quiescent Supply Current I
DD
1 100 µA All digital inputs at V
IN
= V
SS
V
DD
except RESET = V
DD.
120 400 µA All digital inputs at V
IN
= V
SS
or V
DD
except RESET = V
SS.
0.5 1.6 mA All digital inputs at V
IN
= 2.4 V,
V
DD
= 5.0 V
5 15 mA All digital inputs at V
IN
= 3.4 V
2 Off-state Leakage Current
(See G.9 in Appendix)
I
OFF
±1 ±500 nA IV
Xi
- V
Yj
I = V
DD
- V
SS
See Appendix, Fig. A.1
3 Input Logic “0” level V
IL
0.8 V
4 Input Logic “1” level V
IH
3.0 V
6 Input Leakage (digital pins) I
LEAK
0.1 10 µA All digital inputs at V
IN
= V
SS
or V
DD;
RESET = V
DD
MT8809 Data Sheet
5
Zarlink Semiconductor Inc.
Timing is over recommended temperature range. See Fig. 3 for control and I/O timing details.
Typical figures are at 25
°C and are for design aid only; not guaranteed and not subject to production testing.
Crosstalk measurements are for Plastic DIPS only, crosstalk values for PLCC packages are approximately 5 dB better.
DC Electrical Characteristics- Switch Resistance - V
DC
is the external DC offset applied at the analog I/O pins.
Characteristics Sym. 25°C70°C85°C Units Test Conditions
Typ. Max. Typ. Max. Typ. Max.
1 On-state V
DD
=12 V
ResistanceV
DD
=10V
V
DD
= 5V
(See G.1, G.2, G.3 in
Appendix)
R
ON
45
55
120
65
75
185
75
85
215
80
90
225
V
SS
= 0 V,V
DC
= V
DD
/2,
IV
Xi
-V
Yj
I = 0.4 V
See Appendix, Fig. A.2
2 Difference in on-state
resistance between
two switches
(See G.4 in Appendix)
R
O
N
510 10 10 V
DD
= 12 V, V
SS
= 0,
V
DC
= V
DD
/2,
IV
Xi
-V
Yj
I = 0.4 V
See Appendix, Fig. A.2
AC Electrical Characteristics
- Crosspoint Performance- V
DC
is the external DC offset at the analog I/O pins. Voltages are
with respect to V
DD
= 5 V, V
DC
= 0 V, V
SS
= -7 V, unless otherwise stated.
Characteristics Sym. Min. Typ.
Max. Units Test Conditions
1 Switch I/O Capacitance C
S
20 pF f = 1 MHz
2 Feedthrough Capacitance C
F
0.2 pF f = 1 MHz
3 Frequency Response
Channel “ON”
20LOG(V
OUT
/V
Xi
)=-3 dB
F
3dB
45 MHz Switch is “ON”; V
INA
= 2 Vpp
sinewave; R
L
= 1 k
See Appendix, Fig. A.3
4 Total Harmonic Distortion
(See G.5, G.6 in Appendix)
THD 0.01 % Switch is “ON”; V
INA
= 2 Vpp
sinewave f = 1 kHz; R
L
= 1 k
5 Feedthrough
Channel “OFF”
Feed.=20LOG (V
OUT
/V
Xi
)
(See G.8 in Appendix)
FDT -95 dB All Switches “OFF”; V
INA
=
2Vpp sinewave f = 1 kHz;
R
L
= 1 k.
See Appendix, Fig. A.4
6 Crosstalk between any two
channels for switches Xi-Yi and
Xj-Yj.
Xtalk=20LOG (V
Yj
/V
Xi
).
(See G.7 in Appendix).
X
talk
-45 dB V
INA
= 2Vpp sinewave
f = 10 MHz; R
L
= 75 .
-90 dB V
INA
= 2Vpp sinewave
f = 10kHz; R
L
= 600 .
-85 dB V
INA
=2Vpp sinewave
f = 10 kHz; R
L
= 1 k.
-80 dB V
INA
= 2Vpp sinewave
f = 1 kHz; R
L
= 10 k.
Refer to Appendix, Fig. A.5
for test circuit.
7 Propagation delay through
switch
t
PS
30 ns R
L
= 1 k; C
L
= 50 pF

MT8809AP1

Mfr. #:
Manufacturer:
Microchip / Microsemi
Description:
Analog & Digital Crosspoint ICs Pb Free 8 X 8 Analog Crosspoint
Lifecycle:
New from this manufacturer.
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