M3488
November 1994
256 x 256 DIGITAL SWITCHING MATRIX
PREL IMINARY DATA
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
.
256 INPUT AND 256 OUTPUT CHANNEL
CMOS DIGITAL SWITCHING MATRIX COM-
PATIBLE WITH M088
.
BUILDING BLOCK DESIGNED FOR LARGE
CAPACITY ELECTRONIC EXCHANGES, SUB-
SYSTEMS AND PABX
.
NO EXTRA PIN NEEDED FOR NOT-BLOCK-
ING SINGLE STAGE AND HIGHER CAPACITY
SYNTHESIS BLOCKS (512 or 1024 channels)
.
EUROPEAN TELEPHONE STANDARD COM-
PATIBLE (32 serial channels per frame)
.
PCM INPUTS AND OUTPUTS MUTUALLY
COMPATIBLE
.
ACTUAL INPUT-OUTPUT CHANNEL CON-
NECTIONS STORED AND MODIFIED VIA AN
ON CHIP 8-BIT PARALLEL MICROPROCES-
SOR INTERFACE
.
TYPICAL BIT RATE : 2Mbit/s
.
TYPICAL SYNCHRONIZATION RATE : 8KHz
(time frame is 125
s)
.
5V P0WER SUPPLY
.
CMOS & TTL INPUT/OUTPUT LEVELS COM-
PATIBLE
.
HIGH DENSITY ADVANCED 1.2
m HCMOS3
PROCESS
Main instructions controlled by the microproc-
essor interface
.
CHANNEL CONNECTION/DISCONNECTION
.
OUTPUT CHANNEL DISCONNECTION
.
INSERTION OF A BYTE ON A PCM OUTPUT
CHANNEL/DISCONNECTION
.
TRANSFER TO THE MICROPROCESSOR OF
A SINGLE PCM OUTPUT CHANNEL SAMPLE
.
TRANSFER TO THE MICROPROCESSOR OF
A SINGLE OUTPUT CHANNEL CONTROL
WORD
.
TRANSFER TO THE MICROPROCESSOR OF
A SELECTED 0 CHANNEL PCM INPUT DATA
DIP40
PQFP44
ORDERING NUMBERS:
M3488B1
M3488Q1
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Test Conditions
Unit
V
CC
Supply Voltage
-0.3 to 7
V
V
I
Input Voltage
-0.3 to V
CC
+0.3
V
V
O
Off State Output Voltage
-0.3 to V
CC
+0.3
V
I
O
Current at Digital Outputs
30
mA
P
tot
Total Package Power Dissipation
1.5
W
T
stg
Storage Temperature Range
-65 to 150
C
T
op
Operating Temperature Range
0 to 70
C
Stresses above those l isted under " Absolute Maximum Ratings" may cause permanent damage to the devi ce. This is a stress
rati ngs onl y and functional operation of the device at these or any other conditions above those indicated in the operating con-
di tions of this specificati on is not implied. Exposure to absolute maximum rating condi tio ns for extended periods may affect devi ce
rel ia bili ty.
1/18
PQFP44
PIN CONNECTIONS (Top views)
DIP40
EXCHANGE NETWORKS APPLICATIONS
256 PCM links network (160 or 192 DSM) : the 32 x 32 link module shown on the next page.
2048 PCM links network (1792 or 2048 DSM) : the 256 x 256 link network is shown above.
1
2
3
5
6
4
7
8
9
10
17
11
18
19
20
21
22
44
43
42
41
39
40
38
37
36
35
34
28
27
26
24
23
25
33
32
31
29
30
SYNC
CLOCK
INP PCM7
VCC
INP PCM0
N.C.
D7
D6
D5
N.C.
D4
D3
D2
D1
D0
DR
N.C.
OUT
PCM7
RD
VSS
C/D
A1
A2
S2
S1
N.C.
WR
CS1
RESET
CS2
D93TL040A
12
13
14
15
16
INP PCM6
INP PCM5
INP PCM4
INP PCM3
INP PCM2
INP PCM1
OUT
PCM6
OUT
PCM5
OUT
PCM4
N.C.
OUT
PCM3
OUT
PCM2
OUT
PCM1
OUT
PCM0
M3488
2/18
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
4.75 to 5.25
V
V
i
Input Voltage
0 to 5.25
V
V
O
Off State Input Voltage
0 to 5.25
V
CLOCK
Freq.
Input Clock Frequency
4.096
MHz
SYNC Freq. Input Synchronization Frequency
8
KHz
T
op
Operating Temperature
0 to 70
C
CAPACITANCES (measurement freq. = 1MHz; T
op
= 0 to 70
C; unused pins tied to V
SS
)
Symbol
Parameter
Pins (*)
Min.
Typ.
Max.
Unit
C
I
Input Capacitance
6 to 15; 26 to 30; 32 to 36
5
pF
C
I/O
I/O Capacitance
20 to 24
15
pF
C
O
Output Capacitance
1 to 4; 17 to 19; 25; 37 to 40
10
pF
D.C. ELECTRICAL CHARACTERISTICS (T
amb
= 0 to 70
C, V
CC
= 5V
5%)
All D.C. characteristics are valid 250
s after V
CC
and clock have been applied.
Symbol
Parameter
Pins (*)
Test Condition
Min.
Typ.
Max.
Unit
V
ILC
Clock Input Low Level
6
-0.3
0.8
V
V
IHC
Clock Input High Level
6
2.4
V
CC
V
V
IL
Input Low Level
7 to 15
20 to 24
26 to 30
32 to 36
-0.3
0.8
V
V
IH
Input High Level
7 to 15
20 to 24
26 to 30
32 to 36
2
V
CC
V
V
OH
Output High Voltage (Level)
17 to 25
I
OH
= 5mA
2.4
V
I
OH
Output High Current
V
OH
= 2.4V
5
mA
V
OL
Output Low Voltage (Level)
1 to 4
37 to 40
17 to 25
I
OL
= 5mA
0.4
V
I
OL
Output Low Current
V
OL
= 0.4V
5
mA
I
IL
Input Leakage Current
6 to 15
26 to 30
32 to 36
V
IN
= 0 to V
CC
5
A
I
DL
Data Bus Leakage Current
17 to 24
V
IN
= 0 to V
CC
V
CC
applied; Pins 35
and 36 tied to V
CC
,
after Device Initialization
5
A
I
CC
Supply Current
16
Clock Freq. = 4.096MHz
15
30
mA
(*) T he pi n number i s referred to the DIP 40 ver sion.
M3488
5/18
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