mt89l85apr1 Zarlink Semiconductor, mt89l85apr1 Datasheet - Page 2

• Manufacturer Part Number: mt89l85apr1
• Description: 256 X 256 Channels 8 Tdm Streams At 2.048 Mbps 3.3 V Non-blocking Enhance Digital Switch Edx With Constant Delay Mode
• Manufacturer: Zarlink Semiconductor

Pin Description
PLCC
15-17
19-21
7-11
3-5
44
12
13
14
22
2
Pin #
STi3
STi4
STi5
STi6
STi7
V
C4i
F0i
48 SSOP
A0
A1
A2
DD
16-18
20-22
12,36
7-11
3-5
13
14
15
23
2
7
8
9
10
11
12
13
14
15
16
17
RESET Device Reset (5V tolerant input). This pin is only available for the 48-pin SSOP package.
A0-A5 Address 0 to 5 (Inputs). These lines provide the address to MT89L85 internal registers.
Name
STi0-
DTA
STi7
V
C4i
F0i
DS
DD
44 PIN PLCC
Data Acknowledgment (Open Drain Output). This active low output indicates that a data
bus transfer is complete. A pull-up resistor is required at this output.
ST-BUS Input 0 to 7 (Inputs). Serial data input streams. These streams have 32 channels at
data rates of 2.048 Mbit/s.
+3.3 Volt Power Supply.
This active low input puts the MT89L85 in its reset state. It clears the internal counters and
registers. All ST-BUS outputs are set to the high impedance state. This RESET pin must be
held low for a minimum of 100nsec to reset the device.
Frame Pulse (Input). This input accepts and automatically identifies frame synchronization
signals formatted according to different backplane specifications such as ST-BUS and GCI.
Clock (Input). 4.096 MHz serial clock for shifting data in and out of the data streams.
Data Strobe (Input). This is the input for the active high data strobe on the microprocessor
interface. This input operates with CS to enable the internal read and write generation.
29
39
38
37
36
35
34
33
32
31
30
Figure 2 - Pin Connections
STo3
STo4
STo5
STo6
STo7
V
D0
D1
D2
D3
D4
SS
Zarlink Semiconductor Inc.
MT89L85
2
Description
RESET
STi6
STi7
STi0
STi1
STi2
STi3
STi4
STi5
DTA
R/W
V
V
NC
NC
C4i
DS
F0i
A0
A1
A2
A3
A4
A5
DD
SS
(JEDEC MO-118, 300mil Wide)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
48 PIN SSOP
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
STo6
STo7
CSTo
ODE
STo0
STo1
STo2
NC
STo3
STo4
STo5
V
V
D0
D1
D2
D3
D4
NC
D5
D6
D7
CS
V
SS
DD
SS
Data Sheet