MAS9138 MAS, MAS9138 Datasheet - Page 2

• Manufacturer Part Number: MAS9138
• Description: ASYNCHRONOUS TO SYNCHRONOUS CONVERTER
• Manufacturer: MAS

PIN CONFIGURATION
Top marking: YYWW = Year Week, XXXXX.X = Lot Number,
PIN DESCRIPTION
XESR
PDIP 16
TMG
OSC
Pin name
TXC*
VSS
CL1
CL2
TSL
XESR
TMG
OSC
TXC
VSS
TSL
CL1
CL2
1
2
3
4
5
6
7
8
MAS9138N
PDIP
1
2
3
4
5
6
7
8
Pin no.
SO
1
2
3
4
5
6
7
8
16 VDD
12
11
15
14
13
10
I/O
9
O
G
I
I
I
I
I
I
RXC
XHST
XASY
RDI
RDO
TDO
TDI
Function
Timing select. 0 selects external sampling timing 16 x TXC from pin 2,
TMG. 1 selects internal sampling timing.
Timing. Square wave timing signal 16 x TXC (TSL = 0) or 128 x
TXCmax (TSL = 1).
Max f = 10 Mhz when VDD = 5v and 5MHz when VDD = 3.3v.
Oscillator. Output for crystal. If used, the crystal is connected between
pins 2 and 3.
Transmitter timing (MAS9138 only).
Synchronous square wave timing for transmitter. The transmitted data
output, TDO is synchronized to the rising edge of TXC. The duty cycle
of TXC has to be 50% +/- 5%.
Character length. The total character length including one start bit, one
stop bit and possible parity bit is selected with the CL1 and CL2
signals.
Extended signalling rate. The tolerance of the synchronous bit rate can
be:
XESR = 1 (basic signalling rate) TXC -2.5%...+1.0%
XESR = 0 (extended signalling rate) TXC -2.5%...2.3%
Ground
=ESD Indicator
XESR
SO16
TMG
OSC
TXC*
VSS
TSL
CL1
CL2
1
2
3
4
5
6
7
8
MAS9138SB/SD
12 April, 2006
DA9138.005
16 VDD
15
14
13
12
11
10
9
2 (10)
RXC
RDI
RDO
XHST
XASY
TDO
TDI