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CT1820-201-1 View Datasheet(PDF) - Aeroflex Corporation

Part Name
Description
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CT1820-201-1
Aeroflex
Aeroflex Corporation Aeroflex
CT1820-201-1 Datasheet PDF : 14 Pages
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ELECTRICAL CHARACTERISTICS – PIN ASSIGNMENTS AND LOADING con’t
In the following table, the symbols are defined as follows:
IIH= maximum input HIGH current with VIH = 2.5 volts
IIL = maximum input LOW current with VIL = 0.4 volts
IOH = maximum output HIGH current for VOH = 2.5 volts minimum
IOL = maximum output LOW current for VOL = 0.4 volts maximum
* Indicates use of an internal pull-up resistor
Pin No
Plug Flat
in Pack
33 40
Name
DEC RST
34 41 GROUND
35 42 OUTPUT INH
36 43 SERIAL DATA OUT
37 44 TAKE DATA
38 45 MRST
39 46 BROADCAST*
40 47 MODE CODE*
41 48 D6
42 49 D7
43 50 DATA SELECT 2
44 51 D5
45 52 D0
46 53 D1
47 54 D2
48 55 D3
49 56 LATCH DATA 2
50 57 D4
51 58 LOAD DATA 2
52 59 LATCH DATA 1
53
2 LOAD DATA 1
54
3 D13
55
4 D14
56
5 D15
-
1 NC
-
30 NC
-
31 NC
-
60 NC
CT1820
CT1820-2
Description
IIH IIL IOH IOL
(μA) (mA) (μA) (mA
IOL
(mA)
20 -0.4
A LOW on this input (for 1µs minimum) resets the decoder to a condition ready for
a new word, resets the COMM / DATA SYNC output LOW, and resets the VALID
WORD output HIGH.
Logic and Power Return.
20 -0.4
A LOW on this input holds output pins 25 and 26 LOW.
-400 4.0
4.0
The received serial data in NRZ format is available at this pin during
LOW TAKE DATA.
-400 4.0
4.0
A LOW on this output indicates data shifting during the receive cycle.
20 -0.4
A LOW on this input (for 1μs minimum) interrupts and clears the
transmit cycle, resets the FAIL SAFE, and also performs the same
functions as DEC RST.
-400 4.0
4.0
A HIGH on this output indicates reception of a valid COMMAND (or
STATUS) word containing all ONES in the address field.
-600 6.0
6.0
A LOW on this output indicates reception of a valid COMMAND (or
STATUS) word containing all ONES or all ZEROS in the sub-address
field.
20 -0.4 -1000 6.0 10.0
Part of 16 Bit TRI-STATE l/O
20 -0.4
20 -0.4 -1000 6.0 10.0
-0.4
-0.4 -1000 6.0 10.0
-0.4
20 -0.4
-0.4 -1000 6.0 10.0
A LOW on this input applies the contents of the SECOND RANK REC’V
REG to the D0-D7 I/O pins.
Part of 16 Bit TRI-STATE l/O
LSB of 16BIT TRI-STATE I/O
Part of 16 Bit TRI-STATE l/O
Part of 16 Bit TRI-STATE l/O
Part of 16 Bit TRI-STATE l/O
A HIGH on this input allows the l/O data on D0-D7 to appear at the
output of the FIRST RANK XMT REG. A LOW on this input holds the
register outputs in their last state.
Part of 16 Bit TRl-STATE l/O
A LOW on this input loads the D0-D7 data into the SECOND RANK XMT
REG. A HIGH on this input then locks out the data inputs to permit serial
shifting.
A HIGH on this input allows the l/O data on D8-D15 to appear at the
output of the FIRST RANK XMT REG. A LOW on this input holds the
register outputs in their last state.
A LOW on this input loads the D8-D15 data into the SECOND RANK
XMT REG. A HIGH on this input then locks out the data inputs to permit
serial shifting.
Part of 16 Bit TRl-STATE l/O.
OPTIONAL SERIAL INPUT.
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No Contact
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SCDCT1820 Rev F 4/10/08
5
Aeroflex Plainview
 

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