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CT1820-2-201-1 View Datasheet(PDF) - Aeroflex Corporation

Part Name
Description
Manufacturer
CT1820-2-201-1
Aeroflex
Aeroflex Corporation Aeroflex
CT1820-2-201-1 Datasheet PDF : 14 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
ELECTRICAL CHARACTERISTICS – PIN ASSIGNMENTS AND LOADING
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
1
6
2
7
3
8
4
9
5
10
6
11
7
12
8
13
9
14
10 15
11 16
12 17
13 18
14 19
15 20
16 21
17 22
18 23
19 24
20 25
21 26
22 27
23 28
24 29
25 32
26 33
27 34
28 35
29 36
30 37
31 38
32 39
Name
VCC
D8
D9
D10
D11
D12
DATA SELECT 1
A3*
A2*
A1*
GROUND
A4*
A0*
VALID WORD
FAIL SAFE
COMM / DATA SYNC
CLOCK IN
CLOCK OUT
S/T SELECT
CASE
DATA IN
DATA IN
ENC ENA
SYNC SEL
DATA OUT
DATA OUT
SEND DATA
ESC OUT
XTAL
+5V (OSC/CLOCK)
DSC OUT
RT ENABLE
CT1820
CT1820-2
Description
IIH IIL IOH IOL
(μA) (mA) (μA) (mA
IOL
(mA)
--
--
-
+5V Power Input
20 -0.4 -1000 6.0 10.0
Part of 16 Bit TRI-STATE l/O
20 -0.4
20 -0.4
A LOW on this input applies the contents of the SECOND RANK REC’V
REG to the D8-D15 I/O pins
Part of 5 Bit ADDRESS INPUT
20 -0.4
-400 4.0
4.0
-400 4.0
4.0
-400 4.0
4.0
+100 +0.1
-1000 1.0
1.0
20 -0.4
20 -0.4
20 -0.4
20 -0.4
20 -0.4
-400 4.0
4.0
-400 4.0
4.0
-400 4.0
4.0
-1000 1.2
1.2
-1000 1.2
1.2
-400 4.0
4.0
Logic and power return
MSB of 5 Bit ADDRESS INPUT
LSB of 5 Bit ADDRESS INPUT
A LOW on this output indicates receipt of avalid word
A HIGH on this output indicates termination of a transmitted message
that exceeds 768μs.
A HIGH on this output indicates COMMAND (or STATUS) word
reception. A LOW indicates DATA word reception.
Input for 12MHz clock (20pf load).
Output of OSCILLATOR AND CLOCK DRIVER.
A HIGH on this input sets the unit in the self test mode.
CASE CONNECTION
A HIGH on this input represents a positive state on the bus.
A HIGH on this input represents a negative state on the bus. (Pins 21
and 22 must both be high when the bus is inactive.)
A LOW on this input initiates a transmit cycle.
Actuates COMMAND (or STATUS) sync for an input LOW and DATA
sync for an input HIGH.
A HIGH on this output produces a positive state on the bus.
A HIGH on this output produces a negative state on the bus.
A HlGH on this output indicates data shifting during the transmit cycle.
LOW to HIGH transitions on thls output during HIGH SEND DATA cause
the transmit cycle data shifting to occur.
A 12MHz (parallel resonant) crystal is connected between this pin and
ground.
+5V power for OSCILLATOR AND CLOCK POWER DRIVER.
LOW to HIGH transitions on this output during LOW TAKE DATA cause
receive cycle data shifting to occur.
A HIGH on this output indicates reception of a valid COMMAND (or
STATUS) word containing the terminalís address. It also resets the FAIL
SAFE.
SCDCT1820 Rev F 4/10/08
4
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