CT2553 datasheet(3/36 Pages) AEROFLEX

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Aeroflex Circuit Technology

SCDCT2553 REV B 8/6/99 Plainview NY (516) 694-6700

GENERAL

The CT2553 is a complete MIL-STD-1553 bus

interface

unit

containing

dual

low-power

transceivers;

Bus

Controller

(BC),

Remote

Terminal (RTU), and Bus Monitor (MT) protocol

logic; 8K x 16-bit pseudo dual port RAM; and

memory management arbitration control circuitry.

The host processor interface consists of standard

control and interrupt signals, memory expansion

capability and non-multiplexed address and data

buses.

Control of the CT2553 is accomplished entirely

through the use of three internal registers and the

shared RAM. Transfers to and from the CT2553

are executed on a word-by-word basis ensuring

minimal wait time if contention occurs.

The

specific

mods

operation

(1553

BC/RTU/MT) is software programmable. Memory

is configured into unique control and data block

areas based on the 1553 mode of operation.

External registers are also supported by the

CT2553 for manipulation of user data. In addition,

the

CT2553

provides

dynamic,

online

and

software initiated self-test capabilities.

Values at nominal Power Supply Voltages unless otherwise specified

PARAMETER

VALUE

UNITS

Receiver

Differential Input Voltage

40 max

Vp-p

Differential Input Impedance

7 min

Ω

CMRR

40 min

Transmitter (Direct Coupled)

Differential Output Voltage

6.0 min, 9.0 max

Vp-p

Output Rise and Fall Times

100 min, 300 max

nsec

Output Offset Voltage

±90 max

Logic*

VIH

2.2 min

VIL

0.8 max

Clock

MHZ

Power Supplies

+5V (Logic)

+5±5%

-15VA (Channel A Transceiver)

-15±10%

-15VB (Channel B Transceiver)

-15±10%

+5VA (Channel A)

+5±5%

+5VB (Channel B)

+5±5%

Current Drain* (Total Package)

(TYP)/max

+5V (Idle)

(85)/170

-15V (Idle)

(45)/80

+5V (25% Duty Cycle)

(85)/170

-15V (25% Duty Cycle)

(80)/130

Temperature Range

Operating (Case)

−55 to +125

°C

Storage

−65 to +150

°C

Physical Characteristics

Size

78 pin DDIP

2.1 x 1.87 x 0.25

(53 x 47.5 x 6.4)

(mm)

82 pin flatpack

2.19 x 1.6 x 0.175

(55.6 x 40.6 x 4.34)

(mm)

* See Table 7 for pin loading characteristics.

Table 1 – CT2553 Specifications

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