GC5910 TTL I/O Module

The GC5910 TTL I/O Module is the typical I/O stage utilized with the GC5050 product. The GC5910 interfaces to the GC5050 and can be configured as Input or Output. Additionally, the GC5910 has on-board terminators that are software controlled (On/Off).

A picture of the GC5910 is displayed in the figure below.

GC5910 TTL I/O Module Card

GC5910 TTL I/O Module Card

Architecture

The GC5910 employs 2 double-density FCT166245ET transceivers to provide up to 32 channels of bi-directional TTL level I/O. The module supports configurations of 8, 16, and 32 bi-directional channels. On-board register/MUX logic controls the path of data in both input and output modes of operation and determines the output state after a sequencer HALT. SIP sockets provide the optional installation of terminators; 180/390-ohm resistor networks are factory installed.

Programming

The GC5910 Module is controlled by its host, the GC5050, and provides the following programmable functions:

●     Global Output Reset

●     Tri-state Output on sequencer HALT

●     Hold Last Value output on sequencer HALT

●     Termination Enable/Disable

●     Enable/disable all 8 outputs in a group, four groups in total, in each vector step.

Block Diagram

A block diagram of the GC5910 is displayed in the figure below.

GC5910 Block Diagram

GC5910 Block Diagram

Function

The GC5910 TTL I/O Module interfaces GC5050 DIO boards to external equipment and UUTs that use standard TTL logic levels.

Control

Tri State – High impedance outputs can be enabled or disabled in groups of eight during vector execution. The high impedance output state supports the connection of DIO boards to a UUT bus up to 32 bits wide.

Retain Last Value – The output mode can be configured to either retain the last value on vector halt, or switch to high impedance.

Line Terminations – Terminators can be switched in or out under program control. 180/330 or 330/390 SIPs are standard. SIPs mount in sockets to accept other (user-supplied) termination values.

J5 I/O Connector (68-Pin to UUT)

The following table defines the GC5050 DIO to UUT I/O signals. This interface uses a 68-pin VHD connector.

Pin

Signal

Type

Pin

Signal

Type

Pin

Signal

Type

Pin

Signal

Type

1

IO0

I/O

18

IO17

I/O

35

GND

I/O

52

GND

P

2

IO1

I/O

19

IO18

I/O

36

GND

I/O

53

GND

P

3

IO2

I/O

20

IO19

I/O

37

GND

I/O

54

GND

P

4

IO3

I/O

21

IO20

I/O

38

GND

I/O

55

GND

P

5

IO4

I/O

22

IO21

I/O

39

GND

I/O

56

GND

P

6

IO5

I/O

23

IO22

I/O

40

GND

I/O

57

GND

P

7

IO6

I/O

24

IO23

I/O

41

GND

I/O

58

GND

P

8

IO7

I/O

25

IO24

I/O

42

GND

I/O

59

GND

P

9

IO8

I/O

26

IO25

I/O

43

GND

I/O

60

GND

P

10

IO9

I/O

27

IO26

I/O

44

GND

I/O

61

GND

P

11

IO10

I/O

28

IO27

I/O

45

GND

I/O

62

GND

P

12

IO11

I/O

29

IO28

I/O

46

GND

I/O

63

GND

P

13

IO12

I/O

30

IO29

I/O

47

GND

I/O

64

GND

P

14

IO13

I/O

31

IO30

I/O

48

GND

I/O

65

GND

P

15

IO14

I/O

32

IO31

I/O

49

GND

I/O

66

GND-

P

16

IO15

I/O

33

VCC

P

50

GND

I/O

67

VCC

P

17

IO16

I/O

34

GND

P

51

GND

I/O

68

GND

P

68-Pin UUT I/O Data Connector, J5

Notes:

●     Pin: Pin number

●     I/O: Input or Output

●     P: Power/GND

●     IO0 – IO31: Data Lines. Non-differential I/O Modules.

●     VCC – 5V or 3.3V (set by jumpers).

Specifications

 

Min

Typical

Max

I/O Channels Per Module

Configurable: 32, 16, or 8 bit

Terminations

Software Controlled On/Off Socketed 180/390, factory Installed

Type

74ALVC245

Output Level

High

2.0V

 

3.2V

Low

0.2V

 

0.55V

Output Current

 

 

±24mA

Input Level

High

2.0V

 

 

Low

 

 

0.8V

Power

5VDC

 

200mA

Propagation

Delay Output

1nSec

 

3nSec

Delay Input

1nSec

 

3nSec

Output Skew

 

1ns

 

Temperature Range

Operating

0°C

 

+50°C

Storage

-20°C

 

+70°C

Size

4.40 x 3.40 Inch

Weight

60g