Texas Instruments SN74FB1650PCA Datasheet

D

Compatible With IEEE Std 1 194.1-1991
(BTL)

D

TTL A Port, Backplane Transceiver Logic
(BTL) B Port

D

Open-Collector B-Port Outputs Sink
100 mA

D

BIAS VCC Minimizes Signal Distortion
During Live Insertion or Withdrawal

1AI4

1AO5

1AI5

98

99

100

1

NC

CC

CC

NC

2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

26

27

28

V

GND

1AO6

1AI6

1AO7

1AI7

GND

1AO8

1AI8

1AO9

1AI9

GND

2AO1

2AI1

2AO2

2AI2

GND

2AO3

2AI3

2AO4

2AI4

GND

V

1AO4

GND

96

97

30

29

SN74FB1650

18-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER

SCBS178L – AUGUST 1992 – REVISED SEPTEMBER 1999

D

High-Impedance State During Power Up
and Power Down

D

B-Port Biasing Network Preconditions the
Connector and PC Trace to the BTL
High-Level Voltage

D

TTL Input Structures Incorporate Active
Clamping to Aid in Line Termination

D

Packaged in Plastic High-Power
Low-Profile Quad Flatpack

PCA PACKAGE

(TOP VIEW)

CC

1AO3

1AI3

94

95

32

31

1AI2

92

93

34

33

GND

1AO2

91

35

1AO1

1AI1

89

90

37

36

CC

88

38

1OEA

1OEA

86

87

40

39

1LEBA

1CLKBA

84

85

42

41

1CLKAB

83

43

1LEAB

1OEB

81

82

45

44

1OEB

BG GND

79

80

47

46

GND

BG V

77

78

49

48

1B1

76

75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51

50

1B2
GND
1B3
1B4
GND
1B5
1B6
GND
1B7
1B8
GND
1B9
NC
2B1
GND
2B2
2B3
GND
2B4
2B5
GND
2B6
2B7
GND
2B8

2AI5

2AO5

2AO6

NC – No internal connection

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

CC

2AI8

2AI6

2AI7

GND

2AO7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2AO8

GND

2AI9

2AO9

V V

2OEA

2OEA

2LEBA

2LEAB

2CLKBA

2CLKAB

CC

NC

2B9

2OEB

GND

2OEB

BIAS V

Copyright  1999, Texas Instruments Incorporated

1

SN74FB1650

FUNCTION

B-bus isolation

A-bus isolation

FUNCTION

18-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER

SCBS178L – AUGUST 1992 – REVISED SEPTEMBER 1999

description

The SN74FB1650 device contains two 9-bit transceivers designed to translate signals between TTL and
backplane transceiver-logic (BTL) environments. It is designed specifically to be compatible with
IEEE Std 1 194.1-1991.

The B port operates at BTL-signal levels. The open-collector B ports are specified to sink 100 mA. Two output
enables (OEB and OEB
the B port is turned off.

) are provided for the B outputs. When OEB is low, OEB is high, or VCC is less than 2.1 V ,

The A port operates at TTL-signal levels. The A outputs reflect the inverse of the data at the B
A-port output enable (OEA) is high. When OEA is low or when V

is less than 2.1 V , the A outputs are in the

CC

high-impedance state.
BIAS V

establishes a voltage between 1.62 V and 2.1 V on the BTL outputs when VCC is not connected.

CC

BG VCC and BG GND are the supply inputs for the bias generator.
The SN74FB1650 is characterized for operation from 0°C to 70°C.

Function Tables

TRANSCEIVER

INPUTS

OEA OEA OEB OEB

X X H L A data to B bus
L H X X B data to A bus
L H H L A data to B bus, B data to A bus
X X L X
X XXH
H X X X
X L X X

STORAGE MODE

INPUTS

LE CLK

H X Transparent

L ↑ Store data
L L Storage

port when the

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

SN74FB1650

18-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER

SCBS178L – AUGUST 1992 – REVISED SEPTEMBER 1999

1OEB

1OEB

1CLKAB

1LEAB

1LEBA

1CLKBA

1OEA
1OEA

1AI1

1AO1

81

80

83

82

85

84

87
86

90

89

C1

1D
C2

1D
C2

C1

76

1B1

To Eight Other Channels

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, VCC, BIAS VCC, BG VCC –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, VI: Except B port –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B port –1.2 V to 3.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any B
Voltage range applied to any output in the high state, VO –0.5 V to V

Input clamp current, IIK: Except B port –40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Current applied to any single output in the low state, IO: A port 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance, θ
Storage temperature range, T

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: The package thermal impedance is calculated in accordance with JESD 51.

output in the disabled or power-off state, VO –0.5 V to 3.5 V. . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B port –18 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B

port 200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(see Note 1) 22°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

JA

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

†

CC

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3