BUS TRANSCEIVERS. SN74F245 Datasheet

SN74F245 TRANSCEIVERS. Datasheet pdf. Equivalent

SN74F245 Datasheet
Recommendation SN74F245 Datasheet
Part SN74F245
Description OCTAL BUS TRANSCEIVERS
Feature SN74F245; • 3-State Outputs Drive Bus Lines Directly • Package Options Include Plastic Small-Outline (SOIC) an.
Manufacture etcTI
Datasheet
Download SN74F245 Datasheet




Texas Instruments SN74F245
3-State Outputs Drive Bus Lines Directly
Package Options Include Plastic
Small-Outline (SOIC) and Shrink
Small-Outline (SSOP) Packages, Ceramic
Chip Carriers, and Plastic and Ceramic
DIPs
description
These octal bus transceivers are designed for
asynchronous communication between data
buses. The devices transmit data from the A bus
to the B bus or from the B bus to the A bus
depending upon the logic level at the
direction-control (DIR) input. The output enable
(OE) input can be used to disable the device so the
buses are effectively isolated.
The SN74F245 is available in TI’s shrink
small-outline package (DB), which provides the
same I/O pin count and functionality of standard
small-outline packages in less than half the
printed-circuit-board area.
The SN54F245 is characterized for operation over
the full military temperature range of – 55°C to
125°C. The SN74F245 is characterized for
operation from 0°C to 70°C.
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
SN54F245 . . . J PACKAGE
SN74F245 . . . DB, DW, OR N PACKAGE
(TOP VIEW)
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
SN54F245 . . . FK PACKAGE
(TOP VIEW)
A3
3 2 1 20 19
4 18
B1
A4 5
17 B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
FUNCTION TABLE
INPUTS
OE DIR
OPERATION
LL
B data to A bus
LH
A data to B bus
HX
Isolation
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
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Texas Instruments SN74F245
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
logic symbol
logic diagram (positive logic)
19
OE
1
DIR
G3
3EN1[BA]
3EN2[AB]
DIR 1
19
OE
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
1
2
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
B8
2
A1
18 B1
To Seven Other Channels
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range, VI (except I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 1.2 V to 7 V
Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA to 5 mA
Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC
Current into any output in the low state: SN54F245 (A1 thru A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
SN54F245 (B1 thru B8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74F245 (A1 thru A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA
SN74F245 (B1 thru B8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54F245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74F245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
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 input voltage ratings may be exceeded provided the input current ratings are observed.
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POST OFFICE BOX 655303 DALLAS, TEXAS 75265



Texas Instruments SN74F245
recommended operating conditions
VCC
VIH
VIL
IIK
IOH
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
IOL Low-level output current
TA Operating free-air temperature
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
A1 thru A8
B1 thru B8
A1 thru A8
B1 thru B8
SN54F245
MIN NOM MAX
4.5 5 5.5
2
0.8
– 18
–3
– 12
20
48
– 55 125
SN74F245
MIN NOM MAX
4.5 5 5.5
2
0.8
– 18
–3
– 15
24
64
0 70
UNIT
V
V
V
mA
mA
mA
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F245
MIN TYP† MAX
SN74F245
MIN TYP† MAX
VIK
A1 thru A8
VOH B1 thru B8
Any output
VOL
A1 thru A8
B1 thru B8
A and B
II DIR, OE
A and B
IIH‡ DIR, OE
VCC = 4.5 V,
VCC = 4.5 V
VCC = 4.5 V
VCC = 4.75 V,
VCC = 4.5 V
VCC = 4.5 V
VCC = 5.5 V
VCC = 5.5 V,
II = – 18 mA
IOH = – 1 mA
IOH = – 3 mA
IOH = – 12 mA
IOH = – 15 mA
IOH = – 1 mA to – 3 mA
IOL = 20 mA
IOL = 24 mA
IOL = 48 mA
IOL = 64 mA
VI = 5.5 V
VI = 7 V
VI = 2.7 V
– 1.2
2.5 3.4
2.4 3.3
2 3.2
0.3 0.5
0.38 0.55
1
0.1
70
20
– 1.2
2.5 3.4
2.4 3.3
2 3.1
2.7
0.35 0.5
0.42 0.55
1
0.1
70
20
A and B
IIL‡ DIR, OE
VCC = 5.5 V,
VI = 0.5 V
– 0.65
– 1.2
– 0.65
– 1.2
IOS§
A1 thru A8
B1 thru B8
VCC = 5.5 V,
VO = 0
– 60
– 100
– 150 – 60
– 225 – 100
– 150
– 225
Outputs high
70 90
70 90
ICC
VCC = 5.5 V
Outputs low
95 120
95
Outputs disabled
85 110
85
† All typical values are at VCC = 5 V, TA = 25°C.
‡ For I/O ports, the parameters IIH and IIL include the off-state output current.
§ Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
120
110
UNIT
V
V
V
mA
µA
mA
mA
mA
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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