TEXAS INSTRUMENTS SN54F245, SN74F245 Technical data

SN54F245, SN74F245

OPERATION

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS010A – MARCH 1987 – REVISED OCT OBER 1993

• 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 ...J PACKAGE

SN74F245 . . . DB, DW, OR N PACKAGE

A3 A4 A5 A6 A7

(TOP VIEW)

DIR

8 9

GND

SN54F245 . . . FK PACKAGE

(TOP VIEW)

A2A1DIR

3212019

4 5 6 7 8

910 11 12 13

20 19 18 17 16 15 14 13 12 11

V OE B1 B2 B3 B4 B5 B6 B7 B8

18 17 16 15 14

B1 B2 B3 B4 B5

FUNCTION TABLE

INPUTS

OE DIR

L L B data to A bus L H A data to B bus

H X Isolation

GND

B6 OE

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

2–1

SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SDFS010A – MARCH 1987 – REVISED OCT OBER 1993

19 1

3 4 5 6 7 8 9

†

G3 3EN1[BA]

3EN2[AB]

17 16 15 14 13 12 11

logic diagram (positive logic)

DIR

B2 B3 B4 B5 B6 B7 B8

To Seven Other Channels

logic symbol

DIR

A2 A3 A4 A5 A6 A7 A8

†

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, V Input voltage range, 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 V

Current into any output in the low state: SN54F245 (A1 thru A8) 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54F245 –55°C to 125°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.

–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(except I/O ports) (see Note 1) –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

SN54F245 (B1 thru B8) 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F245 (A1 thru A8) 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F245 (B1 thru B8) 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F245 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

‡

2–2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54F245, SN74F245

UNIT

IOHHigh-level output current

IOLLow-level output current

PARAMETER

TEST CONDITIONS

UNIT

A1 thru A8

B1 thru B8

A1 thru A8

4.5 V

B1 thru B8

‡

5.5 V

2.7 V

‡

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS010A – MARCH 1987 – REVISED OCTOBER 1993

recommended operating conditions

SN54F245 SN74F245

MIN NOM MAX MIN NOM MAX

electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)

†

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.

Supply voltage 4.5 5 5.5 4.5 5 5.5 V High-level input voltage 2 2 V Low-level input voltage 0.8 0.8 V Input clamp current –18 –18 mA

Operating free-air temperature –55 125 0 70 °C

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V

= 4.5

Any output VCC = 4.75 V, IOH = –1 mA to – 3 mA 2.7

= 4.5

A and B DIR, OE A and B DIR, OE A and B DIR, OE A1 thru A8 B1 thru B8

= 5.5

= 5.5 V,

VCC = 5.5 V

IOH = – 1 mA 2.5 3.4 2.5 3.4 IOH = – 3 mA 2.4 3.3 2.4 3.3 IOH = – 12 mA 2 3.2 IOH = – 15 mA 2 3.1

IOL = 20 mA 0.3 0.5 IOL = 24 mA 0.35 0.5 IOL = 48 mA 0.38 0.55 IOL = 64 mA 0.42 0.55 VI = 5.5 V 1 1 VI = 7 V 0.1 0.1

= 0.5

Outputs high 70 90 70 90 Outputs low 95 120 95 120 Outputs disabled 85 110 85 110

A1 thru A8 –3 –3 B1 thru B8 –12 –15 A1 thru A8 20 24 B1 thru B8 48 64

SN54F245 SN74F245

MIN TYP†MAX MIN TYP†MAX

70 70 20 20

–0.65 –0.65

– 1.2 – 1.2

–60 –150 –60 –150

–100 –225 –100 –225

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–3

SN54F245, SN74F245

(

)

(

)

(INPUT)

(OUTPUT)

A or B

B or A

A or B

OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SDFS010A – MARCH 1987 – REVISED OCT OBER 1993

switching characteristics (see Note 2)

VCC = 5 V, CL = 50 pF,

PARAMETER

PLH

PHL

PZH

PZL

PHZ

t † NOTE 2: Load circuits and waveforms are shown in Section 1.

PLZ

For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

FROM INPUT

OUTPUT

RL = 500 Ω, TA = 25°C

′F245 SN54F245 SN74F245

MIN TYP MAX MIN MAX MIN MAX

1.7 3.8 6 1.2 7.5 1.7 7

1.7 4.2 6 1.2 7.5 1.7 7

2.2 4.9 7 1.7 9 2.2 8

2.7 5.6 8 2.2 10 2.7 9

2.2 4.6 6.5 1.7 9 2.2 7.5

1.2 4.6 6.5 1.2 10 1.2 7.5

VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500Ω, TA = MIN to MAX

†

UNIT

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PACKAGE OPTION ADDENDUM

www.ti.com

8-Jun-2005

PACKAGING INFORMATION

Orderable Device Status

(1)

Package

Type

Package Drawing

Pins Package

Qty

Eco Plan

85511012A ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC 8551101RA ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC

8551101SA ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC JM38510/34803B2A ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC JM38510/34803BRA ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC JM38510/34803BSA ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC

SN54F245J ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC

SN74F245DBLE OBSOLETE SSOP DB 20 TBD Call TI Call TI

SN74F245DBR ACTIVE SSOP DB 20 2000 Pb-Free

SN74F245DBRE4 ACTIVE SSOP DB 20 2000 Pb-Free

SN74F245DBRG4 ACTIVE SSOP DB 20 2000 Green (RoHS &

no Sb/Br)

SN74F245DW ACTIVE SOIC DW 20 25 Pb-Free

SN74F245DWE4 ACTIVE SOIC DW 20 25 Pb-Free

SN74F245DWR ACTIVE SOIC DW 20 2000 Green (RoHS &

no Sb/Br)

SN74F245DWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS &

no Sb/Br)

SN74F245N ACTIVE PDIP N 20 20 Pb-Free

SN74F245N3 OBSOLETE PDIP N 20 TBD Call TI Call TI

SN74F245NE4 ACTIVE PDIP N 20 20 Pb-Free

SN74F245NSR ACTIVE SO NS 20 2000 Pb-Free

SN74F245NSRE4 ACTIVE SO NS 20 2000 Pb-Free

SNJ54F245FK ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC

SNJ54F245J ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC

SNJ54F245W ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC

(1)

The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.

(RoHS)

(2)

Lead/Ball Finish MSL Peak Temp

CU NIPDAU Level-2-260C-1 YEAR/

Level-1-235C-UNLIM

CU NIPDAU Level-2-260C-1 YEAR/

Level-1-235C-UNLIM

CU NIPDAU Level-2-260C-1YEAR

CU NIPDAU Level-2-250C-1 YEAR/

Level-1-235C-UNLIM

CU NIPDAU Level-2-250C-1 YEAR/

Level-1-235C-UNLIM

CU NIPDAU Level-1-260C-UNLIM

CU NIPDAU Level-NC-NC-NC

CU NIPDAU Level-2-260C-1 YEAR/

Level-1-235C-UNLIM

CU NIPDAU Level-2-260C-1 YEAR/

Level-1-235C-UNLIM

(3)

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

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