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Part: SNJ54F245FK
Category:
Logic
-> Transceivers
-> Standard Transceivers
Description: ti SN54F245, Octal Bus Transceivers With 3-State Outputs
Company: Texas Instruments, Inc.
Datasheet: Download SNJ54F245FK datasheet File size : 214 kB
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SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 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
SN54F245 . . . J PACKAGE SN74F245 . . . DB, DW, OR N PACKAGE (TOP VIEW)
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.
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VC C OE B1 B2 B3 B4 B5 B6 B7 B8
SN54F245 . . . FK PACKAGE (TOP VIEW)
A2 A1 DIR VCC
A3 A4 A5 A6 A7
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
OE B1 B2 B3 B4 B5
FUNCTION TABLE INPUTS OE L L H DIR L H X OPERATION B data to A bus A data to B bus 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.
Copyright © 1993, Texas Instruments Incorporated
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A8 GND B8 B7 B6
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SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 1993
logic symbol
OE DIR 19 1 G3 3EN1[BA] 3EN2[AB] 1 2 A2 A3 A4 A5 A6 A7 A8 3 4 5 6 7 8 9 17 16 15 14 13 12 11 B2 B3 B4 B5 B6 B7 B8 18 B1
logic diagram (positive logic)
DIR 1 19
OE
A1
2
A1
2
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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SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 1993
recommended operating conditions
SN54F245 MIN VCC VIH VIL IIK IOH IOL TA Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current output current Low-level output current output current Operating free-air temperature A1 thru A8 B1 thru B8 A1 thru A8 B1 thru B8 55 4.5 2 0.8 18 3 12 20 48 125 0 NOM 5 MAX 5.5 SN74F245 MIN 4.5 2 0.8 18 3 15 24 64 70 NOM 5 MAX 5.5 UNIT V V V mA mA mA °C
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK A1 thru A8 thru A8 VOH B1 thru B8 thru B8 Any output A1 thru A8 thru A8 VOL B1 thru B8 thru B8 II IIH IIL IOS§ A and B DIR, OE A and B DIR, OE A and B DIR, OE A1 thru A8 B1 thru B8 VCC = 4 5 V 4.5 VCC = 5 5 V 5.5 VCC = 5 5 V 5.5 V, VCC = 5 5 V 5.5 V, VCC = 5 5 V 5.5 V, VCC = 4.5 V, VCC = 4 5 V 4.5 VCC = 4 5 V 4.5 VCC = 4.75 V, VCC = 4 5 V 4.5 TEST CONDITIONS CONDITIONS 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 2.7 VI = 0 5 V 0.5 VO = 0 Outputs high ICC VCC = 5.5 V Outputs low 60 100 70 95 0.3 0.38 0.5 0.35 0.55 0.42 1 0.1 70 20 0.65 1.2 150 225 90 120 60 100 70 95 0.55 1 0.1 70 20 0.65 1.2 150 225 90 120 110 mA mA µA mA mA 0.5 V MIN SN54F245 TYP MAX 1.2 2.5 2.4 2 3.4 3.3 3.2 2 2.7 3.1 2.5 2.4 3.4 3.3 V MIN SN74F245 TYP MAX 1.2 UNIT V
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.
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· DALLAS, TEXAS 75265
23
SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 1993
switching characteristics (see Note 2)
VCC = 5 V, CL = 50 pF, RL = 500 , TA = 25°C F245 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ A or B or B or A or A or B or A or B or 1.7 1.7 2.2 2.7 2.2 1.2 TYP 3.8 4.2 4.9 5.6 4.6 4.6 MAX 6 6 7 8 6.5 6.5 VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 , TA = MIN to MAX SN54F245 MIN 1.2 1.2 1.7 2.2 1.7 1.2 MAX 7.5 7.5 9 10 9 10 SN74F245 MIN 1.7 1.7 2.2 2.7 2.2 1.2 MAX 7 7 8 9 7.5 7.5 ns ns ns
PARAMETER
FROM (INPUT)
TO (OUTPUT)
UNIT
OE OE
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 2: Load circuits and waveforms are shown in Section 1.
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IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof.
Copyright © 1998, Texas Instruments Incorporated
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