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Details, datasheet, quote on part number:SN74F2245N
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| Part: | SN74F2245N |
| Category: | Logic => Transceivers => Standard Transceivers |
| Description: | ti SN74F2245, Octal Bus Transceivers With Series Damping Resistors |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download SN74F2245N datasheet File size : 86 kB |
| Request For quote: | Find where to buy SN74F2245N
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Datasheet text preview:
SN74F2245 25- OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SDFS099 MAY 1995
D D
3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Package Options Include Plastic Small-Outline (DB) Packages and Plastic 300-mil DIPs (N)
DB OR N PACKAGE (TOP VIEW)
description
The SN74F2245 is 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 disables the device so the buses are effectively isolated.
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
Both A and B outputs can sink up to 12 mA; 25- resistors are included in the lower output circuit to reduce overshoot and undershoot. The SN74F2245 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE INPUTS OE L L H DIR L H X OPERATION B data to A bus A data to B bus Isolation
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.
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.
Copyright © 1995, Texas Instruments Incorporated
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
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SN74F2245 25- OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SDFS099 MAY 1995
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
recommended operating conditions
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 Low-level output current Operating free-air temperature 0 4.5 2 0.8 18 3 12 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 VOH Any output VCC = 4.5 V, VCC = 4 5 V 4.5 VCC = 4.75 V, VOL II IIH§ IIL§ IOS¶ ICC Any output output A and B DIR and OE A and B DIR and OE A and B DIR and OE A and B 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, VCC = 5.5 V TEST CONDITIONS II = 18 mA IOH = 1 mA IOH = 3 mA IOH = 1 mA to 3 mA IOL = 1 mA IOL = 12 mA VI = 5.5 V VI = 7 V VI = 2 7 V 2.7 VI = 0 5 V 0.5 VO = 0 Outputs high Outputs low Outputs disabled 50 62 73 72 MIN 2.5 2.4 2.7 0.2 0.5 0.5 0.75 1 0.1 70 20 0.5 0.5 120 90 105 100 mA V mA µA mA mA TYP 3.4 3.3 V MAX 1.2 UNIT V
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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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN74F2245 25- OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SDFS099 MAY 1995
switching characteristics (see Figure 1)
VCC = 5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = 25°C MIN tPLH tPHL tPZH tPZL tPHZ tPLZ A or B or B or A or A or B or A or B or 2.5 3.1 2.4 3.6 2.3 2 TYP 3.9 4.6 4.8 6.6 4.3 4 MAX 5.5 6.6 7.3 10.6 6.3 5.8 VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX MIN 2.1 2.9 1.6 3 2 1.9 MAX 6.6 7.1 8.5 12 7.5 6.8 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.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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