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Part: SNJ54F240J
Category:
Logic
-> Buffers/Drivers
-> Inverting Buffers and Drivers
Description: ti SN54F240, Octal Buffers/drivers With 3-State Outputs
Company: Texas Instruments, Inc.
Datasheet: Download SNJ54F240J datasheet File size : 214 kB
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Datasheet text preview:
SN54F240, SN74F240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SDFS061A D2932, MARCH 1987 REVISED OCTOBER 1993
· ·
3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Package Options Include Plastic Small-Outline (SOIC) and Shrink Small-Outline (SSOP) Packages, Ceramic Chip Carriers, and Plastic and Ceramic DIPs
SN54F240 . . . J PACKAGE SN74F240 . . . DB, DW, OR N PACKAGE (TOP VIEW)
description
These octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. Taken together with the F241 and F244, these devices provide the choice of selected combinations of inverting and noninverting outputs, symmetrical OE (active-low output-enable) inputs, and complementary OE and OE inputs. The F240 is organized as two 4-bit buffers/line drivers with separate output enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. The SN74F240 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 SN54F240 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74F240 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each buffer) INPUTS OE L L H A H L X OUTPUT Y L H Z
1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1
SN54F240 . . . FK PACKAGE (TOP VIEW)
2Y4 1A1 1OE VCC
1A2 2Y3 1A3 2Y2 1A4
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
2OE 1Y1 2A4 1Y2 2A3 1Y3
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.
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2Y1 GND 2A1 1Y4 2A2
Copyright © 1993, Texas Instruments Incorporated
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SN54F240, SN74F240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SDFS061A D2932, MARCH 1987 REVISED OCTOBER 1993
logic symbol
1OE 1 EN 18 16 14 12
logic diagram (positive logic)
1 1OE 18
1A1 1A2 1A3 1A4
2 4 6 8
2 1Y1 1Y2 1Y3 1Y4 6 1A3 1A2 4 1A1
1Y1
16
1Y2
14 1Y3 12 1Y4
2OE
19
EN 8 9 7 5 3 1A4 2Y1 2Y2 2Y3 2Y4 11 2OE 19
2A1 2A2 2A3 2A4
11 13 15 17
9 2Y1 7 2Y2 5 2Y3 3
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2A1 13
2A2
15 2A3 17
2A4
2Y4
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 (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: SN54F240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA SN74F240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range: SN54F240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74F240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
SN54F240, SN74F240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SDFS061A D2932, MARCH 1987 REVISED OCTOBER 1993
recommended operating conditions
SN54F240 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 55 4.5 2 0.8 18 12 48 125 0 NOM 5 MAX 5.5 SN74F240 MIN 4.5 2 0.8 18 15 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 VCC = 4.5 V, VCC = 4.5 V VCC = 4.75 V, VOL IOZH IOZL II IIH IIL IOS ICC VCC = 4 5 V 4.5 VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V TEST CONDITIONS CONDITIONS II = 18 mA IOH = 3 mA IOH = 12 mA IOH = 15 mA IOH = 3 mA IOL = 48 mA IOL = 64 mA VO = 2.7 V VO = 0.5 V VI = 7 V VI = 2.7 V VI = 0.5 V VO = 0 Outputs high Outputs low Outputs disabled 100 19 50 42 MIN SN54F240 TYP MAX 1.2 2.4 2 3.3 3.2 2 2.7 0.38 0.55 0.42 50 50 0.1 20 1 225 29 75 63 100 19 50 42 0.55 50 50 0.1 20 1 225 29 75 63 mA V µA µA mA µA mA mA 3.1 2.4 3.3 V MIN SN74F240 TYP MAX 1.2 UNIT V
VOH
All typical values are at VCC = 5 V, TA = 25°C. Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
23
SN54F240, SN74F240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SDFS061A D2932, MARCH 1987 REVISED OCTOBER 1993
switching characteristics (see Note 2)
VCC = 5 V, CL = 50 pF, RL = 500 , TA = 25°C F240 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ Any A Y Y Y 2.2 1.2 1.2 3.2 1.2 1.2 TYP 4.7 3.1 3.1 6.5 3.6 5.6 MAX 7 4.7 5.3 9 5.3 8 VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 , TA = MIN to MAX SN54F240 MIN 2.2 1.2 1.2 3.2 1.2 1.2 MAX 9 6 6.7 10.5 6.5 12.5 SN74F240 MIN 2.2 1.2 1.2 3.2 1.2 1.2 MAX 8 5.7 6.1 10 6.3 9.5 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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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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Copyright © 1998, Texas Instruments Incorporated
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