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SN74BCT2241 OCTAL BUFFER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS
SCBS035C - SEPTEMBER 1988 - REVISED NOVEMBER 1993
* * * * *
State-of-the-Art BiCMOS Design Significantly Reduces ICCZ ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015 Output Ports Have Equivalent 33- Series Resistors, So No External Resistors Are Required 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (N)
DW OR N PACKAGE (TOP VIEW)
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
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 BCT2240 and BCT2244, these devices provide the choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs. These devices feature high fan-out and improved fan-in. The outputs, which are designed to source or sink up to 12 mA, include 33- series resistors to reduce overshoot and undershoot. The SN74BCT2241 is characterized for operation from 0C to 70C.
FUNCTION TABLES INPUTS 1OE L L H 1A H L X OUTPUT 1Y H L Z
INPUTS 2OE H H L 2A H L X
OUTPUT 2Y H L Z
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 (c) 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
2-1
SN74BCT2241 OCTAL BUFFER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS
SCBS035C - SEPTEMBER 1988 - REVISED NOVEMBER 1993
logic symbol
1OE 1 EN 18 16 14 12
logic diagram (positive logic)
1OE 1
1A1 1A2 1A3 1A4
2 4 6 8
1
1Y1 1Y2 1Y3 1Y4
1A1
2
18
1Y1
1A2
4
16
1Y2
1A3 2OE 19 EN 9 7 5 3 1A4 2Y1 2Y2 2Y3 2Y4 2A1 2OE
6
14
1Y3
8
12
2A1 2A2 2A3 2A4
11 13 15 17
1Y4
1
19
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
11
9
2Y1
2A2
13
7
2Y2
2A3
15
5
2Y3
2A4
17
3
2Y4
schematic of Y outputs
VCC
Output
GND
2-2
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
SN74BCT2241 OCTAL BUFFER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS
SCBS035C - SEPTEMBER 1988 - REVISED NOVEMBER 1993
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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to 7 V Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . - 0.5 V to 5.5 V Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to VCC Input clamp current, IIK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 mA Current into any output in the low state, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 mA Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C
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 negative-voltage rating may be exceeded if the input clamp-current rating is 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 -12 12 70 NOM 5 MAX 5.5 UNIT V V V mA mA mA C
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
2-3
SN74BCT2241 OCTAL BUFFER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS
SCBS035C - SEPTEMBER 1988 - REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VCC = 4.5 V, VCC = 4 5 V 4.5 VCC = 4.75 V, VOL II IIH IIL IOZH IOZL IOS ICCH ICCL ICCZ Ci Co 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, VCC = 5.5 V, VCC = 5.5 V, VCC = 5 V, TEST CONDITIONS II = -18 mA IOH = -1 mA IOH = - 12 mA IOH = - 3 mA IOL = 1 mA IOL = 12 mA VI = 7 V VI = 2.7 V VI = 0.5 V VO = 2.7 V VO = 0.5 V VO = 0 Outputs open Outputs open Outputs open -100 23 48 6 6 11 MIN 2.4 2 2.7 0.15 0.42 0.5 0.8 0.1 20 -1 50 - 50 - 225 37 76 9 V mA A mA A A mA mA mA mA pF pF TYP 3.3 V MAX -1.2 UNIT V
VI = 2.5 V or 0.5 V VCC = 5 V, VO = 2.5 V or 0.5 V All typical values are at VCC = 5 V, TA = 25C. Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Note 2)
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) A TO (OUTPUT) Y Y Y VCC = 5 V, TA = 25C MIN 1.1 2.9 2.7 4.1 2.5 3.2 TYP 3 4.9 6 7.7 5.2 7.1 MAX 4.4 6.6 7.8 9.4 7.2 9.5 1.1 2.9 2.7 4.1 2.5 3.2 4.9 6.9 8.9 10.3 8.7 11.3 ns ns ns MIN MAX UNIT
OE or OE OE or OE
NOTE 2: Load circuit and voltage waveforms are shown in Section 1.
2-4
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
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Copyright (c) 1998, Texas Instruments Incorporated

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