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54AC16240, 74AC16240 16-BIT BUS DRIVERS WITH 3-STATE OUTPUTS
SCAS234B - JULY 1990 - REVISED OCTOBER 1996
D D D D D D D
Members of the Texas Instruments Widebus TM Family 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Flow-Through Architecture Optimizes PCB Layout Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise EPICTM (Enhanced-Performance Implanted CMOS) 1-m Process 500-mA Typical Latch-Up Immunity at 125C Package Options Include Plastic 300-mil Shrink Small-Outline (DL) Package Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Pin Spacings
54AC16240 . . . WD PACKAGE 74AC16240 . . . DL PACKAGE (TOP VIEW)
description
The 'AC16240 are 16-bit buffers and line drivers designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. They can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide inverting outputs and symmetrical active-low output-enable (OE) inputs.
1OE 1Y1 1Y2 GND 1Y3 1Y4 VCC 2Y1 2Y2 GND 2Y3 2Y4 3Y1 3Y2 GND 3Y3 3Y4 VCC 4Y1 4Y2 GND 4Y3 4Y4 4OE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
2OE 1A1 1A2 GND 1A3 1A4 VCC 2A1 2A2 GND 2A3 2A4 3A1 3A2 GND 3A3 3A4 VCC 4A1 4A2 GND 4A3 4A4 3OE
The 74AC16240 is packaged in TI's shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed circuit board area. The 54AC16240 is characterized for operation over the full military temperature range of -55C to 125C. The 74AC16240 is characterized for operation from -40C to 85C.
FUNCTION TABLE (each 4-bit buffer) INPUTS OE L L H A H L X OUTPUT Y L H Z
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. EPIC and Widebus are trademarks of Texas Instruments Incorporated.
UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information 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
Copyright (c) 1996, Texas Instruments Incorporated
* DALLAS, TEXAS 75265
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54AC16240, 74AC16240 16-BIT BUS DRIVERS WITH 3-STATE OUTPUTS
SCAS234B - JULY 1990 - REVISED OCTOBER 1996
logic symbol
1OE 2OE 3OE 4OE 1A1 1A2 1A3 1A4 2A1 2A2 2A3 2A4 3A1 3A2 3A3 3A4 4A1 4A2 4A3 4A4 1 48 25 24 47 46 44 43 41 40 38 37 36 35 33 32 30 29 27 26 1 4 1 3 1 2 EN1 EN2 EN3 EN4 1 1 2 3 5 6 8 9 11 12 13 14 16 17 19 20 22 23 1Y1 1Y2 1Y3 1Y4 2Y1 2Y2 2Y3 2Y4 3Y1 3Y2 3Y3 3Y4 4Y1 4Y2 4Y3 4Y4
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
54AC16240, 74AC16240 16-BIT BUS DRIVERS WITH 3-STATE OUTPUTS
SCAS234B - JULY 1990 - REVISED OCTOBER 1996
logic diagram (positive logic)
1OE 1 3OE 2 25
1A1
47
1Y1
3A1
36
13 3Y1 14
1A2
46
3
1Y2
3A2
35
3Y2
1A3
44
5
1Y3
3A3
33
16
3Y3
1A4
43
6 1Y4 3A4
32
17
3Y4
2OE
48
4OE 8
24
2A1
41
2Y1
4A1
30
19
4Y1
2A2
40
9
2Y2
4A2
29
20
4Y2
2A3
38
11 2Y3
27 4A3 26
22
4Y3
2A4
37
12
2Y4
23
4A4
4Y4
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 VCC + 0.5 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 mA Maximum power dissipation at TA = 55C (in still air)(see Note 2): DL package . . . . . . . . . . . . . . . . . . . . 1.2 W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The maximum package power dissipation is calculated using a junction temperature of 150C and a board trace length of 750 mils.
POST OFFICE BOX 655303
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3
54AC16240, 74AC16240 16-BIT BUS DRIVERS WITH 3-STATE OUTPUTS
SCAS234B - JULY 1990 - REVISED OCTOBER 1996
recommended operating conditions (see Note 3)
54AC16240 MIN VCC VIH Supply voltage High-level input voltage VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage High-level output current VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V IOL t/v Low-level output current Input transition rise or fall rate VCC = 4.5 V VCC = 5.5 V 0 -55 VCC = 4.5 V VCC = 5.5 V 0 0 3 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC -4 -24 -24 12 24 24 10 125 0 -40 0 0 NOM 5 MAX 5.5 74AC16240 MIN 3 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC -4 -24 -24 12 24 24 10 85 ns/V C mA mA V V V V NOM 5 MAX 5.5 UNIT V
TA Operating free-air temperature NOTE 3: Unused inputs must be held high or low to prevent them from floating.
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS VCC 3V IOH = - 50 A VOH IOH = - 4 mA IOH = - 24 mA A IOH = - 75 mA IOL = 50 A VOL IOL = 12 mA IOL = 24 mA IOL = 75 mA VI = VCC or GND VO = VCC or GND VI = VCC or GND, VI = VCC or GND VO = VCC or GND IO = 0 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 3V 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5V 5V 4.5 12 0.1 0.5 8 0.1 0.1 0.1 0.36 0.36 0.36 MIN 2.9 4.4 5.4 2.58 3.94 4.94 TA = 25C TYP MAX 54AC16240 MIN 2.9 4.4 5.4 2.48 3.8 4.8 3.85 0.1 0.1 0.1 0.44 0.44 0.44 1.65 1 5 80 MAX 74AC16240 MIN 2.9 4.4 5.4 2.48 3.8 4.8 3.85 0.1 0.1 0.1 0.44 0.44 0.44 1.65 1 5 80 A A A pF pF V V MAX UNIT
II IOZ ICC Ci Co
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice.
4
POST OFFICE BOX 655303
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54AC16240, 74AC16240 16-BIT BUS DRIVERS WITH 3-STATE OUTPUTS
SCAS234B - JULY 1990 - REVISED OCTOBER 1996
switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) A TO (OUTPUT) Y Y Y MIN 1.8 2.5 2.1 2.9 4.3 3.6 TA = 25C TYP MAX 5.4 7 6.1 8.4 6.2 6 7.5 9.3 8.5 11.3 8.3 7.8 54AC16240 MIN 1.8 2.5 2.1 2.9 4.3 3.6 MAX 8.3 10.2 9.5 12.6 8.7 8.4 74AC16240 MIN 1.8 2.5 2.1 2.9 4.3 3.6 MAX 8.3 10.2 9.5 12.6 8.7 8.4 UNIT ns ns ns
OE OE
switching characteristics over recommended operating free-air temperature range, VCC = 5 V 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) A TO (OUTPUT) Y Y Y MIN 1.3 1.9 1.6 3.2 4.2 3.4 TA = 25C TYP MAX 3.3 4.3 3.8 4.7 6 5.1 5.3 6.5 5.9 7.2 7.7 6.9 54AC16240 MIN 1.3 1.9 1.6 3.2 4.2 3.4 MAX 5.8 7.1 6.6 8.1 8.1 7.3 74AC16240 MIN 1.3 1.9 1.6 3.2 4.2 3.4 MAX 5.8 7.1 6.6 8.1 8.1 7.3 UNIT ns ns ns
OE OE
operating characteristics, VCC = 5 V, TA = 25C
PARAMETER Cpd d Power dissipation capacitance per latch Outputs enabled Outputs disabled TEST CONDITIONS CL = 50 pF pF, f = 1 MHz TYP 42 6 UNIT pF
PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice.
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
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54AC16240, 74AC16240 16-BIT BUS DRIVERS WITH 3-STATE OUTPUTS
SCAS234B - JULY 1990 - REVISED OCTOBER 1996
PARAMETER MEASUREMENT INFORMATION
2 x VCC From Output Under Test CL = 50 pF (see Note A) 500 S1 Open GND 500 TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH S1 Open 2 x VCC GND
LOAD CIRCUIT VCC Input tPLH In-Phase Output tPHL Out-of-Phase Output 50% VCC 50% VCC 50% 50% 0V tPHL VOH 50% VCC VOL tPLH VOH 50% VCC VOL Output Waveform 2 S1 at GND (see Note B) Output Waveform 1 S1 at 2 x VCC (see Note B) tPZH Output Control (low-level enabling) VCC 50% tPZL tPLZ 50% VCC tPHZ 80% VCC VOH 20% VCC 50% 0V
[ VCC
VOL
50% VCC
[0V
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR 1 MHz, ZO = 50 , tr = 3 ns, tf = 3 ns. D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
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Copyright (c) 1998, Texas Instruments Incorporated

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