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CD74HCT242 Datasheet(PDF) 1 Page - Texas Instruments

Part No. CD74HCT242
Description  High Speed CMOS Logic Quad-Bus Transceiver with Three-State Outputs
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD74HCT242 Datasheet(HTML) 1 Page - Texas Instruments

   
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1
Data sheet acquired from Harris Semiconductor
SCHS168
CD74HCT242 was not acquired from Harris Semiconductor.
Features
• Typical Propagation Delay (A to B, B to A) of 7ns at
VCC = 5V, CL = 15pF, TA = 25
oC
• Three-State Outputs
• Buffered Inputs
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
Pinout
CD74HCT242, CD74HC243, CD74HCT243
(PDIP, SOIC)
TOP VIEW
Description
The Harris CD74HCT242, CD74HC243 and CD74HCT243
silicon-gate CMOS three-state bidirectional inverting and
non-inverting buffers are intended for two-way asynchronous
communication between data buses. They have high drive
current outputs which enable high-speed operation when
driving large bus capacitances. These circuits possess the
low power dissipation of CMOS circuits, and have speeds
comparable to low power Schottky TTL circuits. They can
drive 15 LSTTL loads.
The CD74HCT242 is an inverting buffer; the CD74HC243
and CD74HCT243 are non-inverting buffers.
The states of the output enables (OEB, OEA) determine
both the direction of flow (A to B, B to A), and the three-state
mode.
OEB
NC
A0
A1
A2
A3
GND
VCC
OEA
NC
B0
B1
B2
B3
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Ordering Information
PART NUMBER
TEMP. RANGE
(oC)
PACKAGE
PKG.
NO.
CD74HC243E
-55 to 125
14 Ld PDIP
E14.3
CD74HC243M
-55 to 125
14 Ld SOIC
M14.15
CD74HCT243M
-55 to 125
14 Ld SOIC
M14.15
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer or die for this part number is available which meets all elec-
trical specifications. Please contact your local sales
November 1997
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© Harris Corporation 1997
CD74HCT242, CD74HC243,
CD74HCT243
High Speed CMOS Logic
Quad-Bus Transceiver with Three-State Outputs
File Number
1488.1
[ /Title
(CD74
HCT24
2,
CD74
HC243
,
CD74
HCT24
3)
/Sub-
ject
(High
Speed
CMOS
Logic
Quad-


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