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CD74HC243E Scheda tecnica(PDF) 1 Page - Texas Instruments

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Il numero della parte CD74HC243E
Spiegazioni elettronici  High-Speed CMOS Logic Quad-Bus Transceiver with Three-State Outputs
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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Data sheet acquired from Harris Semiconductor
SCHS168D
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
CD54HC243, CD54HCT243
(CERDIP)
CD74HC243, CD74HCT243
(PDIP, SOIC)
TOP VIEW
Description
The ’HC243 and ’HCT243 silicon-gate CMOS three-state
bidirectional noninverting buffers are intended for two-way
asynchronous communication between data buses. They
have high-drive-current outputs that enable high-speed oper-
ation 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 states of the output-enable (OEB, OEA) inputs
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
CD54HC243F3A
-55 to 125
14 Ld CERDIP
CD54HCT243F3A
-55 to 125
14 Ld CERDIP
CD74HC243E
-55 to 125
14 Ld PDIP
CD74HC243M
-55 to 125
14 Ld SOIC
CD74HC243MT
-55 to 125
14 Ld SOIC
CD74HC243M96
-55 to 125
14 Ld SOIC
CD74HCT243E
-55 to 125
14 Ld PDIP
CD74HCT243M
-55 to 125
14 Ld SOIC
NOTE: When ordering, use the entire part number. The suffix 96
denotes tape and reel. The suffix T denotes a small-quantity reel of
250.
November 1997 - Revised October 2003
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© 2003, Texas Instruments Incorporated
CD54HC243, CD74HC243,
CD54HCT243, CD74HCT243
High-Speed CMOS Logic
Quad-Bus Transceiver with Three-State Outputs
[ /Title
(CD74
HCT24
2,
CD74
HC243
,
CD74
HCT24
3)
/Sub-
ject
(High
Speed
CMOS
Logic
Quad-


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