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CD74FCT245SME4 Datasheet

Download or read online TI (Texas Instruments) CD74FCT245SME4 FCT SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 pdf datasheet.



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BiCMOS Technology With Low Quiescent
Power
Buffered Inputs
Noninverted Outputs
Input/Output Isolation From V
Controlled Output Edge Rates
64-mA Output Sink Current
Output Voltage Swing Limited to 3.7 V
SCR Latch-Up-Resistant BiCMOS Process
and Circuit Design
Package Options Include Plastic
Small-Outline (M) and Shrink Small-Outline
(SM) Packages and Standard Plastic (E) DIP
description
The CD74FCT245 is an octal bus transceiver with 3-state outputs using a small-geometry BiCMOS technology.
The output stages are a combination of bipolar and CMOS transistors that limit the output high level to two diode
drops below V
. This resultant lowering of output swing (0 V to 3.7 V) reduces the power-bus ringing [a source
CC
of electromagnetic interference (EMI)] and minimizes V
simultaneous output switching. The output configuration also enhances switching speed and is capable of
sinking 64 mA.
The CD74FCT245 allows data transmission from the A bus to the B bus or from the B bus to the A bus,
depending upon the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used
to disable the device so that the buses are effectively isolated.
To ensure the high-impedance state during power up or power down, OE should be tied to V
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The CD74FCT245 is characterized for operation from 0 C to 70 C.
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.
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.
BiCMOS OCTAL BUS TRANSCEIVER
CC
bounce and ground bounce and their effects during
CC
FUNCTION TABLE
INPUTS
OPERATION
OPERATION
OE
DIR
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
CD74FCT245
WITH 3-STATE OUTPUTS
SCBS721 – JULY 2000
E, M, OR SM PACKAGE
(TOP VIEW)
DIR
V
1
20
CC
A1
OE
2
19
A2
3
18
B1
A3
4
17
B2
A4
5
16
B3
A5
6
15
B4
A6
7
14
B5
8
13
A7
B6
9
12
A8
B7
10
11
GND
B8
through a pullup
CC
Copyright
2000, Texas Instruments Incorporated
1
Specifications of TI (Texas Instruments) CD74FCT245SME4
Mfr Package Description:
GREEN, PLASTIC, SSOP-20
Lead Free:
Yes
EU RoHS Compliant:
Yes
China RoHS Compliant:
Yes
Technology:
BICMOS
Package Shape:
RECTANGULAR
Package Style:
SMALL OUTLINE, SHRINK PITCH
Surface Mount:
Yes
Terminal Form:
GULL WING
Terminal Pitch:
0.6500 mm
Terminal Finish:
NICKEL PALLADIUM GOLD
Terminal Position:
DUAL
Number of Functions:
1
Number of Terminals:
20
Package Body Material:
PLASTIC/EPOXY
Temperature Grade:
COMMERCIAL
Output Characteristics:
3-ST
Operating Temperature-Max:
70 Cel
Operating Temperature-Min:
0.0 Cel
Supply Voltage-Max (Vsup):
5.25 V
Supply Voltage-Min (Vsup):
4.75 V
Supply Voltage-Nom (Vsup):
5 V
Logic IC Type:
TRANSCEIVER
Number of Bits:
8
Number of Ports:
2
Output Polarity:
TRUE
Propagation Delay (tpd):
7 ns

Summary of Contents

Page 1

BiCMOS Technology With Low Quiescent Power Buffered Inputs Noninverted Outputs Input/Output Isolation From V Controlled Output Edge Rates 64-mA Output Sink Current Output Voltage Swing Limited to 3.7 V SCR Latch-Up-Resistant BiCMOS Process and Circuit Design Package Options Include Plastic ...

Page 2

CD74FCT245 BiCMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCBS721 JULY 2000 logic symbol OE DIR This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic ...

Page 3

DC supply voltage range input clamp current < 0 output clamp current output sink current per ...

Page 4

CD74FCT245 BiCMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCBS721 JULY 2000 switching characteristics over recommended operating conditions (unless otherwise noted) (see Figure 1) PARAMETER PARAMETER dis noise characteristics ...

Page 5

PARAMETER MEASUREMENT INFORMATION From Output Test From Output Under Test Point Under Test 500 (see Note A) LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS 90% 90% 1 VOLTAGE WAVEFORM INPUT RISE AND FALL ...

Page 6

PACKAGING INFORMATION (1) Orderable Device Status CD74FCT245E ACTIVE CD74FCT245EE4 ACTIVE CD74FCT245M ACTIVE CD74FCT245M96 ACTIVE CD74FCT245M96E4 ACTIVE CD74FCT245M96G4 ACTIVE CD74FCT245ME4 ACTIVE CD74FCT245MG4 ACTIVE CD74FCT245SM OBSOLETE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new ...

Page 7

TAPE AND REEL INFORMATION All dimensions are nominal Device Package Package Type Drawing CD74FCT245M96 SOIC DW PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 20 2000 330.0 24.4 10.8 Pack Materials-Page 1 11-Mar-2008 ...

Page 8

Device Package Type CD74FCT245M96 SOIC PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2000 Pack Materials-Page 2 11-Mar-2008 Width (mm) Height (mm) 346.0 346.0 41.0 ...

Page 9

DB (R-PDSO-G) 28 PINS SHOWN 0, 2,00 MAX PINS DIM A MAX A MIN NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not ...

Page 12

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the ...

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