IDT74FCT646AP Integrated Device Technology, Inc., IDT74FCT646AP Datasheet

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IDT74FCT646AP

Manufacturer Part Number
IDT74FCT646AP
Description
FAST CMOS OCTAL TRANSCEIVER/REGISTER
Manufacturer
Integrated Device Technology, Inc.
Datasheet
FEATURES:
• IDT54/74FCT646 equivalent to FAST
• IDT54/74FCT646A 30% faster than FAST
• IDT54/74FCT646C 40% faster than FAST
• Independent registers for A and B buses
• Multiplexed real-time and stored data
• I
• CMOS power levels (1mW typical static)
• TTL input and output level compatible
• CMOS output level compatible
• Available in 24-pin (300 mil) CERDIP, plastic DIP, SOIC,
• Product available in Radiation Tolerant and Radiation
• Military product compliant to MIL-STD-883, Class B
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a registered trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1992 Integrated Device Technology, Inc.
Integrated Device Technology, Inc.
CERPACK and 28-pin LCC
Enhanced Versions
OL
= 64mA (commercial) and 48mA (military)
CPBA
CPAB
SBA
SAB
DIR
G
A
1
1 OF 8 CHANNELS
A REG
1D
C
1
FAST CMOS OCTAL
TRANSCEIVER/REGISTER
speed;
TO 7 OTHER CHANNELS
7.18
DESCRIPTION:
with 3-state D-type flip-flops and control circuitry arranged for
multiplexed transmission of data directly from the data bus or
from the internal storage registers.
and direction (DIR) pins to control the transceiver functions.
time or stored data transfer. The circuitry used for select
control will eliminate the typical decoding glitch that occurs in
a multiplexer during the transition between stored and real-
time data. A LOW input level selects real-time data and a
HIGH selects stored data.
internal D flip flops by LOW-to-HIGH transitions at the
appropriate clock pins (CPAB or CPBA) regardless of the
select or enable control pins.
The IDT54/74FCT646/A/C consists of a bus transceiver
The IDT54/74FCT646/A/C utilizes the enable control (
SAB and SBA control pins are provided to select either real
Data on the A or B data bus or both can be stored in the
B REG
C
1D
1
2536 drw 01
IDT54/74FCT646A
IDT54/74FCT646C
IDT54/74FCT646
B
1
MAY 1992
DSC-4626/2
1
G
)

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IDT74FCT646AP Summary of contents

Page 1

... DIR CPBA SBA CPAB SAB CHANNELS A 1 The IDT logo is a registered trademark of Integrated Device Technology, Inc. FAST is a registered trademark of National Semiconductor Co. MILITARY AND COMMERCIAL TEMPERATURE RANGES 1992 Integrated Device Technology, Inc. FAST CMOS OCTAL TRANSCEIVER/REGISTER DESCRIPTION: speed; The IDT54/74FCT646/A/C consists of a bus transceiver ...

Page 2

IDT54/74FCT646/A/C FAST CMOS OCTAL TRANSCEIVER/REGISTER PIN CONFIGURATIONS CPAB 1 SAB 2 DIR 3 P24- D24- S024 & E24 ...

Page 3

IDT54/74FCT646/A/C FAST CMOS OCTAL TRANSCEIVER/REGISTER BUS A DIR G CPAB CPBA REAL–TIME TRANSFER BUS B TO BUS A BUS A DIR G CPAB CPBA STORAGE FROM A AND/OR ...

Page 4

IDT54/74FCT646/A/C FAST CMOS OCTAL TRANSCEIVER/REGISTER ABSOLUTE MAXIMUM RATINGS Symbol Rating Commercial (2) V Terminal Voltage –0.5 to +7.0 TERM with Respect to GND (3) V Terminal Voltage –0 TERM with Respect to GND T Operating 0 to +70 ...

Page 5

IDT54/74FCT646/A/C FAST CMOS OCTAL TRANSCEIVER/REGISTER POWER SUPPLY CHARACTERISTICS V = 0.2V – 0. Symbol Parameter I Quiescent Power Supply Current CC I Quiescent Power Supply Current CC TTL Inputs HIGH I Dynamic Power Supply ...

Page 6

IDT54/74FCT646/A/C FAST CMOS OCTAL TRANSCEIVER/REGISTER SWITCHING CHARACTERISTICS OVER OPERATING RANGE Symbol Parameter Condition t Propagation PLH L t Delay R = 500 PHL L Bus to Bus t Output Enable PZH G t Time , DIR ...

Page 7

IDT54/74FCT646/A/C FAST CMOS OCTAL TRANSCEIVER/REGISTER TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS OUT IN Pulse D.U.T. Generator R T SET-UP, HOLD AND RELEASE TIMES DATA INPUT t SU TIMING INPUT ASYNCHRONOUS CONTROL t PRESET ...

Page 8

IDT54/74FCT646/A/C FAST CMOS OCTAL TRANSCEIVER/REGISTER ORDERING INFORMATION IDT XX FCT XXXX Temperature Device Package Range Type XX X Process/ Temperature Range Blank Commercial B MIL-STD-883, Class B P Plastic DIP D CERDIP SO Small Outline IC L Leadless Chip Carrier ...

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