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Integrated Device Technology Electronic Components Datasheet

IDT74FCT652DT Datasheet

FAST CMOS OCTAL TRANSCEIVER/REGISTERS

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Integrated Device Technology, Inc.
FAST CMOS OCTAL IDT54/74FCT646T/AT/CT/DT - 2646T/AT/CT
TRANSCEIVER/
IDT54/74FCT648T/AT/CT
IDT54/74FCT652T/AT/CT/DT - 2652T/AT/CT
REGISTERS (3-STATE)
FEATURES:
• Common features:
– Low input and output leakage 1µA (max.)
– Extended commercial range of –40°C to +85°C
– CMOS power levels
– True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
– Meets or exceeds JEDEC standard 18 specifications
– Product available in Radiation Tolerant and Radiation
Enhanced versions
– Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
– Available in DIP, SOIC, SSOP, QSOP, TSSOP,
CERPACK and LCC packages
• Features for FCT646T/648T/652T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 64mA IOL)
– Power off disable outputs permit “live insertion”
• Features for FCT2646T/2652T:
– Std., A, and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– Reduced system switching noise
FUNCTIONAL BLOCK DIAGRAM
IDT54/74FCT646/2646/648
ONLY
G
GBA
DESCRIPTION:
The FCT646T/FCT2646T/FCT648T/FCT652T/2652T con-
sist of a bus transceiver 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 regis-
ters.
The FCT652T/FCT2652T utilize GAB and GBA signals to
control the transceiver functions. The FCT646T/FCT2646T/
FCT648T utilize the enable control (G) and direction (DIR)
pins to control the transceiver functions.
SAB and SBA control pins are provided to select either real-
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.
Data on the A or B data bus, or both, can be stored in the
internal D flip-flops by LOW-to-HIGH transitions at the appro-
priate clock pins (CPAB or CPBA), regardless of the select or
enable control pins.
The FCT26xxT have balanced drive outputs with current
limiting resistors. This offers low ground bounce, minimal
undershoot and controlled output fall times-reducing the need
for external series terminating resistors. FCT2xxxT parts are
plug-in replacements for FCTxxxT parts.
IDT54/74FCT652/2652
ONLY
GAB
DIR
CPBA
SBA
CPAB
SAB
1 OF 8 CHANNELS
B REG
1D
C1
646/2646/652/2652
ONLY
A1 A REG
1D
C1
B1
646/2646/652/2652
ONLY
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
TO 7 OTHER CHANNELS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1996 Integrated Device Technology, Inc.
6.20
2634 drw 01
SEPTEMBER 1996
DSC-2634/9
1


Integrated Device Technology Electronic Components Datasheet

IDT74FCT652DT Datasheet

FAST CMOS OCTAL TRANSCEIVER/REGISTERS

No Preview Available !

IDT54/74FCT646/2646/652/2652T/AT/CT/DT, 648T/AT/CT
FAST CMOS OCTAL TRANSCEIVER/REGISTER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
INDEX
CPAB
SAB
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
1 24
2 23
3 P24-1 22
4 D24-1 21
5 SO24-2 20
6 SO24-7* 19
7 SO24-8 18
8 SO24-9* 17
9 & 16
10 E24-1 15
11 14
12 13
VCC
CPBA
SBA
G
B1
B2
B3
B4
B5
B6
B7
B8
FCT646/FCT2646T
FCT648
2634 drw 02
DIP/SOIC/SSOP/
QSOP/TSSOP/CERPACK
TOP VIEW
A1
54
3
2
1
28 27 26
25
A2 6
24
A3 7
23
NC 8
L28-1
22
A4 9
21
A5 10
20
A6 1112 13 14 15 16 17 1819
LCC
TOP VIEW
* FCT646/2646T/AT/CT/DT only
CPAB
SAB
GAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
1 24
2 23
3 P24-1 22
4 D24-1 21
5 SO24-2 20
6 SO24-7* 19
7 SO24-8 18
8 & 17
9 E24-1 16
10 15
11 14
12 13
DIP/SOIC/SSOP/
QSOP/CERPACK
TOP VIEW
VCC
CPBA
SBA
GBA
B1
B2
B3
B4
B5
B6
B7
B8
2634 drw 04
INDEX
FCT652/FCT2652T
A1
A2
A3
NC
A4
A5
A6
* FCT652/2652T/AT/CT/DT only
54
3
2
1
28 27 26
25
6 24
7 23
8
L28-1
22
9 21
10 20
1112 13 14 15 16 17 1819
LCC
TOP VIEW
G
B1
B2
NC
B3
B4
B5
2634 drw 03
GBA
B1
B2
NC
B3
B4
B5
2634 drw 05
PIN DESCRIPTION
Pin Names
A1 - A8
B1 - B8
CPAB, CPBA
SAB, SBA
DIR, G
GAB, GBA
Description
Data Register A Inputs
Data Register B Outputs
Data Register B Inputs
Data Register A Outputs
Clock Pulse Inputs
Output Data Source Select Inputs
Output Enable Inputs (646/648)
Output Enable Inputs (652)
2634 tbl 01
6.20 2


Part Number IDT74FCT652DT
Description FAST CMOS OCTAL TRANSCEIVER/REGISTERS
Maker IDT
Total Page 9 Pages
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