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PDF IDT74FCT245APY Data sheet ( Hoja de datos )

Número de pieza IDT74FCT245APY
Descripción 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
Fabricantes Integrated Device Tech 
Logotipo Integrated Device Tech Logotipo



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Integrated Device Technology, Inc.
3.3V CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVERS
IDT54/74FCT3245/A
FEATURES:
• 0.5 MICRON CMOS Technology
• ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
• 25 mil Center SSOP and QSOP Packages
• Extended commercial range of -40°C to +85°C
• VCC = 3.3V ±0.3V, Normal Range or
VCC = 2.7V to 3.6V, Extended Range
• CMOS power levels (0.4µW typ. static)
• Rail-to-Rail output swing for increased noise margin
• Military product compliant to MIL-STD-883, Class B
DESCRIPTION:
The FCT3245/A octal transceivers are built using ad-
vanced dual metal CMOS technology. These high-speed,
low-power transceivers are ideal for synchronous communi-
cation between two busses (A and B). The direction control
pin (DIR) controls the direction of data flow. The output enable
pin (OE) overrides the direction control and disables both
ports. All inputs are designed with hysteresis for improved
noise margin.
The FCT3245/A have series current limiting resistors.
These offer low ground bounce, minimal undershoot, and
controlled output fall times-reducing the need for external
series terminating resistors.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
DIR 1
20 Vcc
DIR
A1
A2
A1 2
19 OE
A2 3
18 B 1
OE
A3 4
P20-1
D20-1
17
B2
A4 5 SO20-2 16 B3
B1
A5
6
SO20-7
SO20-8
15
B4
A6 7
& 14 B5
A7 8
E20-1 13 B6
B2
A8 9
12 B7
A3
GND 10
11 B8
B3
A4
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
B4
A5
B5 INDEX
A6
B6 2650 drw 02
A7
32
20 19
B7
A3 4
1 18 B1
A8
A4 5
17 B2
B8
A5
6
L20-2
16 B3
2650 drw 01
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1996 Integrated Device Technology, Inc.
8.12
LCC
TOP VIEW
2650 drw 03
FEBRUARY 1996
DSC-2650/5
1

1 page




IDT74FCT245APY pdf
IDT54/74FCT3245/A
3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
6V
V CC
Open
V IN
Pulse
Generator
D.U.T.
RT
V OUT
GND
500
50pF
500
CL
2650 drw 04
SWITCH POSITION
Test
Open Drain
Disable Low
Enable Low
Disable High
Enable High
Switch
6V
GND
All Other tests
Open
DEFINITIONS:
2650 lnk 08
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
DATA
INPUT
TIMING
tSU tH
3V
1.5V
0V
3V
LOW-HIGH-LOW
PULSE
1.5V
INPUT
1.5V
ASYNCHRONOUS CONTROL
PRESET
tREM
0V
3V
tW
CLEAR
ETC.
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
tSU
tH
3V
1.5V
0V
2650 drw 06
ETC.
2650 drw 05
PROPAGATION DELAY
SAME PHASE
INPUT TRANSITION
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
tPLH
tPLH
tPHL
tPHL
ENABLE AND DISABLE TIMES
3V
1.5V
0V
VOH
1.5V
VOL
3V
1.5V
0V
2650 drw 07
ENABLE
DISABLE
CONTROL
INPUT
OUTPUT
NORMALLY
LOW
tPZL
SWITCH
6V
tPZH
OUTPUT
NORMALLY
HIGH
SWITCH
GND
3V
1.5V
0V
tPLZ
3V
1.5V
tPHZ
1.5V
3V
0.3V VOL
0.3V VOH
0V 0V
NOTES:
2650 drw 08
1. Diagram shown for input Control Enable-LOW and input Control Disable-
HIGH.
2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns.
3. If VCC is below 3V, input voltage swings should be adjusted not to exceed
VCC.
8.12 5

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