IDT IDT74FCT245ALB Fast cmos octal bidirectional transceiver Datasheet

IDT54/74FCT245/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVER
FEATURES:
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IDT54/74FCT245/A/C
DESCRIPTION:
IDT54FCT245 equivalent to FAST™ speed and drive
IDT54/74FCT245A 25% faster than FAST
IDT74FCT245C 40% faster than FAST
TTL input and output compatible
CMOS output level compatible
IOL = 64mA (commercial) and 48mA (military)
µA max.
Current levels only 5µ
CMOS power levels (2.5mW typ. static)
Direction control and overriding 3-state control
MIlitary product compliant to MIL-STD-883, Class B
Meets or exceeds JEDEC Standard 18 specifications
Available in the following packages:
– Commercial: SOIC
– Military: CERDIP, LCC
The IDT octal bidirectional transceivers are built using an advanced dual
metal CMOS technology. The FCT245 is designed for asynchronous twoway communication between data buses. The transmit/receive (T/R) input
determines the direction of data flow through the bidirectional transceiver.
Transmit (active high) enables data from A ports to B ports, and receive
(active low) from B ports to A ports. The output enable (OE) input, when
high, disables both A and B ports by placing them in High-Z condition.
The FCT245 transceivers have non-inverting outputs.
FUNCTIONAL BLOCK DIAGRAM
T/R
1
19
OE
A0
2
18
B0
3
A1
17
B1
A2
4
16
B2
A3
5
15
B3
6
A4
14
B4
A5
7
13
A6
B5
8
12
B6
A7
9
11
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
B7
JUNE 2002
1
© 2002 Integrated Device Technology, Inc.
DSC-5421/1
IDT54/74FCT245/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
3
18
B0
A2
4
17
B1
A2
A3
5
16
B2
A3
A4
6
15
B3
A5
7
14
B4
A6
8
13
B5
A7
9
12
B6
10
11
B7
GND
3
2
1
VTERM(2)
Terminal Voltage
B0
5
17
B1
A4
6
16
B2
A5
7
15
B3
A6
8
14
B4
9
10
11
12
Terminal Voltage
Military
Unit
–0.5 to +7
–0.5 to +7
V
–0.5 to VCC
–0.5 to VCC
V
Pin Names
OE
T/R
A0 - A7
B0 - B7
with Respect to GND
TA
Operating Temperature
0 to +70
–55 to +125
°C
TBIAS
Temperature under BIAS
–55 to +125
–65 to +135
°C
TSTG
Storage Temperature
–55 to +125
–65 to +150
°C
PT
Power Dissipation
0.5
0.5
W
IOUT
DC Output Current
120
120
mA
Inputs
Conditions
Typ.
Max.
Unit
CIN
Input Capacitance
VIN = 0V
6
10
pF
CI/O
I/O Capacitance
VOUT = 0V
8
12
pF
OE
T/R
Outputs
L
L
L
H
Bus B Data to Bus A
Bus A Data to Bus B
H
X
High Z State
NOTE:
1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level
CAPACITANCE (TA = +25°C, F = 1.0MHz)
Parameter(1)
Description
Output Enable Input (Active LOW)
Transmit/Recieve Input
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
FUNCTION TABLE(1)
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability. No terminal voltage may exceed
Vcc by +0.5V unless otherwise noted.
2. Input and Vcc terminals only.
3. Output and I/O terminals only.
Symbol
13
PIN DESCRIPTION
Commercial
with Respect to GND
VTERM(3)
19
LCC
TOP VIEW
ABSOLUTE MAXIMUM RATINGS(1)
Rating
20
18
4
CERDIP/ SOIC
TOP VIEW
Symbol
OE
A1
B5
OE
VCC
19
B6
2
T/R
A0
INDEX
B7
VCC
A0
20
GND
1
A7
T/R
A1
PIN CONFIGURATION
NOTE:
1. This parameter is measured at characterization but not tested.
2
IDT54/74FCT245/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: VLC = 0.2V; VHC = VCC - 0.2V
Commercial: TA = 0°C to +70°C, VCC = 5.0V ±5%, Military: TA = -55°C to +125°C, VCC = 5.0V ±10%
Symbol
Test Conditions(1)
Parameter
Min.
Typ.(2)
Max.
Unit
VIH
Input HIGH Level
Guaranteed Logic HIGH Level
2
—
—
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
—
—
0.8
V
IIH
Input HIGH Current
VCC = Max.
IIL
Input LOW Current
IOZH
VI = VCC
—
—
5
VI = 2.7V
—
—
5(4)
VI = 0.5V
—
—
–5(4)
VI = GND
—
—
–5
VO = VCC
VO = 2.7V
VO = 0.5V
VO = GND
—
—
—
—
–0.7
15
15(4)
–15(4)
–15
–1.2
VCC = Max.
IOZL
Off State (High Impedance)
Output Current
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
—
—
—
—
—
IOS
Short Circuit Current
VCC = Max., VO = GND(3)
–60
–120
—
VOH
Output HIGH Voltage
VCC = 3V, VIN = VLC or VHC, IOH = –32µA
VCC = Min
IOH = –300µA
VIN = VIH or VIL
IOH = –12mA MIL
IOH = –15mA COM'L
VCC = 3V, VIN = VLC or VHC, IOL = 300µA
VCC = Min
IOL = 300µA
VIN = VIH or VIL
IOL = 32mA MIL
IOL = 48mA COM'L
VHC
VHC
2.4
2.4
—
—
—
—
VCC
VCC
4.3
4.3
GND
GND
0.3
0.3
—
—
—
—
VLC
VLC(4)
0.55
0.55
VOL
Output LOW Voltage
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient and maximum loading.
3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not ttested.
3
µA
µA
V
mA
V
V
IDT54/74FCT245/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
VLC = 0.2V; VHC = VCC - 0.2V
Min.
Typ.(2)
Max.
Unit
VCC = Max.
VIN ≥ VHC; VIN ≤ VLC
—
0.2
1.5
mA
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
—
0.5
2
mA
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
OE = GND
T/R = GND or VCC
One Input Toggling
50% Duty Cycle
VIN ≥ VHC
VIN ≤ VLC
—
0.15
0.25
mA/
MHz
Total Power Supply Current(6)
VCC = Max.
Outputs Open
fI = 10MHz
VIN ≥ VHC
VIN ≤ VLC
(FCT)
—
2
4
mA
50% Duty Cycle
T/R = OE = GND
VIN = 3.4V
VIN = GND
—
2.3
5
VCC = Max.
Outputs Open
fI = 2.5MHz
VIN ≥ VHC
VIN ≤ VLC
(FCT)
—
3.5
6.5(5)
50% Duty Cycle
T/R = OE = GND
VIN = 3.4V
VIN = GND
—
5.5
14.5(5)
Symbol
Parameter
ICC
Quiescent Power Supply Current
∆ICC
ICCD
IC
Test Conditions(1)
One Bit Toggling
Eight Bits Toggling
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of ∆ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
ICC = Quiescent Current
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for register devices (zero for non-register devices)
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
4
IDT54/74FCT245/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B(3)
Output Disable Time
T/R to A or B(3)
Condition(1)
CL = 50pF
RL = 500Ω
54FCT245
Mil.
Min.(2)
Max.
1.5
7.5
54/74FCT245A
Com'l.
Mil.
Min.(2)
Max.
Min.(2)
Max.
1.5
4.6
1.5
4.9
74FCT245C
Com'l.
Min.(2) Max.
1.5
4.1
Unit
ns
1.5
10
1.5
6.2
1.5
6.5
1.5
5.8
ns
1.5
10
1.5
5
1.5
6
1.5
4.8
ns
1.5
10
1.5
6.2
1.5
6.5
1.5
5.8
ns
1.5
10
1.5
5
1.5
6
1.5
4.8
ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not tested.
5
IDT54/74FCT245/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
V CC
SWITCH POSITION
7.0V
500Ω
V OUT
VIN
Pulse
Generator
D.U.T
.
50pF
RT
500Ω
CL
Test
Switch
Open Drain
Disable Low
Enable Low
Closed
All Other Tests
Open
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Octal link
Test Circuits for All Outputs
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
3V
1.5V
0V
3V
1.5V
0V
tREM
tSU
LOW-HIGH-LOW
PULSE
tW
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
3V
1.5V
0V
tH
1.5V
1.5V
Octal link
Pulse Width
Octal link
Set-Up, Hold, and Release Times
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
VOH
1.5V
VOL
DISABLE
3V
1.5V
0V
CONTROL
INPUT
tPZL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
OUTPUT
NORMALLY
HIGH
Octal link
Propagation Delay
SWITCH
CLOSED
tPZH
SWITCH
OPEN
tPLZ
3.5V
3.5V
1.5V
0.3V
VOL
tPHZ
0.3V
1.5V
0V
Enable and Disable Times
VOH
0V
Octal link
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; ZO ≤ 50Ω; tF ≤ 2.5ns; tR ≤ 2.5ns.
6
IDT54/74FCT245/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
FCT
IDT
XX
XXXX
Temp. Range
Device Type
XX
Package
X
Process
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
Blank
B
Commercial
MIL-STD-883, Class B
SO
Commercial Options
Small Outline IC
D
L
Military Options
CERDIP
Leadless Chip Carrier
245
245A
245C
Octal Bidirectional Transceiver
54
74
– 55°C to +125°C
0°C to +70°C
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
7
for Tech Support:
[email protected]
(408) 654-6459
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