IDT54FCT623CT [IDT]
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE); 快速CMOS八路总线收发器（ 3 -STATE ）
| 型号： | IDT54FCT623CT |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE) |
| 文件： | 总6页 (文件大小：106K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL
BUS TRANSCEIVERS
(3-STATE)
Integrated Device Technology, Inc.
DESCRIPTION
FEATURES:
The FCT623T/AT/CT is a non-inverting octal transceiver
with 3-state bus-driving outputs in both the send and receive
directions.TheBbusoutputsarecapableofsinking64mAand
sourcing up to 15mA, providing very good capacitive drive
characteristics.
• Std., A and C speed grades
• Low input and output leakage ≤1µA (max.)
• CMOS power levels
• True TTL input and output compatibility
– VOH = 3.3V (typ.)
These octal bus transceivers are designed for asynchro-
noustwo-waycommunicationbetweendatabuses.Thecontrol
function implementation allows for maximum flexibility in
timing.
One important feature of the FCT623T/AT/CT is the Power
Down Disable capability. When the GAB and GBA inputs are
conditioned to put the device in high-Z state, the I/O ports will
maintain high impedance during power supply ramps and
when VCC = 0V. This is a desirable feature in back-plane
applications where it may be necessary to perform “live”
insertion and removal of cards for on-line maintenance. It is
also a benefit in systems with multiple redundancy where one
or more redundant cards may be powered-off.
– VOL = 0.3V (typ.)
• High drive outputs (-15mA IOH, 64mA IOL)
• Power off disable outputs permit “live insertion”
• 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, CERPACK and LCC packages
FUNCTIONAL BLOCK DIAGRAM
GBA
GAB
B1
A1
B2 - B8
A2 - A8
7 other transceivers
2563 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
NOVEMBER 1995
1996 Integrated Device Technology, Inc.
6.19
DSC-2563/5
1
1
IDT54/74FCT623T/AT/CT
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
PIN CONFIGURATIONS
INDEX
1
20
19
18
17
16
15
14
13
12
11
VCC
GBA
B1
GAB
A1
2
3
4
A2
A3
3
2
20 19
1
B2
B3
B4
4
5
6
7
8
18
B1
B2
B3
B4
B5
P20-1
D20-1
SO20-2
&
A3
A4
A5
A6
A7
5
17
16
15
14
A4
A5
6
L20-2
7
B5
B6
A6
A7
E20-1
8
9 10 11 12 13
9
A8
GND
B7
B8
10
2563 drw 03
2563 drw 02
DIP/SOIC/CERPACK
TOP VIEW
LCC
TOP VIEW
ABSOLUTE MAXIMUM RATINGS(1)
DEFINITION OF FUNCTIONAL TERMS
Symbol
Rating
Commercial
Military
Unit
Pin Names
Description
(2)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to +7.0 –0.5 to +7.0
V
GBA, GAB
Enable Inputs
A1 - A8
B1 - B8
A Bus Inputs or 3-State Outputs
B Bus Inputs or 3-State Outputs
(3)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to
VCC +0.5
–0.5 to
VCC +0.5
V
2563 tbl 01
TA
Operating
0 to +70
–55 to +125 °C
FUNCTION TABLE(1)
Temperature
Temperature
Under Bias
Storage
Temperature
Power Dissipation
TBIAS
TSTG
–55 to +125 –65 to +135 °C
–55 to +125 –65 to +150 °C
Enable Inputs
BA
G
L
GAB
Outputs
L
H
L
B data to A bus
A data to B bus
Z
H
PT
0.5
0.5
W
H
IOUT
DC Output
Current
–60 to +120 –60 to +120 mA
L
H
B data to A bus
A data to B bus
2563 lnk 03
NOTES:
NOTES:
1. H = HIGH Voltage Level
2. L = LOW Volage Level
2563 tbl 02
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
onlyandfunctionaloperationofthedeviceattheseoranyotherconditions
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.
3. Z = High-Impedance (OFF) state
2. Input and VCC terminals only.
3. Outputs and I/O terminals only.
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol
Parameter(1)
Conditions Typ. Max. Unit
CIN
Input
VIN = 0V
6
10
pF
Capacitance
Output
COUT
VOUT = 0V
8
12
pF
Capacitance
2563 lnk 04
NOTE:
1. This parameter is measured at characterization but not tested.
6.19
2
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
Parameter
Input HIGH Level
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VIH
Guaranteed Logic HIGH Level
2.0
—
—
—
—
0.8
±1
V
VIL
II H
II L
Input LOW Level
Guaranteed Logic LOW Level
VCC = Max., VI = 2.7V
V
µA
µA
µA
V
Input HIGH Current(5)
Input LOW Current(5)
Input HIGH Current(5)
Clamp Diode Voltage
Short Circuit Current
—
—
VCC = Max., VI = 0.5V
—
—
±1
II
VCC = Max., VI = VCC (Max.)
VCC = Min., IN = –18mA
VCC = Max.(3), VO = GND
—
—
±1
VIK
IOS
VOH
—
–0.7
–1.2
–60
2.4
–120 –225
mA
V
Output HIGH Voltage
(A and B Bus)
VCC = Min.
IOH = –6mA MIL.
3.3
3.0
0.3
0.3
—
VIN = VIH or VIL
IOH = –8mA COM'L.
IOH = –12mA MIL.
IOH = –15mA COM'L.
IOL = 32mA MIL.(4)
IOL = 48mA COM'L.
IOL = 48mA MIL.(4)
IOL = 64mA COM'L.
2.0
—
—
V
V
V
VOL
VOL
Output LOW Voltage (A Bus)
Output LOW Voltage (B Bus)
VCC = Min.
0.5
0.55
VIN = VIH or VIL
VCC = Min.
VIN = VIH or VIL
—
IOFF
VH
Input/Output Power Off Leakage(6) VCC = 0V, VIN or VO ≤ 4.5V
—
—
—
—
±1
—
1
µA
Input Hysteresis
—
200
0.01
mV
ICC
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
µA
NOTES:
2563 tbl 05
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. These are maximum IOL values per output, for 8 outputs turned on simultaneously. Total maximum IOL (all outputs) is 512mA for commercial and 384mA
for military. Derate IOL for number of outputs exceeding 8 turned on simultaneously.
5. The test limit for this parameter is ±5µA at TA = –55°C.
6. This parameter is guaranteed but not tested.
6.19
3
IDT54/74FCT623T/AT/CT
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VCC = Max.
VIN = 3.4V(3)
VCC = Max.
Outputs Open
∆ICC
—
—
0.5
2.0
mA
ICCD
Dynamic Power Supply
Current(4)
VIN = VCC
VIN = GND
0.15
0.25
mA/
MHz
GBA = GAB = GND
One Input Toggling
50% Duty Cycle
VCC = Max.
Outputs Open
fi = 10MHz
IC
Total Power Supply Current(6)
VIN = VCC
VIN = GND
—
—
—
—
1.5
1.8
3.0
5.0
3.5
4.5
mA
50% Duty Cycle
GBA = GAB = GND
One Bit Toggling
VCC = Max.
Outputs Open
fi = 2.5MHz
VIN = 3.4V
VIN = GND
VIN = VCC
VIN = GND
6.0(5)
14.0(5)
50% Duty Cycle
GBA = GAB = GND
Eight Bits Toggling
VIN = 3.4V
VIN = GND
2563 tbl 07
NOTES:
1. For conditions shown as Max. or Min., 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 the 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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
54/74FCT623T
Com'l. Mil.
Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max.
Unit
54/74FCT623AT
54/74FCT623CT
Com'l. Mil.
Com'l. Mil.
Symbol
tPLH
Parameter
Propagation Delay
An to Bn
Condition(1)
CL = 50pF
RL = 500Ω
1.5 7.5 1.5 9.0 1.5 5.5 1.5 6.3 1.5 4.8 1.5 5.4 ns
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay
Bn to An
1.5 7.5 1.5 9.5 1.5 5.5 1.5 6.3 1.5 4.8 1.5 5.4 ns
1.5 9.0 1.5 10.0 1.5 7.0 1.5 8.0 1.5 6.1 1.5 6.9 ns
1.5 8.0 1.5 9.0 1.5 6.5 1.5 7.4 1.5 5.6 1.5 6.4 ns
1.5 9.0 1.5 10.5 1.5 7.0 1.5 8.0 1.5 6.1 1.5 6.9 ns
Output Enable Time
GBA to An
Output Disable Time
GBA to An
Output Enable Time
GAB to Bn
Output Disable Time
GAB to Bn
1.5 8.0 1.5 9.0 1.5 6.5 1.5 7.4 1.5 5.6 1.5 6.4 ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays
2563 tbl 07
6.19
4
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
Test
Switch
VCC
Open Drain
Disable Low
7.0V
Closed
500Ω
500Ω
Enable Low
VOUT
VIN
Open
All Other Tests
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
2563 lnk 09
Pulse
Generator
D.U.T.
50pF
C L
Generator.
T
R
2563 drw 05
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
PULSE
tH
tSU
1.5V
1.5V
3V
1.5V
0V
TIMING
INPUT
tW
ASYNCHRONOUS CONTROL
tREM
PRESET
3V
1.5V
0V
CLEAR
HIGH-LOW-HIGH
PULSE
ETC.
SYNCHRONOUS CONTROL
PRESET
3V
2563 drw 07
1.5V
0V
CLEAR
tSU
tH
CLOCK ENABLE
ETC.
2563 drw 06
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
1.5V
0V
3V
SAME PHASE
CONTROL
INPUT
1.5V
0V
INPUT TRANSITION
tPLH
tPHL
tPHL
tPZL
tPLZ
VOH
1.5V
VOL
OUTPUT
3.5V
1.5V
3.5V
VOL
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
tPLH
0.3V
0.3V
3V
1.5V
0V
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
2563 drw 08
0V
2563 drw 09
NOTES:
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
6.19
5
IDT54/74FCT623T/AT/CT
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
ORDERING INFORMATION
XXXX
X
X
IDT
XX
FCT
X
Device Type
Package
Process
Temp. Range
Family
Blank
B
Commercial
MIL-STD-883, Class B
P
Plastic DIP
D
CERDIP
SO
L
E
Small Outline IC
Leadless Chip Carrier
CERPACK
623T
Octal Bus Transceiver (Inverting)
623AT
623CT
Octal Bus Transceiver (Non-Inverting)
Blank
High Drive
54
74
–55
°C to +125°C
0°
C to +70°C
6.19
6
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