IDT IDT74FCT645ATPY Fast cmos octal bidirectional transceiver Datasheet

IDT74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVER
IDT74FCT645T/AT/CT/DT
FEATURES:
DESCRIPTION:
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−
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The IDT octal bidirectional transceivers are built using an advanced dual
metal CMOS technology. The FCT645T 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.
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−
−
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Low input and output leakage ≤1µ A (max.)
CMOS power levels
True TTL input and output compatibility
• VOH = 3.3V (typ.)
• VOL = 0.3V (typ.)
Meets or exceeds JEDEC standard 18 specifications
Available in SOIC, and SSOP packages
Std., A, C and D speed grades
High drive outputs (-15mA IOH, 64mA IOL)
FUNCTIONAL BLOCK DIAGRAM
T/R
OE
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
INDUSTRIAL TEMPERATURE RANGE
AUGUST 2000
1
c
1999 Integrated Device Technology, Inc.
DSC-5512/-
IDT74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
T/R
1
20
V CC
A0
2
19
OE
A1
3
18
B0
A2
4
17
B1
A3
5
16
B2
A4
6
15
B3
SO20-2
SO20-7
Symbol
VTERM(2)
Rating
Terminal Voltage with Respect to GND
Max.
–0.5 to +7
Unit
V
VTERM(3)
Terminal Voltage with Respect to GND
–0.5 to VCC+0.5
V
TSTG
Storage Temperature
–65 to +150
°C
IOUT
DC Output Current
–60 to +120
mA
8T-link
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. Inputs and Vcc terminals only.
3. Outputs and I/O terminals only.
7
14
B4
A6
8
13
B5
A7
9
12
B6
A5
GND
10
11
CAPACITANCE (TA = +25OC, f = 1.0MHz)
Symbol
CIN
Parameter(1)
Input Capacitance
Conditions
VIN = 0V
Typ.
6
Max.
10
COUT
Output Capacitance
VOUT = 0V
8
12
Unit
pF
pF
8T-link
B7
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
SOIC/ SSOP
TOP VIEW
Pin Names
OE
Description
Output Enable Input (Active LOW)
T/R
Transmit/Receive Input
A0-A7
Side A Inputs or 3-State Outputs
B0-B7
Side B Inputs or 3-State Outputs
FUNCTION TABLE
(1)
Inputs
OE
T/R
L
L
Bus B Data to Bus A
L
H
Bus A Data to Bus B
H
X
High Z State
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
2
Outputs
IDT74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5%
Symbol
VIH
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
VIL
Input LOW Level
Guaranteed Logic LOW Level
IIH
Input HIGH Current(4)
VCC = Max.
IIL
Input LOW Current(4)
IOZH
High Impedance Output Current
IOZL
(3-State output pins) (4)
—
—
±1
II
Input HIGH Current
VCC = Max., VI = VCC (Max.)
—
—
±1
µA
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
—
–0.7
–1.2
V
VH
Input Hysteresis
ICC
Quiescent Power Supply Current
VCC = Max.
Min.
2
Typ.(2)
—
Max.
—
Unit
V
—
—
0.8
V
VI = 2.7V
—
—
±1
µA
VI = 0.5V
—
—
±1
VO = 2.7V
—
—
±1
VO = 0.5V
µA
—
—
200
—
mV
VCC = Max., VIN = GND or VCC
—
0.01
1
µA
Min.
2.4
Typ.(2)
3.3
Max.
—
Unit
V
OUTPUT DRIVE CHARACTERISTICS
Symbol
VOH
Parameter
Output HIGH Voltage
VOL
Output LOW Voltage
IOS
Short Circuit Current
Test Conditions(1)
IOH = –8mA
VCC = Min.
VIN = VIH or VIL
IOH = –15mA
2
3
—
VCC = Min.
VIN = VIH or VIL
VCC = Max, VO = GND (3)
IOL = 64mA
—
0.3
0.55
V
–60
–120
–225
mA
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 and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. The test limit for thie parameter is ±5µA at TA = -55°C.
3
IDT74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
∆ICC
ICCD
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current(4)
IC
Total Power Supply Current(6)
Test Conditions(1)
VCC = Max.
VIN = 3.4V(3)
VCC = Max.
Outputs Open
OE = T/R = GND
One Input Toggling
50% Duty Cycle
VCC = Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
OE = T/R = GND
One Bit Toggling
VCC = Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
OE = T/R = GND
Eight Bits Toggling
Min.
—
Typ.(2)
0.5
Max.
2
Unit
mA
VIN = VCC
VIN = GND
—
0.15
0.25
mA/
MHz
VIN = VCC
VIN = GND
—
1.5
3.5
mA
VIN = 3.4
VIN = GND
—
1.8
4.5
VIN = VCC
VIN = GND
—
3
6(5)
VIN = 3.4
VIN = GND
—
5
14(5)
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 CHARACTRISTICS OVER OPERATING RANGE
FCT645T
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)
Conditions(1)
Min.(2)
CL = 50 pF
RL = 500Ω
FCT645AT
1.5
Max.
9.5
Min.(2)
1.5
FCT645CT
FCT645DT
1.5
Max.
4.6
Min.
1.5
Max.
4.1
Min.(2)
1.5
Max.
3.8
Unit
ns
11
1.5
6.2
1.5
5.8
1.5
5
ns
1.5
12
1.5
5
1.5
4.8
1.5
4.3
ns
1.5
11
1.5
6.2
1.5
5.8
1.5
5
ns
1.5
12
1.5
5
1.5
4.8
1.5
4.3
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.
4
(2)
IDT74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
V CC
Test
7.0V
Switch
Open Drain
Disable Low
500 Ω
V OUT
V IN
Pulse
Generator
Enable Low
All Other Tests
D.U.T.
50pF
R
Closed
T
C
Open
8-link
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
500 Ω
L
O ctal lin k
PULSE WIDTH
SET-UP, HOLD, AND RELEASE TIMES
3V
1.5V
0V
3V
1.5V
0V
DATA
INPUT
tH
t SU
TIM ING
INPUT
ASYNCHRONOUS C ONTROL
PRES ET
CLEAR
ETC.
SYNCHRO NOUS CONTRO L
PRES ET
CLEAR
CLOCK ENABLE
ETC.
t REM
t SU
LO W -HIGH-LOW
PULSE
1.5V
tW
3V
1.5V
0V
HIGH-LOW -HIGH
PULSE
1.5V
3V
1.5V
0V
tH
O ctal lin k
O ctal lin k
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENAB LE
SAM E PHASE
INPUT TRANSITION
t PLH
t PH L
OUTPUT
t PLH
OPPOSITE P HASE
INPUT TRANSITION
t PH L
3V
1.5V
0V
DISA BLE
3V
CO NTROL
INPUT
1.5V
t PZL
V OH
1.5V
V OL
OUTPUT
NO RM A LLY
LO W
3V
1.5V
0V
SW ITCH
CLOSE D
O ctal lin k
SW ITCH
OPEN
3.5V
3.5V
1.5V
0.3V
t PZH
OUTPUT
NO RM A LLY
HIGH
0V
t PLZ
V OL
t PHZ
0.3V
V OH
1.5V
0V
0V
O ctal lin k
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns
5
IDT74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT
XX
Temperature
Range
FCT
X
X
Device
Type
Package
SO
PY
Small Outline IC (SO20-2)
Shrink Small Outline Package (SO20-7)
645T
645AT
645CT
645DT
Octal Bidirectional Transceiver
74
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