ETC 74VCXH245/D

74VCXH245
Low−Voltage 1.8/2.5/3.3V
8−Bit Transceiver
(3-State, Non-Inverting with Bushold)
The 74VCXH245 is an advanced performance, non-inverting 8-bit
transceiver. It is designed for very high-speed, very low-power
operation in 1.8 V, 2.5 V or 3.3 V systems.
The 74VCXH245 is designed as a byte control. The
Transmit/Receive (T/Rn) inputs determine the direction of data flow
through the bi- directional transceiver. Transmit (active- HIGH)
enables data from A ports to B ports; Receive (active-LOW) enables
data from B to A ports. The Output Enable input (OE), when HIGH,
disables both A and B ports by placing them in a HIGH Z condition.
The data inputs include active bushold circuitry, eliminating the need
for external pull-up resistors to hold unused or floating inputs at a
valid logic state.
• Designed for Low Voltage Operation: VCC = 1.65-3.6 V
• High Speed Operation: 3.5 ns max for 3.0 to 3.6 V
•
•
•
•
•
4.2 ns max for 2.3 to 2.7 V
8.4 ns max for 1.65 to 1.95 V
Static Drive: ±24 mA Drive at 3.0 V
±18 mA Drive at 2.3 V
±6 mA Drive at 1.65 V
Includes Active Bushold to Hold Unused or Floating Data Inputs at a
Valid Logic State
Near Zero Static Supply Current in All Three Logic States (20 A)
Substantially Reduces System Power Requirements
Latchup Performance Exceeds ±200 mA @ 85°C
ESD Performance: Human Body Model >2000 V; Machine Model >200 V
 Semiconductor Components Industries, LLC, 2003
April, 2003 - Rev. 7
1
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MARKING
DIAGRAMS
(Top View)
1 20
DQFN
SUFFIX TBD
CASE 485AA
A
WL
YY
WW
VCXH
245
ALYW
= Assembly Location
= Wafer Lot
= Year
= Work Week
Publication Order Number:
74VCXH245/D
74VCXH245
OE 19
19
12
T/R 1
11
20
DQFN
PIN #1
A0
10
2
18
2
9
A1
3
17
Figure 1. Pinout (Top View)
A2
A3
PINS
FUNCTION
OE
T/R
A0-A7
B0-B7
Output Enable Input
Transmit/Receive Input
Side A Bushold Inputs or 3-State Outputs
Side B Bushold Inputs or 3-State Outputs
13
OE
T/R
OPERATING MODE
Non-Inverting
L
L
B Data to A Bus
L
H
A Data to B Bus
H
X
Z State
A6
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2
B6
9
11
H = High Voltage Level
L = Low Voltage Level
Z = High Impedance State
X = High or Low Voltage Level and Transitions are Acceptable
B5
8
12
A7
B4
7
TRUTH TABLE
INPUTS
B3
6
14
A5
B2
5
15
A4
B1
4
16
PIN NAMES
B0
Figure 2. Logic Diagram
B7
74VCXH245
ABSOLUTE MAXIMUM RATINGS*
Symbol
Parameter
VCC
DC Supply Voltage
VI
Value
Condition
Unit
-0.5 to + 4.6
V
DC Input Voltage
-0.5 ≤ VI ≤ VCC + 0.5
V
VO
DC Output Voltage
-0.5 ≤ VO ≤ VCC + 0.5
Note 1
V
IIK
DC Input Diode Current
-50
VI < GND
mA
IOK
DC Output Diode Current
-50
VO < GND
mA
+50
VO > VCC
mA
IO
DC Output Source/Sink Current
±50
mA
ICC
DC Supply Current Per Supply Pin
±100
mA
IGND
DC Ground Current Per Ground Pin
±100
mA
TSTG
Storage Temperature Range
-65 to +150
°C
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or
conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute-maximum-rated conditions
is not implied.
1. IO absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS**
Symbol
Parameter
Operating
Data Retention Only
Min
Typ
Max
Unit
1.65
1.2
3.3
3.3
3.6
3.6
V
-0.3
VCC
V
0
VCC
V
VCC
Supply Voltage
VI
Input Voltage
VO
Output Voltage
IOH
HIGH Level Output Current, VCC = 3.0 V - 3.6 V
-24
mA
IOL
LOW Level Output Current, VCC = 3.0 V - 3.6 V
24
mA
IOH
HIGH Level Output Current, VCC = 2.3 V - 2.7 V
-18
mA
IOL
LOW Level Output Current, VCC = 2.3 V - 2.7 V
18
mA
IOH
HIGH Level Output Current, VCC = 1.65 V - 1.95 V
-6
mA
IOL
LOW Level Output Current, VCC = 1.65 V - 1.95 V
6
mA
TA
Operating Free-Air Temperature
-40
+85
°C
t/V
Input Transition Rise or Fall Rate, VIN from 0.8 V to 2.0 V, VCC = 3.0 V
0
10
ns/V
**Floating or unused control inputs must be held HIGH or LOW.
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74VCXH245
DC ELECTRICAL CHARACTERISTICS
TA = -40°C to +85°C
Symbol
VIH
VIL
VOH
VOL
HIGH Level Input Voltage (Note 2)
LOW Level Input Voltage (Note 2)
HIGH Level Output Voltage
LOW Level Output Voltage
II
Input Leakage Current
II(HOLD)
(
)
Minimum Bushold Input Current
II(OD)
( )
Minimum Bushold Over-Drive
Current Needed to Change State
Min
1.65 V ≤ VCC < 1.95 V
0.65 x VCC
2.3 V ≤ VCC ≤ 2.7 V
1.6
2.7 V < VCC ≤ 3.6 V
2.0
Max
V
1.65 V ≤ VCC < 1.95 V
0.35 x VCC
2.3 V ≤ VCC ≤ 2.7 V
0.7
2.7 V < VCC ≤ 3.6 V
0.8
1.65 V ≤ VCC ≤ 3.6 V; IOH = -100 A
VCC - 0.2
VCC = 1.65 V; IOH = -6 mA
1.25
VCC = 2.3 V; IOH = -6 mA
2.0
VCC = 2.3 V; IOH = -12 mA
1.8
VCC = 2.3 V; IOH = -18 mA
1.7
VCC = 2.7 V; IOH = -12 mA
2.2
VCC = 3.0 V; IOH = -18 mA
2.4
VCC = 3.0 V; IOH = -24 mA
2.2
0.2
VCC = 1.65 V; IOL = 6 mA
0.3
VCC = 2.3 V; IOL = 12 mA
0.4
VCC = 2.3 V; IOL = 18 mA
0.6
VCC = 2.7 V; IOL = 12 mA
0.4
VCC = 3.0 V; IOL = 18 mA
0.4
VCC = 3.0 V; IOL = 24 mA
0.55
VIN = VCC or GND; VCC = 3.6 V
±5.0
75
VCC = 3.0 V, VIN = 2.0 V
-75
VCC = 2.3 V, VIN = 0.7 V
45
VCC = 2.3 V, VIN = 1.6 V
-45
VCC = 1.65 V, VIN = 0.57 V
25
VCC = 1.65 V, VIN = 1.07 V
-25
VCC = 3.6 V, (Note 3)
450
VCC = 3.6 V, (Note 4)
-450
VCC = 2.7 V, (Note 3)
300
VCC = 2.7 V, (Note 4)
-300
VCC = 1.95 V, (Note 3)
200
VCC = 1.95 V, (Note 4)
-200
V
V
1.65 V ≤ VCC ≤ 3.6 V; IOL = 100 A
VCC = 3.0 V, VIN = 0.8 V
Unit
V
A
A
A
VO = VCC or GND; VCC = 3.6 V;
VI = VIH or VIL
±10
A
Quiescent Supply Current (Note 5)
1.65 V ≤ VCC ≤ 3.6 V; VI = GND or VCC
20
A
Increase in ICC per Input
2.7 V < VCC ≤ 3.6 V; VIH = VCC - 0.6 V
750
A
IOZ
3-State Output Current
ICC
ICC
2.
3.
4.
5.
Condition
Characteristic
These values of VI are used to test DC electrical characteristics only.
An external driver must source at least the specified current to switch from LOW-to-HIGH.
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Outputs disabled or 3-state only.
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74VCXH245
AC CHARACTERISTICS (Note 6; tR = tF = 2.0 ns; CL = 30 pF; RL = 500 )
Limits
TA = -40°C to +85°C
VCC = 3.0 V to 3.6 V
Symbol
Parameter
VCC = 2.3 V to 2.7 V
VCC = 1.65 V to1.95 V
Waveform
Min
Max
Min
Max
Min
Max
Unit
tPLH
tPHL
Propagation Delay
Input to Output
1
0.6
0.6
3.5
3.5
0.8
0.8
4.2
4.2
1.5
1.5
8.4
8.4
ns
tPZH
tPZL
Output Enable Time to
High and Low Level
2
0.6
0.6
4.5
4.5
0.8
0.8
5.6
5.6
1.5
1.5
9.8
9.8
ns
tPHZ
tPLZ
Output Disable Time From
High and Low Level
2
0.6
0.6
3.6
3.6
0.8
0.8
4.0
4.0
1.5
1.5
7.2
7.2
ns
tOSHL
tOSLH
Output-to-Output Skew
(Note 7)
0.75
0.75
ns
0.5
0.5
0.5
0.5
6. For CL = 50 pF, add approximately 300 ps to the AC maximum specification.
7. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH); parameter
guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
TA = +25°C
Symbol
VOLP
VOLV
VOHV
Condition
Typ
Unit
VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V
0.3
V
VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V
0.7
VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V
1.0
VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V
-0.3
VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V
-0.7
VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V
-1.0
VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V
1.3
VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V
1.7
VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V
2.0
Characteristic
Dynamic LOW Peak Voltage
(N
(Note
8))
Dynamic LOW Valley Voltage
(
(Note
8))
Dynamic HIGH Valley Voltage
(N
(Note
9))
V
V
8. Number of outputs defined as “n”. Measured with “n-1” outputs switching from HIGH-to-LOW or LOW-to-HIGH. The remaining output is
measured in the LOW state.
9. Number of outputs defined as “n”. Measured with “n-1” outputs switching from HIGH-to-LOW or LOW-to-HIGH. The remaining output is
measured in the HIGH state.
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Condition
Typical
Unit
CIN
Input Capacitance
Note 10
6
pF
COUT
Output Capacitance
Note 10
7
pF
CPD
Power Dissipation Capacitance
Note 10, 10 MHz
20
pF
10. VCC = 1.8, 2.5 or 3.3 V; VI = 0 V or VCC.
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74VCXH245
VIH
Vm
An, Bn
Vm
tPLH
0V
tPHL
Vm
Bn, An
VOH
Vm
VOL
WAVEFORM 1 − PROPAGATION DELAYS
tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
VIH
Vm
OEn, T/Rn
Vm
0V
tPZH
tPHZ
VOH
Vy
Vm
An, Bn
≈ 0V
tPZL
tPLZ
≈ VCC
Vm
An, Bn
Vx
VOL
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
Figure 3. AC Waveforms
VCC
Symbol
3.3 V ± 0.3 V
2.5 V ± 0.2 V
1.8 V ± 0.15 V
VIH
2.7 V
VCC
VCC
Vm
1.5 V
VCC/2
VCC/2
Vx
VOL + 0.3 V
VOL + 0.15 V
VOL + 0.15 V
Vy
VOH - 0.3 V
VOH - 0.15 V
VOH - 0.15 V
VCC
PULSE
GENERATOR
RL
DUT
RT
CL
RL
SWITCH
TEST
tPLH, tPHL
Open
tPZL, tPLZ
6 V at VCC = 3.3 ± 0.3 V;
VCC× 2 at VCC = 2.5 ± 0.2 V; 1.8 V ± 0.15 V
tPZH, tPHZ
GND
CL = 30 pF or equivalent (Includes jig and probe capacitance)
RL = 500 or equivalent
RT = ZOUT of pulse generator (typically 50 )
Figure 4. Test Circuit
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6
6 V or VCC × 2
OPEN
GND
74VCXH245
PACKAGE DIMENSIONS
D
DQFN
SUFFIX TBD
CASE 485AA-01
ISSUE O
A
B
PIN ONE REFERENCE
DIM
A
A1
A2
A3
b
D
D2
E
E2
e
K
L
E
2X
0.15 C
2X
0.15 C
0.10 C
A2
20X
A
0.08 C
SEATING
PLANE
(A3)
A1
C
D2
e
11
20X
L
9
12
e
E2
20X
b
0.10 C A B
0.05 C
NOTE 3
20X
K
19
2
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSIONS b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
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MILLIMETERS
MIN
MAX
0.80
1.00
0.00
0.05
0.65
0.75
0.20 REF
0.20
0.30
2.50 BSC
0.85
1.15
4.50 BSC
1.85
2.15
0.50 BSC
0.20
−−−
0.35
0.45
74VCXH245
Xmax = 0.28
0.5
Pitch
0.65
1.45
2.8
3.45
All Dimensions in mm.
4.80
Figure 5. 20 Pad DQFN Suggested Board Layout (Bottom View)
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74VCXH245/D