TI SN74AUCH245RGYR

SCES420 – JANUARY 2003
D Optimized for 1.8-V Operation and Is 3.6-V
D
D
A1
A2
A3
A4
A5
A6
A7
A8
DIR
VCC
1
20
19 OE
18 B1
2
3
17 B2
16 B3
4
5
15 B4
14 B5
6
7
13 B6
12 B7
8
9
10
11
B8
D
D
D
D
D
I/O Tolerant to Support Mixed-Mode Signal
Operation
Ioff Supports Partial-Power-Down Mode
Operation
Sub 1-V Operable
Max tpd of 2 ns at 1.8 V
Low Power Consumption, 20-µA Max ICC
±8-mA Output Drive at 1.8 V
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
GND
D
RGY PACKAGE
(TOP VIEW)
description/ordering information
This octal bus transceiver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1.65-V to 1.95-V
VCC operation.
The SN74AUCH245 is designed for asynchronous communication between data buses. The device transmits
data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are
effectively isolated.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 85°C QFN – RGY
Tape and reel
SN74AUCH245RGYR
MT245
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  2003, Texas Instruments Incorporated
! "#$ ! %#&'" ( $)
(#" ! " !%$"" ! %$ *$ $! $+! ! #$ !
! (( , -) (#" %"$!!. ($! $"$!!'- "'#($
$! . '' %$ $!)
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1
SCES420 – JANUARY 2003
FUNCTION TABLE
INPUTS
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
logic diagram (positive logic)
DIR
1
19
A1
OE
2
18
B1
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 3.6 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 3.6 V
Voltage range applied to any output in the high-impedance or power-off state, VO
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 3.6 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θJA (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-5.
2
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recommended operating conditions (see Note 3)
VCC
VIH
Supply voltage
High-level
High
level input
in ut voltage
VCC = 0.8 V
VCC = 1.1 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 0.8 V
VIL
Low-level
Low
level input
in ut voltage
VI
Input voltage
VO
O tp t voltage
Output
oltage
High-level
High
level out
output
ut current
∆t/∆v
Low-level
Low
level out
output
ut current
0.8
2.7
VCC
0.65 × VCC
UNIT
V
V
1.7
0
0.35 × VCC
V
0.7
0
3.6
V
Active state
0
3-state
0
VCC
3.6
V
VCC = 1.4 V
VCC = 1.65 V
VCC = 2.3 V
VCC = 0.8 V
IOL
MAX
VCC = 1.1 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 0.8 V
VCC = 1.1 V
IOH
MIN
–0.7
–3
–5
–9
0.7
VCC = 1.1 V
VCC = 1.4 V
3
VCC = 1.65 V
VCC = 2.3 V
8
Input transition rise or fall rate
mA
–8
5
mA
9
20
ns/V
TA
Operating free-air temperature
–40
85
°C
NOTE 3: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
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SCES420 – JANUARY 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = –100 µA
IOH = –0.7 mA
VOH
VOL
II
IBHL‡
IBHH§
IBHLO¶
All inputs
TYP†
VCC
MIN
0.8 V to 2.7 V
VCC–0.1
0.8 V
MAX
0.55
IOH = –3 mA
IOH = –5 mA
1.1 V
0.8
1.4 V
1
IOH = –8 mA
IOH = –9 mA
1.65 V
1.2
2.3 V
1.8
IOL = 100 µA
IOL = 0.7 mA
0.8 V to 2.7 V
V
0.2
0.8 V
0.25
IOL = 3 mA
IOL = 5 mA
1.1 V
0.3
1.4 V
0.4
IOL = 8 mA
IOL = 9 mA
1.65 V
0.45
2.3 V
0.6
0 to 2.7 V
±5
VI = VCC or GND
VI = 0.35 V
1.1 V
10
1.4 V
15
1.65 V
20
VI = 0.7 V
VI = 0.8 V
2.3 V
40
1.1 V
–5
VI = 0.9 V
VI = 1.07 V
1.4 V
–15
1.65 V
–20
VI = 1.7 V
2.3 V
–40
1.3 V
75
VI = 0.47 V
VI = 0.57 V
VI = 0 to VCC
IBHHO#
VI = 0 to VCC
Ioff
IOZ||
VI or VO = 2.7 V
VO = VCC or GND
ICC
Ci
VI = VCC or GND,
VI = VCC or GND
1.6 V
125
1.95 V
175
2.7 V
275
1.3 V
–75
1.6 V
–125
1.95 V
–175
2.7 V
–275
µA
A
µA
A
0.8 V to 2.7 V
2.5 V
µA
µA
A
2.7 V
Cio
V
A
µA
0
IO = 0
UNIT
2.5
±10
µA
±10
µA
20
µA
3
pF
VO = VCC or GND
2.5 V
8
8.5
pF
† All typical values are at TA = 25°C.
‡ The bus-hold circuit can sink at least the minimum low sustaining current at VIL max. IBHL should be measured after lowering VIN to GND and
then raising it to VIL max.
§ The bus-hold circuit can source at least the minimum high sustaining current at VIH min. IBHH should be measured after raising VIN to VCC and
then lowering it to VIH min.
¶ An external driver must source at least IBHLO to switch this node from low to high.
# An external driver must sink at least IBHHO to switch this node from high to low.
|| For I/O ports, the parameter IOZ includes the input leakage current.
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switching characteristics over recommended operating free-air temperature range, CL = 15 pF
(unless otherwise noted) (see Figure 1)
FROM
(INPUT)
TO
(OUTPUT)
tpd
A or B
ten
tdis
PARAMETER
VCC = 0.8 V
VCC = 1.2 V
± 0.1 V
VCC = 1.5 V
± 0.1 V
VCC = 1.8 V
± 0.15 V
VCC = 2.5 V
± 0.2 V
UNIT
TYP
MIN
MAX
MIN
MAX
MIN
TYP
MAX
MIN
MAX
B or A
5
1
3.2
0.6
2
0.5
1
1.7
0.4
1.4
ns
OE
A or B
9
1.2
4.9
1
3
0.8
1.2
2.4
0.6
1.8
ns
OE
A or B
9.5
1.9
5.7
1.2
4
0.9
1.9
4.1
0.6
2.9
ns
switching characteristics over recommended operating free-air temperature range, CL = 30 pF
(unless otherwise noted) (see Figure 1)
FROM
(INPUT)
TO
(OUTPUT)
tpd
A or B
ten
tdis
PARAMETER
VCC = 1.8 V
± 0.15 V
VCC = 2.5 V
± 0.2 V
UNIT
MIN
TYP
MAX
MIN
MAX
B or A
0.6
1.3
2.2
0.5
1.8
ns
OE
A or B
1.1
1.5
3
1.1
2.4
ns
OE
A or B
1.6
2.2
4
0.8
2.6
ns
operating characteristics, TA = 25°C
PARAMETER
Cpd
d
Power
dissipation
capacitance
TEST
CONDITIONS
Outputs
enabled
Outputs
disabled
VCC = 0.8 V
TYP
VCC = 1.2 V
TYP
VCC = 1.5 V
TYP
VCC = 1.8 V
TYP
VCC = 2.5 V
TYP
19
20
21
23
28
1
1
1
1
1
f = 10 MHz
UNIT
pF
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SCES420 – JANUARY 2003
PARAMETER MEASUREMENT INFORMATION
2 × VCC
S1
RL
From Output
Under Test
Open
GND
CL
(see Note A)
RL
VCC
0.8 V
1.2 V ± 0.1 V
1.5 V ± 0.1 V
1.8 V ± 0.15 V
2.5 V ± 0.2 V
1.8 V ± 0.15 V
2.5 V ± 0.2 V
LOAD CIRCUIT
TEST
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCC
GND
CL
RL
15 pF
15 pF
15 pF
15 pF
15 pF
30 pF
30 pF
2 kΩ
2 kΩ
2 kΩ
2 kΩ
2 kΩ
1 kΩ
500 Ω
V∆
0.1 V
0.1 V
0.1 V
0.15 V
0.15 V
0.15 V
0.15 V
VCC
Timing Input
VCC/2
0V
tw
tsu
VCC
VCC/2
Input
VCC/2
th
VCC
VCC/2
Data Input
VCC/2
0V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC
VCC/2
Input
VCC/2
0V
tPHL
tPLH
VOH
VCC/2
Output
VCC/2
VOL
VCC/2
VCC/2
VCC/2
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VCC/2
0V
tPLZ
tPZL
VCC
VCC/2
Output
Waveform 2
S1 at GND
(see Note B)
VOL + V∆
VOL
tPHZ
tPZH
VOH
Output
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPLH
tPHL
VCC
Output
Control
VCC/2
VOH – V∆
VOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, slew rate ≥ 1 V/ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
H. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
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