74LVC4245
Octal dual supply translating transceiver; 3-state
Draft datasheet, Rev. 1.0
Aug 08, 2024
1.General Description
The 74LVC4245is an octal dual supply translating transceiver featuring 3-state bus compatible
outputs in both send and receive directions. It is designed to interface between a 3 V and 5 V
bus in a mixed 3 V and 5 V supply environment. The device features an output enable input (OE)
and a send/receive input (DIR) for direction control. A HIGH on OE causes the outputs to
assume a high-impedance OFF-state, effectively isolating the buses. In suspend mode, when
either supply is zero, there is no current path between supplies. VCCA ≥ VCCB, except in suspend
mode. Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall
times.
2.Features and Benefits
Wide supply voltage range
•
VCC(A): 1.2 V to 5.5 V
•
VCC(B): 1.2 V to 5.5 V
High noise immunity
Complies with JEDEC standards:
•
JESD8-7 (1.2 V to 1.95 V)
•
JESD8-5 (1.8 V to 2.7 V)
•
JESD8C (2.7 V to 3.6 V)
•
JESD36 (4.5 V to 5.5 V)
Suspend mode
Latch-up performance exceeds 250 mA
±24 mA output drive (VCC = 3.0 V)
Inputs accept voltages up to 5.5 V
Low power consumption: 30 μA maximum ICC
IOFF circuitry provides partial Power-down mode operation
ESD protection:
Rev. 1.0 – Aug 08, 2024
1
74LVC4245
Octal dual supply translating transceiver; 3-state
Draft datasheet, Rev. 1.0
•
HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 2500 V
•
CDM ANSI/ESDA/JEDEC JS-002 Class C3 exceeds 2000 V
Aug 08, 2024
Multiple package options
Rev. 1.0 – Aug 08, 2024
2
74LVC4245
Octal dual supply translating transceiver; 3-state
3.Ordering Information
Table 1. Ordering information
Type number
74LVC4245PW
Package
Name
Description
Quantity
TSSOP-24L
plastic thin shrink small outline package; 24 leads;
body width 4.4 mm
2500
4.Function Diagram
Fig. 1. Logic symbol
Fig. 2. Logic diagram (one channel)
Rev. 1.0 – Aug 08, 2024
3
74LVC4245
Octal dual supply translating transceiver; 3-state
5.Pinning Information
5.1. Pinning
Fig. 3. Top view pin configuration TSSOP
5.2. Pin description
Table 2. Pin description
Symbol
Pin
Description
VCC(A)
1
Supply voltage A
(An inputs/outputs, OE and DIR inputs are
referenced to VCC(A))
DIR
2
Direction control
A0, A1, A2, A3, A4, A5, A6, A7
3, 4, 5, 6, 7, 8, 9, 10
Data input or output
GND [1]
11, 12, 13
Ground (0 V)
B0, B1, B2, B3, B4, B5, B6, B7
21, 20, 19, 18, 17, 16, 15, 14
Data input or output
OE
22
Output enable input (active LOW)
VCC(B)
23, 24
Supply voltage B (Bn inputs/outputs are
referenced to VCC(B))
[1] All GND pins must be connected to ground (0V).
Rev. 1.0 – Aug 08, 2024
4
74LVC4245
Octal dual supply translating transceiver; 3-state
6.Functional Description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
Supply voltage
Input
Input/output
VCC(A), VCC(B)
OE [2]
DIR [2]
An [2]
Bn [2]
1.2 V to 5.5 V
L
L
A=B
input
1.2 V to 5.5 V
L
H
input
B=A
1.2 V to 5.5 V
H
X
Z
Z
GND [1]
X
X
Z
Z
[1] If at least one of VCC(A) or VCC(B) is at GND level, the device goes into suspend mode.
[2] The An inputs/outputs, DIR and OE input circuit is referenced to VCC(A); The Bn inputs/outputs circuit is referenced to VCC(B).
7.Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function
or be operable above the recommended operating conditions and stressing the parts to these levels is
not recommended. In addition, extended exposure to stresses above the recommended operating
conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Table 4. Absolute Maximum Ratings
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND.
Symbol
Parameter
VCC(A)
Conditions
Min
Max
Unit
supply voltage A
-0.5
6.5
V
VCC(B)
supply voltage B
-0.5
6.5
V
IIK
input clamping current
VI
input voltage
IOK
output clamping current
VO
output voltage
IO
VI < 0 V
-50
[1]
-0.5
VO < 0 V
mA
6.5
-50
V
mA
[1][2][3]
-0.5
VCCO +
0.5
V
Suspend or 3-state mode
[1]
-0.5
6.5
V
output current
VO = 0 V to VCCO
[2]
±50
mA
ICC
supply current
ICC(A) or ICC(B); per VCC pin
100
mA
IGND
ground current
per GND pin
Ptot
total power dissipation
Tstg
storage temperature
Active mode
-100
-65
mA
500
mW
150
°C
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] VCCO is the supply voltage associated with the output port.
[3] VCCO + 0.5 V should not exceed 6.5 V.
Rev. 1.0 – Aug 08, 2024
5
74LVC4245
Octal dual supply translating transceiver; 3-state
8.Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation.
Recommended operating conditions are specified to ensure optimal performance to the datasheet
specifications. MDD does not recommend exceeding them or designing to Absolute Maximum Ratings.
Table 5. Recommended Operating Conditions
Symbol
Parameter
VCC(A)
Min
Max
Unit
supply voltage A
1.2
5.5
V
VCC(B)
supply voltage B
1.2
5.5
V
VI
input voltage
0
5.5
V
0
VCCO
V
0
5.5
V
-40
125
°C
20
ns/V
VCCI = 1.4 V to 1.95 V
20
ns/V
VCCI = 2.3 V to 2.7 V
20
ns/V
VCCI = 3 V to 3.6 V
10
ns/V
VCC = 4.5 V to 5.5 V
5
ns/V
VO
output voltage
Tamb
ambient temperature
Conditions
Active
[1]
Suspend or 3-state mode
VCCI
[2]
Δt/ΔV
input transition rise and fall rate
mode
=
1.2
V
[1] VCCO is the supply voltage associated with the output port.
[2] VCCI is the supply voltage associated with the input port.
Rev. 1.0 – Aug 08, 2024
6
74LVC4245
Octal dual supply translating transceiver; 3-state
9.Static Characteristics
Table 6. Static characteristics
At recommended operating conditions. Voltages are referenced to GND (ground = 0 V). Typical values
measured at Tamb = 25°C (unless otherwise noted).
Symbol
Parameter
-40 °C to +85 °C
Conditions
Min
data input
VIH
HIGH-level
input
voltage
Max
Unit
0.8VCCI
0.8VCCI
V
VCCI = 1.4 V to 1.95 V
0.65VCCI
0.65VCCI
V
VCCI = 2.3 V to 2.7 V
1.7
1.7
V
VCCI = 3 V to 3.6 V
2.2
2.2
V
0.7VCCI
0.7VCCI
V
VCCI = 1.2 V
0.8VCC(A)
0.8VCC(A)
V
VCCI = 1.4 V to 1.95 V
0.65VCC(A)
0.65VCC(A)
V
VCCI = 2.3 V to 2.7 V
1.7
1.7
V
VCCI = 3 V to 3.6 V
2.0
2.0
V
0.7VCC(A)
0.7VCC(A)
V
VCCI = 4.5 V to 5.5 V
DIR, OE input
[1]
VCCI = 1.2 V
0.2VCCI
0.2VCCI
V
VCCI = 1.4 V to 1.95 V
0.35 VCCI
0.35
VCCI
V
VCCI = 2.3 V to 2.7 V
0.7
0.7
V
VCCI = 3 V to 3.6 V
0.8
0.8
V
0.3VCCI
0.3VCCI
V
0.2VCC(A)
0.2VCC(A)
V
VCCI = 1.4 V to 1.95 V
0.35 VCC(A)
0.35
VCC(A)
V
VCCI = 2.3 V to 2.7 V
0.7
0.7
V
VCCI = 3 V to 3.6 V
0.8
0.8
V
0.3VCC(A)
0.3VCC(A)
V
VCCI = 4.5 V to 5.5 V
DIR, OE input
VCCI = 1.2 V
VCCI = 4.5 V to 5.5 V
Rev. 1.0 – Aug 08, 2024
Min
VCCI = 1.2 V
data input
LOW-level
input
voltage
Max
[1]
VCCI = 4.5 V to 5.5 V
VIL
Typ
-40 °C to +125 °C
7
74LVC4245
Octal dual supply translating transceiver; 3-state
Symbol
Parameter
Conditions
-40 °C to +85 °C
Min
Typ
-40 °C to +125 °C
Max
Min
Max
Unit
VI = VIH
IO = -100 μA;
VCCO = 1.2 V to 4.5 V
IO = -3 mA; VCCO = 1.4 V
VOH
HIGH-level
output
voltage
IO
V
IO
V
IO
V
IO
V
= -8 mA; VCCO = 1.65
= -12 mA; VCCO = 2.3
= -24 mA; VCCO = 3.0
= -32 mA; VCCO = 4.5
VCCO - 0.1
VCCO - 0.1
V
1.0
1.0
V
1.2
1.2
V
1.9
1.9
V
2.4
2.4
V
3.8
3.8
V
VI = VIL
VOL
II
IOZ
IOFF
LOW-level
output
voltage
input
leakage
current
OFF-state
output
current
power-off
leakage
current
Rev. 1.0 – Aug 08, 2024
IO = 100 μA;
VCCO = 1.2 V to 4.5 V
0.1
0.1
V
IO = 3 mA; VCCO = 1.4 V
0.3
0.3
V
IO = 8 mA; VCCO = 1.65 V
0.45
0.45
V
IO = 12 mA; VCCO = 2.3 V
0.3
0.3
V
IO = 24 mA; VCCO = 3.0 V
0.55
0.55
V
IO = 32 mA; VCCO = 4.5 V
0.55
0.55
V
±2
±10
μA
±2
±10
μA
±2
±10
μA
±2
±10
μA
±2
±10
μA
±2
±10
μA
DIR, OE input;
VI = 0V to 5.5V ;
VCCI = 1.2V to 5.5V
A or B port;
VO = 0 V or VCCO;
VCCO = 1.2 V to 5.5 V
[2]
suspend mode A port;
VO = 0 V or VCCO;
VCC(A) = 5.5 V;
VCC(B) = 0 V
[2]
suspend mode B port;
VO = 0 V or VCCO;
VCC(A) = 0 V;
VCC(B) = 5.5 V
[2]
A port;
VI or VO = 0 V to 5.5 V;
VCC(A) = 0 V; VCC(B) = 1.2
V to 5.5 V
B port;
VI or VO = 0 V to 5.5 V;
8
74LVC4245
Octal dual supply translating transceiver; 3-state
VCC(B) = 0 V; VCC(A) = 1.2
V to 5.5 V
Rev. 1.0 – Aug 08, 2024
9
74LVC4245
Octal dual supply translating transceiver; 3-state
Symbol
Parameter
Conditions
-40 °C to +85 °C
Min
Typ
-40 °C to +125 °C
Max
Min
Max
Unit
A port; VI = 0 V or VCCI;
IO = 0 A
[1]
VCC(A), VCC(B)=1.2V to 5.5V
15
20
μA
VCC(A) = 5.5V; VCC(B) = 0V
15
20
μA
VCC(A) = 0V; VCC(B) = 5.5V
ICC
supply
current
-2
-4
μA
B port; VI = 0 V or VCCI;
IO = 0 A
VCC(A), VCC(B)=1.2V to 5.5V
VCC(B) = 0V; VCC(A) = 5.5V
VCC(B) = 5.5V; VCC(A) = 0V
15
-2
20
-4
μA
μA
15
20
μA
25
30
μA
50
75
μA
50
75
μA
50
75
μA
A plus B port
(ICC(A) + ICC(B));
IO = 0 A; VI = 0 V or VCCI
VCC(A), VCC(B)=1.2V to 5.5V
ΔICC
additional
supply
current
per input;
VCC(A), VCC(B) = 3.0V to
5.5V
DIR and OE input;
DIR or OE input at VCC(A) 0.6V; A port at VCC(A) or
GND; B port = open
A port; A port at VCC(A) 0.6 V; DIR at VCC(A);
B
port
=
open
[4]
B port; B port at VCC(B) 0.6 V; DIR at VCC(B);
A
port
=
open
[4]
[1] VCCI is the supply voltage associated with the data input port.
[2] VCCO is the supply voltage associated with the output port.
[3] To guarantee the node switches, an external driver must source/sink at least IBHLO / IBHHO when the input is in the range VIL to VIH.
[4] For non bus hold parts only (74LVC4245).
Rev. 1.0 – Aug 08, 2024
10
74LVC4245
Octal dual supply translating transceiver; 3-state
10. Dynamic Characteristics
Table 7. Dynamic characteristics for temperature range -40 °C to +85 °C
Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 6. for waveforms see Fig. 3 and Fig. 4. [1]
Symbol Parameter
Conditions
VCC(B)
Unit
1.5V±0.1V 1.8V±0.15V 2.5V±0.2V
3.3V±0.3V 5.0V±0.5V
Min Max Min Max Min Max Min Max Min Max
VCC(A) = 1.5 V ± 0.1 V
tpd
propagation An to Bn
0.9 43.2 0.9 39.2 0.8 36.3 0.7 35.1 0.7 35.1
ns
time
Bn to An
0.9 43.2 0.9 39.2 0.8 36.3 0.7 35.1 0.7 35.1
ns
tdis
disable time OE to An
1.5 72.5 1.5 72.5 1.5 72.5 1.5 72.5 1.4 72.5
ns
1.5
72.5
1.5
72.5
1.5
72.5
1.5
72.5
1.4
72.5
ns
OE to Bn
ten
enable time OE to An
0.4 92.2 0.4 92.2 0.4 92.2 0.4 92.2 0.4 92.2
ns
0.
4
92.2
0.4
92.2
0.4
92.2
0.4
92.2
0.4
92.2
ns
OE to Bn
VCC(A) = 1.8 V ± 0.15 V
tpd
propagation An to Bn
0.9 38.6 0.9 30.5 0.8 26.9 0.7 26.3 0.7 25.8
ns
time
Bn to An
0.9 38.6 0.9 30.5 0.8 26.9 0.7 26.3 0.7 25.8
ns
tdis
disable time OE to An
1.5 46.3 1.5 46.3 1.5 46.3 1.5 46.3 1.4 46.3
ns
1.5 46.3 1.5 46.3 1.5 46.3 1.5 46.3 1.4 46.3
ns
OE to Bn
ten
enable time OE to An
0.4 63.2 0.4 58.1 0.4 54.6 0.4 54.1 0.4 53.1
ns
0.4 63.2 0.4 58.1 0.4 54.6 0.4 54.1 0.4 53.1
ns
OE to Bn
VCC(A) = 2.5 V ± 0.2 V
tpd
propagation An to Bn
1.2 33.0 1.2 24.7 1.0 19.7 1.0 18.3 0.9 17.1
ns
time
Bn to An
1.2 33.0 1.2 24.7 1.0 19.7 1.0 18.3 0.9 17.1
ns
tdis
disable time OE to An
1.4 25.1 1.4 25.1 1.4 25.1 1.4 25.1 1.4 25.1
ns
1.4
25.1
1.4
25.1
1.4
25.1
1.4
25.1
1.4
25.1
ns
OE to Bn
ten
enable time OE to An
1.0 38.3 1.0 33.1 1.0 29.5 1.0 28.0 1.0 27.0
ns
1.
0
38.3
1.0
33.1
1.0
29.5
1.0
28.0
1.0
27.0
ns
OE to Bn
VCC(A) = 3.3 V ± 0.3 V
tpd
propagation An to Bn
0.8 31.2 0.8 22.6 0.8 16.2 0.7 14.5 0.6 13.6
ns
time
Bn to An
0.8 31.2 0.8 22.6 0.8 16.2 0.7 14.5 0.6 13.6
ns
tdis
disable time OE to An
1.6 20.2 1.6 20.2 1.6 20.2 1.6 20.2 1.6 20.2
ns
1.6 20.2 1.6 20.2 1.6 20.2 1.6 20.2 1.6 20.2
ns
OE to Bn
ten
enable time OE to An
0.8 31.5 0.8 25.8 0.8 22.4 0.8 21.1 0.8 20.8
ns
1.8 31.5 0.8 25.8 0.8 22.4 0.8 21.1 0.8 20.8
ns
OE to Bn
VCC(A) = 5.0 V ± 0.5 V
tpd
propagation An to Bn
0.7 29.8 0.7 21.3 0.4 14.8 0.3 12.6 0.3 11.2
ns
time
Bn to An
0.7 29.8 0.7 21.3 0.4 14.8 0.3 12.6 0.3 11.2
ns
tdis
disable time OE to An
0.3 15.6 0.3 15.6 0.3 15.6 0.3 15.6 0.3 15.6
ns
0.3 15.6 0.3 15.6 0.3 15.6 0.3 15.6 0.3 15.6
ns
OE to Bn
ten
enable time OE to An
0.7 29.1 0.7 21.2 0.7 18.5 0.7 16.8 0.7 15.9
ns
0.7 29.1 0.7 21.2 0.7 18.5 0.7 16.8 0.7 15.9
ns
OE to Bn
[1] tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH.
Rev. 1.0 – Aug 08, 2024
11
74LVC4245
Octal dual supply translating transceiver; 3-state
Table 8. Dynamic characteristics for temperature range -40 °C to +125 °C
Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 6. for waveforms see Fig. 3 and Fig. 4. [1]
Symbol Parameter
Conditions
VCC(B)
Unit
1.5V±0.1V
1.8V±0.15V 2.5V±0.2V
3.3V±0.3V
5.0V±0.5V
Min Max Min Max Min Max Min Max Min Max
VCC(A) = 1.5 V ± 0.1 V
tpd
propagation An to Bn
0.9 43.3 0.9 38.9 0.8 36.3 0.7 35.1 0.7 35.1
ns
time
Bn to An
0.9 43.3 0.9 38.9 0.8 36.3 0.7 35.1 0.7 35.1
ns
tdis
disable time OE to An
1.5 74.5 1.5 74.5 1.5 74.5 1.5 74.5 1.4 74.5
ns
1.5 74.5 1.5 74.5 1.5 74.5 1.5 74.5 1.4 74.5
ns
OE to Bn
ten
enable time OE to An
0.4 94.2 0.4 94.2 0.4 94.2 0.4 94.2 0.4 94.2
ns
0.4 94.2 0.4 94.2 0.4 94.2 0.4 94.2 0.4 94.2
ns
OE to Bn
VCC(A) = 1.8 V ± 0.15 V
tpd
propagation An to Bn
0.9 38.4 0.9 30.8 0.8 27.8 0.7 26.4 0.7 25.3
ns
time
Bn to An
0.9 38.4 0.9 30.8 0.8 27.8 0.7 26.4 0.7 25.3
ns
tdis
disable time OE to An
1.5 50.3 1.5
50
1.5 50.2 1.5 50.4 1.4 50.3
ns
1.5
50.3
1.5
50
1.5
50.2
1.5
50.4
1.4
50.3
ns
OE to Bn
ten
enable time OE to An
0.4 67.2 0.4 61.8 0.4 58.5 0.4 58.2 0.4 57.1
ns
0.
4
67.2
0.4
61.8
0.4
58.5
0.4
58.2
0.4
57.1
ns
OE to Bn
VCC(A) = 2.5 V ± 0.2 V
tpd
propagation An to Bn
1.2 33.4 1.2 25.4 1.0 19.7 1.0 18.5 0.9 17.3
ns
time
Bn to An
1.2 33.4 1.2 25.4 1.0 19.7 1.0 18.5 0.9 17.3
ns
tdis
disable time OE to An
1.4 29.1 1.4 28.8 1.4
29
1.4 29.2 1.4 29.1
ns
1.4 29.1 1.4 28.8 1.4
29
1.4 29.2 1.4 29.1
ns
OE to Bn
ten
enable time OE to An
1.0 42.3 1.0 36.8 1.0 33.4 1.0 32.1 1.0 31.0
ns
1.0 42.3 1.0 36.8 1.0 33.4 1.0 32.1 1.0 31.0
ns
OE to Bn
VCC(A) = 3.3 V ± 0.3 V
tpd
propagation An to Bn
0.8 32.2 0.8 23.2 0.8 16.8 0.7 15.5 0.6 14.6
ns
time
Bn to An
0.8 32.2 0.8 23.2 0.8 16.8 0.7 15.5 0.6 14.6
ns
tdis
disable time OE to An
1.6 24.2 1.6 23.9 1.6 24.1 1.6 24.3 1.6 24.2
ns
1.6
24.2
1.6
23.9
1.6
24.1
1.6
24.3
1.6
24.2
ns
OE to Bn
ten
enable time OE to An
0.8 35.5 0.8 29.5 0.8 26.3 0.8 25.2 0.8 24.8
ns
0.
8
35.5
0.8
29.5
0.8
26.3
0.8
25.2
0.8
24.8
ns
OE to Bn
VCC(A) = 5.0 V ± 0.5 V
tpd
propagation An to Bn
0.7 30.4 0.7 22.1 0.4 15.5 0.3 13.4 0.3 11.9
ns
time
Bn to An
0.7 30.4 0.7 22.1 0.4 15.5 0.3 13.4 0.3 11.9
ns
tdis
disable time OE to An
0.3 19.6 0.3 19.3 0.3 19.5 0.3 19.7 0.3 19.6
ns
0.3 19.6 0.3 19.3 0.3 19.5 0.3 19.7 0.3 19.6
ns
OE to Bn
ten
enable time OE to An
0.7 33.1 0.7 24.9 0.7 22.4 0.7 20.9 0.7 19.9
ns
0.7 33.1 0.7 24.9 0.7 22.4 0.7 20.9 0.7 19.9
ns
OE to Bn
[1] tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH.
Rev. 1.0 – Aug 08, 2024
12
74LVC4245
Octal dual supply translating transceiver; 3-state
Table 9. Typical power dissipation capacitance at VCC(A) = VCC(B) and Tamb = 25 °C
Voltages are referenced to GND (ground = 0 V). [1][2]
Symbol
Parameter
Conditions
CPD
power
dissipation
capacitance
A port: (direction A to B);
B port: (direction B to A)
A port: (direction B to A);
B port: (direction A to B)
VCC(A) and VCC(B)
Unit
1.8 V
2.5 V
3.3 V
5.0 V
1
1
1
1
pF
16
16
17
18
pF
[1] CPD is used to determine the dynamic power dissipation (PD in μW).
PD = CPD × VCC2 × fi × N + Σ(CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
Σ(CL × VCC2 × fo) = sum of outputs.
[2] fi = 10 MHz; VI = GND to VCC; tr = tf = 1 ns; CL = 0 pF; RL = ∞ Ω.
Rev. 1.0 – Aug 08, 2024
13
74LVC4245
Octal dual supply translating transceiver; 3-state
10.1. Waveforms and test circuit
Measurement points are given in Table 10.
VOL and VOH are typical output voltage levels that occur with the output load.
Fig. 4. The input An, Bn to output Bn, An propagation delays
Measurement points are given in Table 10.
VOL and VOH are typical output voltage levels that occur with the output load.
Fig. 5. 3-state enable and disable times
Table 10. Measurement points
Supply voltage
Input [1]
Output [2]
VCC(A), VCC(B)
VM
VM
VX
VY
1.2 V to 1.6 V
0.5VCCI
0.5VCCO
VOL + 0.1 V
VOH - 0.1 V
1.65 V to 2.7 V
0.5VCCI
0.5VCCO
VOL + 0.15 V
VOH - 0.15 V
3.0 V to 5.5 V
0.5VCCI
0.5VCCO
VOL + 0.3 V
VOH - 0.3 V
[1] VCCI is the supply voltage associated with the data input port.
[2] VCCO is the supply voltage associated with the output port.
Rev. 1.0 – Aug 08, 2024
14
74LVC4245
Octal dual supply translating transceiver; 3-state
Test data is given in Table 11.
Definitions for test circuit:
RL = Load resistance.
CL = Load capacitance including jig and probe capacitance.
RT = Termination resistance should be equal to the output impedance Zo of the pulse generator.
VEXT = External voltage for measuring switching times.
Fig. 6. Test circuit for measuring switching times
Table 11. Test data
Supply voltage
Input
Load
VEXT
VCC(A), VCC(B)
VI [1]
tr = tf
CL
RL
tPLH, tPHL
tPZH, tPHZ
tPZL, tPLZ [2]
1.2 V to 5.5 V
VCCI
≤ 2.5 ns
15 pF
2kΩ
open
GND
2VCCO
[1] VCCI is the supply voltage associated with the data input port.
[2] VCCO is the supply voltage associated with the output port.
Rev. 1.0 – Aug 08, 2024
15
74LVC4245
Octal dual supply translating transceiver; 3-state
11. Package Outline
TSSOP-24L
Symbol
A
A1
A2
A3
b
b1
c
c1
D
E1
Rev. 1.0 – Aug 08, 2024
Dimensions In Millimeters
Min.
Max.
1.20
0.05
0.15
0.80
1.05
0.39
0.49
0.20
0.28
0.19
0.25
0.13
0.17
0.12
0.14
6.40
6.60
4.30
4.50
Dimensions In Millimeters
Min.
Max.
6.20
6.60
0.65BSC
0.45
0.75
1.00REF
0°
8°
16
74LVC4245
Octal dual supply translating transceiver; 3-state
12. Abbreviations
Table 12. Abbreviations
Acronym
Description
CMOS
Complementary Metal-Oxide Semiconductor
DUT
Device Under Test
ESD
ElectroStatic Discharge
HBM
Human Body Model
CDM
Charged Device Model
13. Revision History
Table 13. Revision history
Document ID
Release Date
Data sheet status
74LVC4245 Rev. 1.0
Feb 10, 2025
Draft datasheet
Rev. 1.0 – Aug 08, 2024
Change notice
Supersedes
17