This 16-bit (dual-octal) noninverting bus transceiver contains two separate supply rails. B port has VCCB, which is set to operate at 3.3 V and 5 V. A port has VCCA, which is set to operate at 2.5 V and 3.3 V. This allows for translation from a 2.5-V to a 3.3-V
environment, and vice versa, or from a 3.3-V to a 5-V environment, and vice versa.
The SN74ALVC164245 is designed for asynchronous communication between data buses. The control circuitry (1DIR, 2DIR, 1OE, and 2OE) is powered by VCCA.
To ensure the high-impedance state during power up or power down, the output-enable (OE) input 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.
The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
SN74ALVC164245 | TSSOP (48) | 12.50 mm × 6.10 mm |
SSOP (48) | 15.88 mm × 7.49 mm | |
BGA MICROSTAR JUNIOR (56) | 7.00 mm × 4.50 mm | |
BGA MICROSTAR JUNIOR (54) | 8.00 mm × 5.50 mm |
Changes from P Revision (November 2005) to Q Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | 1DIR | — | Direction Pin 1 |
2 | 1B1 | I/O | 1B1 input or output |
3 | 1B2 | I/O | 1B2 input or output |
4 | GND | — | Ground pin |
5 | 1B3 | I/O | 1B3 input or output |
6 | 1B4 | I/O | 1B4 input or output |
7 | VCCB
(3.3 V, 5 V) |
— | Power pin |
8 | 1B5 | I/O | 1B5 input or output |
9 | 1B6 | I/O | 1B6 input or output |
10 | GND | — | Ground pin |
11 | 1B7 | I/O | 1B7 input or output |
12 | 1B8 | I/O | 1B8 input or output |
13 | 2B1 | I/O | 2B1 input or output |
14 | 2B2 | I/O | 2B2 input or output |
15 | GND | — | Ground pin |
16 | 2B3 | I/O | 2B3 input or output |
17 | 2B4 | I/O | 2B4 input or output |
18 | VCCB
(3.3 V, 5 V) |
— | Power pin |
19 | 2B5 | I/O | 2B5 input or output |
20 | 2B6 | I/O | 2B6 input or output |
21 | GND | — | Ground pin |
22 | 2B7 | I/O | 2B7 input or output |
23 | 2B8 | I/O | 2B8 input or output |
24 | 2DIR | — | Direction pin 2 |
25 | 2OE | I | Output Enable 2 |
26 | 2A8 | I/O | 2A8 input or output |
27 | 2A7 | I/O | 2A7 input or output |
28 | GND | — | Ground pin |
29 | 2A6 | I/O | 2A6 input or output |
30 | 2A5 | I/O | 2A5 input or output |
31 | VCCA
(2.5 V, 3.3 V) |
— | Power pin |
32 | 2A4 | I/O | 2A4 input or output |
33 | 2A3 | I/O | 2A3 input or output |
34 | GND | — | Ground pin |
35 | 2A2 | I/O | 2A2 input or output |
36 | 2A1 | I/O | 2A1 input or output |
37 | 1A8 | I/O | 1A8 input or output |
38 | 1A7 | I/O | 1A7 input or output |
39 | GND | — | Ground pin |
40 | 1A6 | I/O | 1A6 input or output |
41 | 1A5 | I/O | 1A5 input or output |
42 | VCCA
(2.5 V, 3.3 V) |
— | Power pin |
43 | 1A4 | I/O | 1A4 input or output |
44 | 1A3 | I/O | 1A3 input or output |
45 | GND | — | Ground pin |
46 | 1A2 | I/O | 1A2 input or output |
47 | 1A1 | I/O | 1A1 input or output |
48 | 1OE | I | Output Enable 1 |
1 | 2 | 3 | 4 | 5 | 6 | |
---|---|---|---|---|---|---|
A | 1DIR | NC | NC | NC | NC | 1OE |
B | 1B2 | 1B1 | GND | GND | 1A1 | 1A2 |
C | 1B4 | 1B3 | VCCB | VCCA | 1A3 | 1A4 |
D | 1B6 | 1B5 | GND | GND | 1A5 | 1A6 |
E | 1B8 | 1B7 | — | — | 1A7 | 1A8 |
F | 2B1 | 2B2 | — | — | 2A2 | 2A1 |
G | 2B3 | 2B4 | GND | GND | 2A4 | 2A3 |
H | 2B5 | 2B6 | VCCB | VCCA | 2A6 | 2A5 |
J | 2B7 | 2B8 | GND | GND | 2A8 | 2A7 |
K | 2DIR | NC | NC | NC | NC | 2OE |
1 | 2 | 3 | 4 | 5 | 6 | |
---|---|---|---|---|---|---|
A | 1B1 | NC | 1DIR | 1OE | NC | 1A1 |
B | 1B3 | 1B2 | NC | NC | 1A2 | 1A3 |
C | 1B5 | 1B4 | VCCB | VCCA | 1A4 | 1A5 |
D | 1B7 | 1B6 | GND | GND | 1A6 | 1A7 |
E | 2B1 | 1B8 | GND | GND | 1A8 | 2A1 |
F | 2B3 | 2B2 | GND | GND | 2A2 | 2A3 |
G | 2B5 | 2B4 | VCCB | VCCA | 2A4 | 2A5 |
H | 2B7 | 2B6 | NC | NC | 2A6 | 2A7 |
J | 2B8 | NC | 2DIR | 2OE | NC | 2A8 |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VCC | Supply voltage | VCCA | –0.5 | 4.6 | V |
VCCB | –0.5 | 6 | |||
VI | Input voltage | Except I/O ports(2) | –0.5 | 6 | V |
I/O port A(3) | –0.5 | VCCA + 0.5 | |||
I/O port B(2) | –0.5 | VCCB + 0.5 | |||
IIK | Input clamp current | VI < 0 | –50 | mA | |
IOK | Output clamp current | VO < 0 | –50 | mA | |
IO | Continuous output current | ±50 | mA | ||
Continuous current through each VCC or GND | ±100 | mA | |||
Tstg | Storage temperature | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±1000 |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VCCB | Supply voltage | 3 | 5.5 | V | |
VIH | High-level input voltage | 2 | V | ||
VIL | Low-level input voltage | VCCB = 3 V to 3.6 V | 0.7 | V | |
VCCB = 4.5 V to 5.5 V | 0.8 | ||||
VIB | Input voltage | 0 | VCCB | V | |
VOB | Output voltage | 0 | VCCB | V | |
IOH | High-level output current | –24 | mA | ||
IOL | Low-level output current | 24 | mA | ||
Δt/Δv | Input transition rise or fall rate | 10 | ns/V | ||
TA | Operating free-air temperature | –40 | 85 | °C |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VCCA | Supply voltage | 2.3 | 3.6 | V | |
VIH | High-level input voltage | VCCA = 2.3 V to 2.7 V | 1.7 | V | |
VCCA = 3 V to 3.6 V | 2 | ||||
VIL | Low-level input voltage | VCCA = 2.3 V to 2.7 V | 0.7 | V | |
VCCA = 3 V to 3.6 V | 0.8 | ||||
VIA | Input voltage | 0 | VCCA | V | |
VOA | Output voltage | 0 | VCCA | V | |
IOH | High-level output current | VCCA = 2.3 V | –18 | mA | |
VCCA = 3 V | –24 | ||||
IOL | Low-level output current | VCCA = 2.3 V | 18 | mA | |
VCCA = 3 V | 24 | ||||
Δt/Δv | Input transition rise or fall rate | 10 | ns/V | ||
TA | Operating free-air temperature | –40 | 85 | °C |
THERMAL METRIC(1) | SN74ALVC164245 | UNIT | ||||
---|---|---|---|---|---|---|
DGG (TSSOP) |
DL (SSOP) |
ZQL (BGA MICROSTAR JUNIOR) |
ZRD (BGA MICROSTAR JUNIOR) |
|||
48 PINS | 48 PINS | 56 PINS | 54 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 60.7 | 63.6 | 54.5 | 50.7 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 14.3 | 30.1 | 19.1 | 17.9 | °C/W |
RθJB | Junction-to-board thermal resistance | 27.7 | 36.2 | 21.7 | 20.2 | °C/W |
ψJT | Junction-to-top characterization parameter | 0.5 | 8.1 | 0.5 | 0.5 | °C/W |
ψJB | Junction-to-board characterization parameter | 27.6 | 35.6 | 21.7 | 19.9 | °C/W |
PARAMETER | TEST CONDITIONS | VCCA | VCCB | MIN | TYP(1) | MAX | UNIT | |
---|---|---|---|---|---|---|---|---|
VOH | B to A | IOH = –100 µA | 2.7 V to 3.6 V | VCC – 0.2 | V | |||
IOH = –12 mA | 2.7 V | 2.2 | ||||||
3 V | 2.4 | |||||||
IOH = –24 mA | 3 V | 2 | ||||||
A to B | IOH = –100 µA | 4.5 V | 4.3 | |||||
5.5 V | 5.3 | |||||||
IOH = –24 mA | 4.5 V | 3.7 | ||||||
5.5 V | 4.7 | |||||||
VOL | B to A | IOL = 100 µA | 2.7 V to 3.6 V | 0.2 | V | |||
IOL = 12 mA | 2.7 V | 0.4 | ||||||
IOL = 24 mA | 3 V | 0.55 | ||||||
A to B | IOL = 100 µA | 4.5 V to 5.5 V | 0.2 | |||||
IOL = 24 mA | 4.5 V to 5.5 V | 0.55 | ||||||
II | Control inputs | VI = VCCA/VCCB or GND | 3.6 V | 5.5 V | ±5 | µA | ||
IOZ(2) | A or B port | VO = VCCA/VCCB or GND | 3.6 V | 5.5 V | ±10 | µA | ||
ICC | VI = VCCA/VCCB or GND, IO = 0 | 3.6 V | 5.5 V | 40 | µA | |||
ΔICC(3) | One input at VCCA/VCCB – 0.6 V, Other inputs at VCCA/VCCB or GND |
3 V to 3.6 V | 4.5 V to 5.5 V | 750 | µA | |||
Ci | Control inputs | VI = VCCA/VCCB or GND | 3.3 V | 5 V | 6.5 | pF | ||
Cio | A or B port | VO = VCCA/VCCB or GND | 3.3 V | 3.3 V | 8.5 | pF |
PARAMETER | TEST CONDITIONS | VCCA | VCCB | MIN | MAX | UNIT | |
---|---|---|---|---|---|---|---|
VOH | B to A | IOH = –100 µA | 2.3 V to 2.7 V | 3 V to 3.6 V | VCCA – 0.2 | V | |
IOH = –8 mA | 2.3 V | 3 V to 3.6 V | 1.7 | ||||
IOH = –12 mA | 2.7 V | 3 V to 3.6 V | 1.8 | ||||
A to B | IOH = –100 µA | 2.3 V to 2.7 V | 3 V to 3.6 V | VCCB – 0.2 | |||
IOH = –18 mA | 2.3 V to 2.7 V | 3 V | 2.2 | ||||
VOL | B to A | IOL = 100 µA | 2.3 V to 2.7 V | 3 V to 3.6 V | 0.2 | V | |
IOL = 12 mA | 2.3 V | 3 V to 3.6 V | 0.6 | ||||
A to B | IOL = 100 µA | 2.3 V to 2.7 V | 3 V to 3.6 V | 0.2 | |||
IOL = 18 mA | 2.3 V | 3 V | 0.55 | ||||
II | Control inputs | VI = VCCA/VCCB or GND | 2.3 V to 2.7 V | 3 V to 3.6 V | ±5 | µA | |
IOZ(1) | A or B port | VO = VCCA/VCCB or GND | 2.3 V to 2.7 V | 3 V to 3.6 V | ±10 | µA | |
ICC | VI = VCCA/VCCB or GND, IO = 0 | 2.3 V to 2.7 V | 3 V to 3.6 V | 20 | µA | ||
ΔICC(2) | One input at VCCA/VCCB – 0.6 V, Other inputs at VCCA/VCCB or GND |
2.3 V to 2.7 V | 3 V to 3.6 V | 750 | µA |
PARAMETER | FROM (INPUT) |
TO (OUTPUT) |
VCCB = 3.3 V ± 0.3 V |
VCCB = 5 V ± 0.5 V | UNIT | ||||
---|---|---|---|---|---|---|---|---|---|
VCCA = 2.5 V ± 0.2 V |
VCCA = 2.7 V | VCCA = 3.3 V ± 0.3 V |
|||||||
MIN | MAX | MIN | MAX | MIN | MAX | ||||
tpd | A | B | 7.6 | 5.9 | 1 | 5.8 | ns | ||
B | A | 7.6 | 6.7 | 1.2 | 5.8 | ||||
ten | OE | B | 11.5 | 9.3 | 1 | 8.9 | ns | ||
tdis | OE | B | 10.5 | 9.2 | 2.1 | 9.5 | ns | ||
ten | OE | A | 12.3 | 10.2 | 2 | 9.1 | ns | ||
tdis | OE | A | 9.3 | 9 | 2.9 | 8.6 | ns |
PARAMETER | TEST CONDITIONS | VCCB = 3.3 V | VCCB = 5 V | UNIT | |||
---|---|---|---|---|---|---|---|
VCCA = 2.5 V | VCCA = 3.3 V | ||||||
TYP | TYP | ||||||
Cpd | Power dissipation capacitance | Outputs enabled (B) | CL = 50 pF, f = 10 MHz | 55 | 56 | pF | |
Outputs disabled (B) | 27 | 6 | |||||
Outputs enabled (A) | CL = 50 pF, f = 10 MHz | 118 | 56 | ||||
Outputs disabled (A) | 58 | 6 |