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IDT74LVCH162245A 3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 5V TOLERANT I/O
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 5 VOLT TOLERANT I/O AND BUS-HOLD
INDUSTRIAL TEMPERATURE RANGE
IDT74LVCH162245A
FEATURES:
• Typical tSK(o) (Output Skew) < 250ps • ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0) • VCC = 3.3V ± 0.3V, Normal Range • VCC = 2.7V to 3.6V, Extended Range • CMOS power levels (0.4μ W typ. static) • All inputs, outputs, and I/O are 5V tolerant • Available in TSSOP package
DRIVE FEATURES:
• Balanced Output Drivers: ±12mA (A port) • High Output Drivers: ±24mA (B port)
APPLICATIONS:
• 5V and 3.3V mixed voltage systems • Data communication and telecommunication systems
DESCRIPTION:
This 16-bit bus transceiver is built using advanced dual metal CMOS technology. This high-speed, low power transceiver is ideal for asynchronous communication between two busses (A and B). The Direction and Output Enable controls are designed to operate this device as either two independent 8-bit transceivers or one 16-bit transceiver. The direction control pin (DIR) controls the direction of data flow. The output enable pin (OE) overrides the direction control and disables both ports. All inputs are designed with hysteresis for improved noise margin.
All pins can be driven from either 3.3V or 5V devices. This feature allows the use of this device as a translator in a mixed 3.3V/5V supply system.
The LVCH162245A (B port) has been designed with a ±24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance.
The LVCH162245 (A port) has series resistors in the device output structure which will significantly reduce line noise when used with light loads. The driver has been designed to drive ±12mA at the designated threshold levels.
The LVCH162245A has “bus-hold” which retains the inputs’ last state whenever the input goes to a high impedance. This prevents floating inputs and eliminates the need for pull-up/down resistors.
FUNCTIONAL BLOCK DIAGRAM
1DIR 1
1A1 47
46
1A2 1A3 44 1A4 43
41
1A5
40
1A6
38
1A7
1A8 37
48
1OE
2 1B1
3
1B2
5
1B3
6
1B4
8
1B5
9
1B6
11
1B7
12
1B8
24
2DIR
2A1 36
35
2A2
33
2A3
32
2A4
30
2A5
29
2A6
2A7 27
26
2A8
25
2OE 13 2B1
14
2B2
16
2B3
17
2B4
19 2B5
20
2B6
22
2B7
23
2B8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 2015 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
OCTOBER 2015
DSC-4597/5
IDT74LVCH162245A 3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 5V TOLERANT I/O
PIN CONFIGURATION
1DIR
1
1B1
2
1B2
3
GND
4
1B3
5
1B4
6
VCC
7
1B5
8
1B6
9
GND
10
1B7
11
1B8
12
2B1
13
2B2
14
GND
15
2B3
16
2B4
17
VCC
18
2B5
19
2B6
20
GND
21
2B7
22
2B8
23
2DIR
24
48
1OE
47
1A1
46
1A2
45
GND
44
1A3
43
1A4
42
VCC
41
1A5
40
1A6
39
GND
38
1A7
37
1A8
36
2A1
35
2A2
34
GND
33
2A3
32.