Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT163500
SCCS066 - June 1997 - Revised March 2000
18-Bit Registered Transceiver
Features
Functional Description
• Low power, pin-compatible replacement for LCX and
LPT families
• 5V tolerant inputs and outputs
The CY74FCT163500 is an 18-bit universal bus transceiver
that can be operated in transparent, latched, or clock modes
by combining D-type latches and D-type flip-flops. Data flow in
each direction is controlled by output-enable (OEAB and
OEBA), latch enable (LEAB and LEBA), and clock inputs
(CLKAB and CLKBA) inputs. For A-to-B data flow, the device
operates in transparent mode when LEAB is HIGH. When
LEAB is LOW, the A data is latched if CLKAB is held at a HIGH
or LOW logic level. If LEAB is LOW, the A bus data is stored in
the latch/flip-flop on the HIGH-to-LOW transition of CLKAB.
OEAB performs the output enable function on the B port. Data
flow from B-to-A is similar to that of A-to-B and is controlled by
OEBA, LEBA, and CLKBA.
• 24 mA balanced drive outputs
• Power-off disable outputs permits live insertion
• Edge-rate control circuitry for reduced noise
• FCT-C speed at 4.6 ns
• Latch-up performance exceeds JEDEC standard no. 17
• ESD > 2000V per MIL-STD-883D, Method 3015
• Typical output skew < 250ps
• Industrial temperature range of –40˚C to +85˚C
• TSSOP (19.6-mil pitch) or SSOP (25-mil pitch)
• Typical Volp (ground bounce) performance exceeds Mil
Std 883D
The CY74FCT163500 has 24-mA balanced output drivers
with current limiting resistors in the outputs. This reduces the
need for external terminating resistors and provides for
minimal undershoot and reduced ground bounce.The inputs
and outputs are capable of being driven by 5.0V busses,
allowing them to be used in mixed voltage systems as
translators. The outputs are also designed with a power off
disable feature enabling them to be used in applications
requiring live insertion.
• VCC = 2.7V to 3.6V
Logic Block Diagram
Pin Configuration
SSOP/TSSOP
Top View
GND
1
2
3
4
56
55
54
OEAB
LEAB
CLKAB
B
1
A
1
OEAB
GND
GND
53
52
51
50
B
2
A
2
5
6
CLKBA
B
V
A
3
3
V
CC
CC
LEBA
OEBA
7
B
A
4
4
5
6
49
48
47
46
8
A
A
B
B
5
6
9
CLKAB
LEAB
10
11
GND
GND
A
7
B
7
45
44
43
12
13
A
A
B
B
B
8
9
8
C
D
C
D
14
15
16
17
18
9
B
1
A
10
42
41
A
1
10
A
A
B
11
B
12
11
12
40
39
38
GND
GND
C
D
C
D
A
A
A
B
13
14
15
19
20
21
22
23
13
14
15
B
37
36
35
34
B
V
V
CC
CC
B
16
A
16
17
A
33
32
31
30
29
B
17
24
25
TO 17 OTHER CHANNELS
GND
GND
A
B
18
26
27
28
18
OEBA
LEBA
CLKBA
GND
Copyright © 2000, Texas Instruments Incorporated