Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modi鏗乪d to remove devices not offered.
CY74FCT163500
SCCS066 - June 1997 - Revised March 2000
18-Bit Registered Transceiver
Functional Description
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 鏗俰p-鏗俹ps. Data 鏗俹w 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 鏗俹w, 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/鏗俰p-鏗俹p on the HIGH-to-LOW transition of CLKAB.
OEAB performs the output enable function on the B port. Data
鏗俹w from B-to-A is similar to that of A-to-B and is controlled by
OEBA, LEBA, and CLKBA.
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.
Features
鈥?Low power, pin-compatible replacement for LCX and
LPT families
鈥?5V tolerant inputs and outputs
鈥?24 mA balanced drive outputs
鈥?Power-off disable outputs permits live insertion
鈥?Edge-rate control circuitry for reduced noise
鈥?FCT-C speed at 4.6 ns
鈥?Latch-up performance exceeds JEDEC standard no. 17
鈥?ESD > 2000V per MIL-STD-883D, Method 3015
鈥?Typical output skew < 250ps
鈥?Industrial temperature range of 鈥?0藲C to +85藲C
鈥?TSSOP (19.6-mil pitch) or SSOP (25-mil pitch)
鈥?Typical V
olp
(ground bounce) performance exceeds Mil
Std 883D
鈥?V
CC
= 2.7V to 3.6V
Logic Block Diagram
Pin Configuration
SSOP/TSSOP
Top View
OEAB
LEAB
A
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
GND
CLKAB
B
1
GND
B
2
B
3
V
CC
B
4
B
5
B
6
GND
B
7
B
8
B
9
B
10
B
11
B
12
GND
B
13
B
14
B
15
V
CC
B
16
B
17
GND
B
18
CLKBA
GND
OEAB
CLKBA
LEBA
OEBA
CLKAB
LEAB
GND
A
2
A
3
V
CC
A
4
A
5
A
6
GND
A
7
C
C
B
1
D
A
8
A
9
A
10
A
11
A
12
GND
C
D
C
D
A
13
A
14
A
15
V
CC
A
16
A
17
TO 17 OTHER CHANNELS
GND
A
18
OEBA
LEBA
A
1
D
Copyright
漏
2000, Texas Instruments Incorporated
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