1CY74FCT162827T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16827T
CY74FCT162827T
20-Bit Buffers/Line Drivers
SCCS064B - August 1994 - Revised September 2001
Features
• Ioff Supports Partial-Power-Down Mode Operation
• Edge-rate control circuitry for significantly improved
noise characteristics
• Typical output skew < 250 ps
• ESD > 2000V
• TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)
packages
• Industrial temperature range of −40˚C to +85˚C
• VCC = 5V ± 10%
CY74FCT16827T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce) <1.0V at VCC = 5V,
TA = 25˚C
Functional Description
The CY74FCT16827T 20-bit buffer/line driver and the
CY74FCT162827T
20-bit
buffer/line
driver
provide
high-performance bus interface buffering for wide data/address
paths or buses carrying parity. These parts can be used as a single
20-bit buffer or two 10-bit buffers. Each 10-bit buffer has a pair of
NANDed OE for increased flexibility.
This device is fully specified for partial-power-down
applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device
when it is powered down.
The CY74FCT16827T is ideally suited for driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162827T 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
CY74FCT162827T is ideal for driving transmission lines.
CY74FCT162827T Features:
• Balanced 24 mA output drivers
• Reduced system switching noise
• Typical VOLP (ground bounce) <0.6V at VCC = 5V,
TA = 25˚C
Logic Block Diagrams
Pin Configuration
SSOP/TSSOP
Top View
1OE1
1OE1
1
56
1OE2
1Y1
2
55
1A 1
1Y2
3
54
1A 2
GND
4
53
GND
1Y3
5
52
1A 3
1Y4
6
51
1A 4
VCC
7
50
VCC
8
49
1A 5
1Y6
9
48
1Y7
10
1A 7
GND
1Y8
11
47
46
45
1A 8
1Y9
12
13
44
1A 9
1Y10
14
43
1A 10
2OE1
2Y1
15
42
2A 1
2OE2
2Y2
16
41
2A 2
2Y3
17
40
2A 3
GND
18
39
GND
2Y4
19
38
2A 4
2Y5
20
37
2A 5
2Y6
21
36
2A 6
VCC
2Y7
22
35
VCC
23
34
2A 7
1OE2
1Y1
1A1
1Y5
TO 9 OTHER CHANNELS
2A1
FCT16827-1
2Y1
1A 6
GND
2Y8
TO 9 OTHER CHANNELS
FCT16827-2
24
GND
25
33
32
2A 8
2Y9
26
31
2A 9
2Y10
27
30
2A10
2OE1
28
29
2OE2
GND
FCT16827-3
Copyright
© 2001, Texas Instruments Incorporated
