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74ABT16821A

20-bit bus-interface D-type flip-flop



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74ABT16821A pdf
74ABT16821A
20-bit bus-interface D-type flip-flop; positive-edge trigger;
3-state
Rev. 03 — 16 March 2010
Product data sheet
1. General description
The 74ABT16821A high-performance BiCMOS device combines low static and dynamic
power dissipation with high speed and high output drive.
The 74ABT16821A has two 10-bit, edge-triggered registers, with each register coupled to
a 3-state output buffer. The two sections of each register are controlled independently by
the clock (nCP) and output enable (nOE) control gates.
Each register is fully edge triggered. The state of each D input, one set-up time before the
LOW-to-HIGH clock transition, is transferred to the corresponding flip-flops Q output.
The 3-state output buffers are designed to drive heavily loaded 3-state buses, MOS
memories, or MOS microprocessors.
The active-LOW output enable (nOE) controls all ten 3-state buffers independent of the
register operation. When nOE is LOW, the data in the register appears at the outputs.
When nOE is HIGH, the outputs are in high-impedance OFF-state, which means they will
neither drive nor load the bus.
2. Features and benefits
„ 20-bit positive-edge triggered register
„ Multiple VCC and GND pins minimize switching noise
„ Live insertion and extraction permitted
„ Output capability: +64 mA and 32 mA
„ Power-up 3-state
„ Power-up reset
„ Latch-up protection exceeds 500 mA per JESD78B class II level A
„ ESD protection:
‹ HBM JESD22-A114F exceeds 2000 V
‹ MM JESD22-A115-A exceeds 200 V



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74ABT16821A pdf
NXP Semiconductors
74ABT16821A
20-bit bus-interface D-type flip-flop; positive-edge trigger; 3-state
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature
range
74ABT16821ADL
40 °C to +85 °C
Name
SSOP56
74ABT16821ADGG 40 °C to +85 °C TSSOP56
Description
plastic shrink small outline package; 56 leads;
body width 7.5 mm
plastic thin shrink small outline package; 56 leads;
body width 6.1 mm
Version
SOT371-1
SOT364-1
4. Functional diagram
Fig 1. IEC logic symbol
1OE 1
1CP 56
2OE 28
2CP 29
55
1D0
1D1 54
1D2 52
1D3 51
1D4 49
1D5 48
1D6 47
1D7 45
1D8 44
1D9 43
2D0 42
2D1 41
2D2 40
2D3 38
2D4 37
2D5 36
2D6 34
2D7 33
2D8 31
2D9 30
EN2
C1
EN4
C3
1D
3D
2
2
3 1Q0
1Q1
5 1Q2
6
1Q3
8 1Q4
9 1Q5
10
1Q6
12 1Q7
13
1Q8
14 1Q9
4 15 2Q0
16 2Q1
17 2Q2
19
2Q3
20 2Q4
21 2Q5
23
24
2Q6
2Q7
26 2Q8
27 2Q9
001aae 8 5 5
74ABT16821A_3
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 16 March 2010
© NXP B.V. 2010. All rights reserved.
2 of 16



Part Number 74ABT16821A
Description 20-bit bus-interface D-type flip-flop
Maker NXP - NXP
Total Page 16 Pages
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