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NXP Semiconductors - Synchronizing dual D-type flip-flop with metastable immune characteristics

Numéro de référence 74ABT5074N
Description Synchronizing dual D-type flip-flop with metastable immune characteristics
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74ABT5074N fiche technique
Philips Semiconductors Advanced BiCMOS Products
Synchronizing dual D-type flip-flop
with metastable immune characteristics
Product specification
74ABT5074
FEATURES
Metastable immune characteristics
Pin compatible with 74F74 and 74F5074
Typical fMAX = 200MHz
Output skew guaranteed less than 2.0ns
High source current (IOH = 15mA) ideal for clock driver
applications
Output capability: +20mA/–15mA
Latch-up protection exceeds 500mA per Jedec JC40.2 Std 17
ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
DESCRIPTION
The 74ABT5074 is a dual positive edge-triggered D-type flip-flop
featuring individual data, clock, set and reset inputs; also true and
complementary outputs.
Set (SDn) and reset (RDn) are asynchronous active low inputs and
operate independently of the clock (CPn) input. Data must be stable
just one setup time prior to the low-to-high transition of the clock for
guaranteed propagation delays.
Clock triggering occurs at a voltage level and is not directly related
to the transition time of the positive-going pulse. Following the hold
time interval, data at the Dn input may be changed without affecting
the levels of the output.
The 74ABT5074 is designed so that the outputs can never display a
metastable state due to setup and hold time violations. If setup time
and hold time are violated the propagation delays may be extended
beyond the specifications but the outputs will not glitch or display a
metastable state. Typical metastability parameters for the
74ABT5074 are:
τ ≅ 94ps and To 1.3 × 107 sec
where τ represents a function of the rate at which a latch in a
metastable state resolves that condition and T0 represents a
function of the measurement of the propensity of a latch to enter a
metastable state.
PIN CONFIGURATION
RD0 1
D0 2
CP0 3
SD0 4
Q0 5
Q0 6
GND 7
14 VCC
13 RD1
12 D1
11 CP1
10 SD1
9 Q1
8 Q1
SA00001
PIN DESCRIPTION
PIN NUMBER SYMBOL
NAME AND FUNCTION
2, 12
D0, D1 Data inputs
3, 11
CP0, CP1 Clock inputs (active rising edge)
4, 10
SD0, SD1 Set inputs (active-Low)
1, 13
RD0, RD1 Reset inputs (active-Low)
5, 9
Q0, Q1
Data outputs (active-Low),
non-inverting
6, 8
Q0, Q1
Data outputs (active-Low),
inverting
7 GND Ground (0V)
14 VCC Positive supply voltage
QUICK REFERENCE DATA
SYMBOL
PARAMETER
tPLH Propagation delay
tPHL CPn to Qn or Qn
CIN Input capacitance
ICC Total supply current
CONDITIONS
Tamb = 25°C; GND = 0V
CL = 50pF; VCC = 5V
VI = 0V or VCC
Outputs disabled; VCC =5.5V
TYPICAL
2.8
2.4
3
2
UNIT
ns
pF
µA
ORDERING INFORMATION
PACKAGES
14-pin plastic DIP
14-pin plastic SOL
14-pin plastic shrink small outline SSOP Type II
14-pin plastic thin shrink small outline (TSSOP) Type I
TEMPERATURE RANGE
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
ORDER CODE
74ABT5074N
74ABT5074D
74ABT5074DB
74ABT5074PW
DRAWING NUMBER
SOT27-1
SOT108-1
SOT337-1
SOT402-1
December 15, 1994
1
853-1775 14470

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