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CD74HC93 データシート(PDF) 1 Page - Texas Instruments

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部品番号 CD74HC93
部品情報  High Speed CMOS Logic 4-Bit Binary Ripple Counter
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CD74HC93 データシート(HTML) 1 Page - Texas Instruments

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Data sheet acquired from Harris Semiconductor
SCHS138
Features
• Can Be Configured to Divide By 2, 8, and 16
• Asynchronous Master Reset
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
Pinout
CD74HC93, CD74HCT93
(PDIP, SOIC)
TOP VIEW
Description
The Harris CD74HC93 and CD74HCT93 are high speed
silicon-gate CMOS devices and are pin-compatible with low
power Schottky TTL (LSTTL). These 4-bit binary ripple
counters consist of four master-slave flip-flops internally
connected to provide a divide-by-two-section and a divid- by-
eight-section. Each section has a separate clock input (CP0
and CP1) to innate state changes of the counter on the HIGH
to LOW clock transition. Sate changes of the Qn outputs do
not occur simultaneously because of internal ripple delays.
Therefore, decoded output signals are subject to decoding
spikes and should not be used for clocks or strobes.
A gated AND asynchronous master reset (MR1 and MR2 is
provided which overrides both clocks and resets (clears) all
flip-flops.
Because the output from the divide by two section is not
internally connected to the succeeding stages, the device
may be operated in various counting modes.
In a 4-bit ripple counter the output Q0 must be connected
externally to input CP1. The input count pulses are applied
to clock input CP0. Simultaneous frequency divisions of 2, 4,
8, and 16 are performed at the Q0, Q1, Q2, and Q3 outputs
as shown in the function table. As a 3-bit ripple counter the
input count pulses are applied to input CP1.
Simultaneous frequency divisions of 2, 4, and 8 are available
at the Q1,Q2,Q3 outputs. Independent use of the first flip-
flop is available if the reset function coincides with the reset
of the 3-bit ripple-through counter.
CP1
MR1
MR2
NC
VCC
NC
NC
CPO
NC
Q0
Q3
GND
Q1
Q2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Ordering Information
PART NUMBER
TEMP. RANGE
(oC)
PACKAGE
PKG.
NO.
CD74HC93E
-55 to 125
14 Ld PDIP
E14.3
CD74HCT93E
-55 to 125
14 Ld PDIP
E14.3
CD74HC93M
-55 to 125
14 Ld SOIC
M14.15
CD74HCT93M
-55 to 125
14 Ld SOIC
M14.15
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Die for this part number is available which meets all electrical
specifications. Please contact your local sales office or Harris
customer service for ordering information.
August 1997
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© Harris Corporation 1997
CD74HC93,
CD74HCT93
High Speed CMOS Logic
4-Bit Binary Ripple Counter
File Number
1849.1
[ /Title
(CD74
HC93,
CD74
HCT93
)
/Sub-
ject
(High
Speed
CMOS
Logic
4-Bit
Binary
Ripple
Counte
r)


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