Dell MC14553B Schematics

MC14553B

3-Digit BCD Counter

The MC14553B 3–digit BCD counter consists of 3 negative edge triggered BCD counters that are cascaded synchronously. A quad latch at the output of each counter permits storage of any given count. The information is then time division multiplexed, providing one BCD number or digit at a time. Digit select outputs provide display control. All outputs are TTL compatible.

An on–chip oscillator provides the low–frequency scanning clock which drives the multiplexer output selector.

This device is used in instrumentation counters, clock displays, digital panel meters, and as a building block for general logic applications.

• TTL Compatible Outputs

• On–Chip Oscillator

• Cascadable

• Clock Disable Input

• Pulse Shaping Permits Very Slow Rise Times on Input Clock

• Output Latches

• Master Reset

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PDIP–16

P SUFFIX

CASE 648

SOIC–16 DW SUFFIX CASE 751G

MARKING

DIAGRAMS

MC14553BCP

AWLYYWW

14553B

AWLYYWW

MAXIMUM RATINGS (Voltages Referenced to V

Symbol

Vin, V

out

stg

1. Maximum Ratings are those values beyond which damage to the device may occur.

2. Temperature Derating: Plastic “P and D/DW” Packages: – 7.0 mW/C From 65C To 125C

This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, V to the range V

Unused inputs must always be tied to an appropriate logic voltage level (e.g., either V

DC Supply Voltage Range –0.5 to +18.0 V Input or Output Voltage Range

out

Input Current

Output Current

Power Dissipation,

Ambient Temperature Range –55 to +125 °C

Storage Temperature Range –65 to +150 °C Lead Temperature

or VDD). Unused outputs must be left open.

Parameter Value Unit

(DC or Transient)

(DC or Transient) per Pin

per Package (Note 2.)

(8–Second Soldering)

 (Vin or V

)  VDD.

out

) (Note 1.)

–0.5 to VDD + 0.5 V

±10 mA

+20 mA

500 mW

260 °C

and V

should be constrained

out

A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week

ORDERING INFORMATION

Device Package Shipping

MC14553BCP PDIP–16 25/Rail MC14553BDW SOIC–16 47/Rail

 Semiconductor Components Industries, LLC, 2001

February, 2001 – Rev. 5

1 Publication Order Number:

MC14553B/D

MC14553B

CIA CIB

CLOCK

DIS

= PIN 16

O.F.

= PIN 8

Figure 1. Block Diagram

TRUTH TABLE

Inputs

Master

Reset

0 0 0 No Change 0 0 0 Advance 0 X 1 X No Change 0 1 0 Advance 0 1 0 No Change 0 0 X X No Change 0 X X Latched 0 X X 1 Latched 1 X X 0 Q0 = Q1 = Q2 = Q3 = 0

X = Don’t Care

Clock Disable LE

Outputs

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MC14553B

ELECTRICAL CHARACTERISTICS (Voltages Referenced to V

)

– 55C 25C 125C

Typ

(Note 3.)

0 0 0

5.0 10 15

2.25

4.50

6.75

2.75

5.50

8.25

– 0.36

– 0.9 – 3.5

– 0.88 – 2.25

– 8.8

0.88

2.25

8.8

4.0

8.0 20

0.010

0.020

0.030

Max Min Max

0.05

0.05 —

— —

1.5

3.0

4.0

— — —

5.0 10 20

DD DD DD

— — —

4.95

9.95

14.95

— — —

3.5

7.0 11

–0.14 –0.35

–1.1

– 0.36

– 0.9 – 2.4

0.28

0.65

1.20

1.6

3.5 10

— — —

0.05

Characteristic Symbol

Output Voltage “0” Level

= VDD or 0

“1” Level

= 0 or V

Input Voltage “0” Level

= 4.5 or 0.5 Vdc)

= 9.0 or 1.0 Vdc)

= 13.5 or 1.5 Vdc)

“1” Level

= 0.5 or 4.5 Vdc)

= 1.0 or 9.0 Vdc)

= 1.5 or 13.5 Vdc)

Output Drive Current

= 4.6 Vdc) Source —

= 9.5 Vdc) Pin 3

= 13.5 Vdc)

(VOH = 4.6 Vdc) Source — (V

= 9.5 Vdc) Other

= 13.5 Vdc) Outputs

(VOL = 0.4 Vdc) Sink — (V

= 0.5 Vdc) Pin 3

= 1.5 Vdc)

(VOL = 0.4 Vdc) Sink — Other (V

= 0.5 Vdc) Outputs

= 1.5 Vdc)

Input Current I Input Capacitance

= 0)

Quiescent Current

(Per Package)

MR = V

Total Supply Current

(Note 4., 5.)

(Dynamic plus Quiescent, Per Package)

= 50 pF on all outputs, all

Vdc

5.0 10 15

15 — ±0.1 — ±0.00001 ±0.1 — ±1.0 µAdc

— — — — 5.0 7.5 — — pF

5.0 10 15

Min Max Min

— — —

4.95

9.95

14.95

— — —

3.5

7.0 11

– 0.25 – 0.62

– 1.8

– 0.64

– 1.6 – 4.2

0.5

1.1

1.8

3.0

6.0 18

— — —

0.05

0.05 —

— —

1.5

3.0

4.0

— — —

5.0 10 20

– 0.51

— — —

4.95

9.95

14.95

— — —

3.5

7.0 11

– 0.2 – 0.5 – 1.5

– 1.3 – 3.4

0.4

0.9

1.5

2.5

5.0 15

— — —

IT = (0.35 µA/kHz) f + I IT = (0.85 µA/kHz) f + I IT = (1.50 µA/kHz) f + I

buffers switching)

3. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

4. The formulas given are for the typical characteristics only at 25C.

5. To calculate total supply current at loads other than 50 pF: I

) = IT(50 pF) + (CL – 50) Vfk

T(CL

where: I

is in µA (per package), CL in pF, V = (VDD – VSS) in volts, f in kHz is input frequency, and k = 0.004.

— — —

1.5

3.0

4.0

— — —

150 300 600

Unit

Vdc

mAdc

µAdc

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MC14553B

SWITCHING CHARACTERISTICS (Note 6.) (C

Characteristic Figure Symbol V

Output Rise and Fall Time

, t

TLH

Clock to BCD Out 2a t

Clock to Overflow 2a t

Reset to BCD Out 2b t

Clock to Latch Enable Setup Time Master Reset to Latch Enable Setup Time

Removal Time

Latch Enable to Clock

Clock Pulse Width 2a t

Reset Pulse Width 2b t

Reset Removal Time — t

Input Clock Frequency 2a f

Input Clock Rise Time 2b t

= (1.5 ns/pF) CL + 25 ns

THL

, t

= (0.75 ns/pF) CL + 12.5 ns

THL

, t

= (0.55 ns/pF) CL + 9.5 ns

THL

= 50 pF, TA = 25C)

2a t

2b t

TLH

THL

PLH

PHL

rem

WH(cl)

WH(R)

rem

TLH

5.0 10 15

5.0 10

Min Typ

—

(Note 7.)

100 — —

— — —

600 400 200

– 80 – 10

550 200

900

500

200

600

400

200

900

500

300

200

100

– 200

– 70 – 50

275

100

150

1200

600 450

– 80

20 —

— —

600

300

225

– 180

– 50 – 30

1.5

5.0

7.0 No

Limit

50 40

Max Unit

200 100

1800 1000

400

1200

800 400

1800 1000

600

— — —

0.9

2.5

3.5

Disable, MR, Latch Enable

Rise and Fall Times

Scan Oscillator Frequency

(C1 measured in µF)

— t

1 f

TLH

THL

osc

5.0 10 15

— — —

1.5/C1

4.2/C1

7.0/C1

5.0

4.0 —

— —

6. The formulas given are for the typical characteristics only at 25C.

7. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

MHz

µs

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